From w3frg1 at gmail.com Fri Jul 3 06:28:29 2020 From: w3frg1 at gmail.com (Tom-W3FRG) Date: Fri, 3 Jul 2020 06:28:29 -0400 Subject: [Kenwood] (no subject) Message-ID: The small rectangular OEM 6 pin connector (ELP-06V), female pins included, used for the Auto Tune Antenna function on the TS-50S, TS-480, TS-570, TS-590S/SG, TS-850S ACC4, TS-990S, TS-2000, TurboTuner, LDG K-OTT and many, many, more. Mating connectors (ELR-06V) and pins available for making cable extensions. Full details on my W3FRG QRZ Web site. *Free Domestic Shipping* Accept PayPal, MO, Cash or Personal Check. Contact Tom: w3frg1 at gmail dot com for more info. Virus-free. www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> From af5cc2 at gmail.com Sat Jul 4 12:51:25 2020 From: af5cc2 at gmail.com (John Geiger) Date: Sat, 4 Jul 2020 11:51:25 -0500 Subject: [Kenwood] FS: 13 pin DIN plug for ACC jack Message-ID: I have for sale a brand new 13 pin DIN connector used with many Kenwood radios, with short wires hooked to each pin. Much easier than trying to solder to the pins themselves. Great way to hook up digital mode equipment or other I/O connections to the radio. - The package also comes with a 1/8" stereo plug and a couple of spade type fuses. - I am asking $12 shipped in the US and can take paypal/check/Mo. - 73 John AF5CC From kenw8ek at gmail.com Tue Jul 7 09:54:13 2020 From: kenw8ek at gmail.com (Ken, W8EK) Date: Tue, 7 Jul 2020 09:54:13 -0400 Subject: [Kenwood] Original Kenwood Manuals FS Message-ID: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> Original Kenwood Manuals For Sale: . All manuals are in nice condition, for Kenwood equipment. All are Operating manuals unless otherwise specified. TH-21 2 m HT $8 TH-22/42 HT, cover stained $6 TH-215/315/415 HT for 2 m, 220 MHz, 440 MHz $10 TH-225 2 m HT, $12 TL-922 Linear Amplifier $20 TM-221/421 2 m or 440 MHz mobile $12 TM-241/441/541 mobile FM transceivers ...For 2 m, 440 MHz, & 1200 MHz $12 TM-261/461 2m or 440 MHz mobile $12 TM-621/721 Dual Bander $12 TM-732 Dual Bander $12 TM-V7A dual bander $10 TR-2400 2 m HT $12 TR-2500 2 m HT $12 Service manual for TR-2600 2 m HT $12 TS-430 HF Transceiver $15 TS-450 "External Control" (not operating manual) $7 TS-520 SE, HF Transceiver $15 TS-570 S / D HF Transceiver $20 TW-4000 dual band mobile $15 TW-4100 dual band mobile $15 . Accessory items: BC-2 Wall Charger $2 BC-5 DC to DC quick charger $2 DC-21 Dc-DC Converter $2 LF-30A Low Pass Filter $4 MC-30 & MC-35 hand microphones $4 MC-50 Desk Microphone $4 MS-1 mobile stand $3 PB-1, PB-2, PB-3, & PB-4 battery packs $2 PB-21 Battery Pack $2 PB-24 battery pack for TR-2400 $2 PB-25 H battery pack for TR-2500 $2 PS-6 power supply $5 PS-30 power supply $4 SC-8 / 8T Soft Case $2 SMC-24 speaker mic $2 SMC-25 speaker mic $2 SP-820 Speaker $2 . Kenwood Operating Manuals in "Non English" Languages For Sale: All of the following manuals are not in the English language. They are the original Kenwood operating manual only. They look quite extensive and detailed, and are basically new, only being opened to observe that it is something I can not read. They are all original from Kenwood and are all $8 each. Kenwood TH-22 A Two Meter HT Spanish Version for the TH-22 A / 22 AT / 22E and TH-42 A / 42 AT / 42 E Kenwood TH-22 A Two Meter HT French Version for the TH-22 A / 22 AT / 22E and TH-42 A / 42 AT / 42 E Kenwood TM G-707 dual band transceiver Spanish version of the TM G-707 Operating Manual . The above are original manuals only, and not the actual equipment. . I also have many other accessories available such as many different types of microphones, HTs, VHF and UHF rigs, HF and VHF/UHF antennas, connectors, miscellaneous accessories, etc. Just too many to list here. Please e-mail your requests. . Prices do not include shipping from Florida. Thanks. 73, Ken, W8EK Ken Simpson E-mail to W8EK at FLHam.net or W8EK at arrl.net Voice Phone (352) 732-8400 . . From teknoskillz at comcast.net Thu Jul 9 22:53:50 2020 From: teknoskillz at comcast.net (Steve H) Date: Thu, 9 Jul 2020 22:53:50 -0400 Subject: [Kenwood] Matching transformer for mike In-Reply-To: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> References: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> Message-ID: <74C6AC46EE134DE1B831EA8F7259D196@HAL2000> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms to the rigg and the processors output is 600 ohms. Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids? Steve Hearns KA2PTE From 1oldlens1 at ix.netcom.com Thu Jul 9 23:18:03 2020 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Thu, 9 Jul 2020 20:18:03 -0700 Subject: [Kenwood] Matching transformer for mike In-Reply-To: <74C6AC46EE134DE1B831EA8F7259D196@HAL2000> References: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> <74C6AC46EE134DE1B831EA8F7259D196@HAL2000> Message-ID: ?? Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance. ?? In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not. ?? See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical. On 7/9/2020 7:53 PM, Steve H wrote: > I am trying to hook up a Symetrix 528E voice processor to my > Kenwood Hybrid 830S and was told that the mike input is about > 150 ohms > to the rigg and the processors output is 600 ohms. > > Other hams I think use a matching transformer, I guess? 4 to 1? > Anyone out there have any experience selecting a matching xfmr > for the Hybrids? > > Steve Hearns > KA2PTE > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From teknoskillz at comcast.net Fri Jul 10 06:54:09 2020 From: teknoskillz at comcast.net (Steve H) Date: Fri, 10 Jul 2020 06:54:09 -0400 Subject: [Kenwood] Matching transformer for mike In-Reply-To: References: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com><74C6AC46EE134DE1B831EA8F7259D196@HAL2000> Message-ID: <50189E776644423283590F3C5C6ED310@HAL2000> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm and artifacts from the signal. This is the mike I am now using: https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great. But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable. So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all. Steve Hearns KA2PTE ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com> To: Sent: Thursday, July 09, 2020 11:18 PM Subject: Re: [Kenwood] Matching transformer for mike > Level are important. If the output level of the processor is high you need > a resistive attenuator which will also serve to match the impedance. > In general, American practice is to state microphone input impedance as > the expected source impedance, usually there is no need to match > impedances because the source is a voltage source not a power source. For > instance, in historical broadcast equipment and sound equipment designed > to work from low impedance microphones the the typical input impedance was > on the order of 5K ohms or more while the source impedance was on the > order of 150 ohms. For equipment that runs at line level the impedance is > usually a terminating impedance, source impedance can be the same or > sometimes not. > See if the processor is meant to drive a microphone input or a line level > input. If a line level input you need an attenuator to get the level down > to mic level, maybe as much as thirty db. The exact impedance is not > critical. > > On 7/9/2020 7:53 PM, Steve H wrote: >> I am trying to hook up a Symetrix 528E voice processor to my Kenwood >> Hybrid 830S and was told that the mike input is about 150 ohms >> to the rigg and the processors output is 600 ohms. >> >> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out >> there have any experience selecting a matching xfmr for the Hybrids? >> >> Steve Hearns >> KA2PTE >> >> ______________________________________________________________ >> Kenwood mailing list >> Home: http://mailman.qth.net/mailman/listinfo/kenwood >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Kenwood at mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > -- > Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From 1oldlens1 at ix.netcom.com Fri Jul 10 14:45:24 2020 From: 1oldlens1 at ix.netcom.com (Richard Knoppow) Date: Fri, 10 Jul 2020 11:45:24 -0700 Subject: [Kenwood] Matching transformer for mike In-Reply-To: <50189E776644423283590F3C5C6ED310@HAL2000> References: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> <74C6AC46EE134DE1B831EA8F7259D196@HAL2000> <50189E776644423283590F3C5C6ED310@HAL2000> Message-ID: <88089682-67f9-d859-32aa-e9499cac0f48@ix.netcom.com> ? That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it?? If not check BAMA. ? You should not need a transformer for it on either input or output sides. ? There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era. On 7/10/2020 3:54 AM, Steve H wrote: > Thanks Rich, yes, its got a mike and line level option and > inside the compressor on the main board there is a switch that > changes the output > from line or mike. I was told to put that into the mike > position, which I did, and it made a huge difference and > eliminated alot of humm > and artifacts from the signal. > > This is the mike I am now using: > https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 > > > Since its designed around needing phantom power, and the 528E > can supply it, figured it was a good match. When I tried it > with just my headphones monitoring the output of the > compressor, it really did sound great. > > But no matter what I did last night with it set like that, > could not get a whole lot of modulation into the Kenwood where > it was an upgrade over the MC50 Kenwood mike. If I put the mike > gain on the Kenwood past 3, I get lots of distorting and > oscillations without even speaking into the mike. I can cut the > mike gain control or the main level out from the 528E down to > eliminate it, but at the cost of the percent modulation > decreasing way down so its nearly unreadable. > > So far the MC50 mike sounds way better than what I can get from > this setup and it seems like more mike gain would get me more % > modulation, however > as I get it better and hit 3, it just distorts. If I put the > Kenwoods built in compressor on, I can get past 3 and > modulation will improve as I go up, but even with the mike gain > at max, the modulation % is just not very robust at all. > > Steve Hearns > KA2PTE > > ----- Original Message ----- From: "Richard Knoppow" > <1oldlens1 at ix.netcom.com> > To: > Sent: Thursday, July 09, 2020 11:18 PM > Subject: Re: [Kenwood] Matching transformer for mike > > >> Level are important. If the output level of the processor is >> high you need a resistive attenuator which will also serve to >> match the impedance. >> ?In general, American practice is to state microphone input >> impedance as the expected source impedance, usually there is >> no need to match impedances because the source is a voltage >> source not a power source. For instance, in historical >> broadcast equipment and sound equipment designed to work from >> low impedance microphones the the typical input impedance was >> on the order of 5K ohms or more while the source impedance was >> on the order of 150 ohms. For equipment that runs at line >> level the impedance is usually a terminating impedance, source >> impedance can be the same or sometimes not. >> ?See if the processor is meant to drive a microphone input or >> a line level input. If a line level input you need an >> attenuator to get the level down to mic level, maybe as much >> as thirty db. The exact impedance is not critical. >> >> On 7/9/2020 7:53 PM, Steve H wrote: >>> I am trying to hook up a Symetrix 528E voice processor to my >>> Kenwood Hybrid 830S and was told that the mike input is about >>> 150 ohms >>> to the rigg and the processors output is 600 ohms. >>> >>> Other hams I think use a matching transformer, I guess 4 to >>> 1? Anyone out there have any experience selecting a matching >>> xfmr for the Hybrids? >>> >>> Steve Hearns >>> KA2PTE >>> >>> ______________________________________________________________ >>> Kenwood mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Kenwood at mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: >>> http://www.qsl.net/donate.html >> >> -- >> Richard Knoppow >> 1oldlens1 at ix.netcom.com >> WB6KBL >> >> ______________________________________________________________ >> Kenwood mailing list >> Home: http://mailman.qth.net/mailman/listinfo/kenwood >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Kenwood at mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: >> http://www.qsl.net/donate.html > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html -- Richard Knoppow 1oldlens1 at ix.netcom.com WB6KBL From ken.d.brown at hawaiiantel.net Fri Jul 10 15:41:29 2020 From: ken.d.brown at hawaiiantel.net (ken.d.brown at hawaiiantel.net) Date: Fri, 10 Jul 2020 08:41:29 -1100 Subject: [Kenwood] Matching transformer for mike In-Reply-To: <88089682-67f9-d859-32aa-e9499cac0f48@ix.netcom.com> References: <07922914-cd45-f9b9-090f-ab7657abfffc@gmail.com> <74C6AC46EE134DE1B831EA8F7259D196@HAL2000> <50189E776644423283590F3C5C6ED310@HAL2000> <88089682-67f9-d859-32aa-e9499cac0f48@ix.netcom.com> Message-ID: If the mic audio sounds good on the headphone output of the compressor then you need to focus on getting the output level into the radio mic input right. As Richard said an attenuator should do the trick. No need for a transformer. There are many versions of resistor network attenuators you could use. Some google searches on T pad, L pad, pi pad should turn up some information on resistor values needed for the amount of attenuation necessary. How much do you need? Depends on the output level specs of the device and in the input level specs of the transmitter. Attenuator resistor value data will be be dependent on impedance, I suggest using 600 ohm impedance values. Impedance matching is not super important here though. Radio's mic input impedance is probably in the kOhms. If you like use a 600 Ohm shunt on the output of the attenuator. Or you could just use a potentiometer as a voltage divider. Maybe a 10 kOhm pot. Once you determine a setting that works by experimentation replace the pot with fixed value resistors. You may also want to try using only a 50 Ohm termination (dummy load) for the transmitter to see whether RF getting into the device is a problem. Using the termination instead of your antenna system should reduce any RF feedback problem. If you determine that RF feedback is a problem then you need to figure out how to stop it. DE N6KB On 2020-07-10 07:45, Richard Knoppow wrote: > That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it? If not check BAMA. > You should not need a transformer for it on either input or output sides. > There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era. > > On 7/10/2020 3:54 AM, Steve H wrote: Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output > from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm > and artifacts from the signal. > > This is the mike I am now using: > https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great. > > But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable. > > So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however > as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all. > > Steve Hearns > KA2PTE > > ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com> > To: > Sent: Thursday, July 09, 2020 11:18 PM > Subject: Re: [Kenwood] Matching transformer for mike > > Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance. > In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not. > See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical. > > On 7/9/2020 7:53 PM, Steve H wrote: I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms > to the rigg and the processors output is 600 ohms. > > Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids? > > Steve Hearns > KA2PTE > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Richard Knoppow > 1oldlens1 at ix.netcom.com > WB6KBL > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Kenwood mailing list Home: http://mailman.qth.net/mailman/listinfo/kenwood Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Kenwood at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html From k3ac at aol.com Fri Jul 10 16:08:07 2020 From: k3ac at aol.com (Robert Needleman) Date: Fri, 10 Jul 2020 16:08:07 -0400 Subject: [Kenwood] Fwd: Matching transformer for mike References: Message-ID: <51BA73DE-9305-4F49-92C8-F1B7D4EFAC30@aol.com> Sent from my iPhone Begin forwarded message: > From: Robert Needleman > Date: July 10, 2020 at 4:05:33 PM EDT > To: Richard Knoppow <1oldlens1 at ix.netcom.com> > Subject: Re: [Kenwood] Matching transformer for mike > > ?Any good dynamic mike (LO Z) should work fine on the 830. And no need for phantom power or a matching transformer. I have used an Kenwood MC-60 with good results on my 830 and my current favorite dynamic is a Heil PR-781 that has plenty of punch and is more affordable than the high end dynamics like the PR-40 and ?super hot? EV RE-27N/D. > Bob K3AC > > Sent from my iPhone > >> On Jul 10, 2020, at 2:51 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote: >> >> ? That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it? If not check BAMA. >> You should not need a transformer for it on either input or output sides. >> There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era. >> >>>> On 7/10/2020 3:54 AM, Steve H wrote: >>> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output >>> from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm >>> and artifacts from the signal. >>> >>> This is the mike I am now using: >>> https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 >>> >>> Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great. >>> >>> But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable. >>> >>> So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however >>> as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all. >>> >>> Steve Hearns >>> KA2PTE >>> >>> ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com> >>> To: >>> Sent: Thursday, July 09, 2020 11:18 PM >>> Subject: Re: [Kenwood] Matching transformer for mike >>> >>> >>>> Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance. >>>> In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not. >>>> See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical. >>>> >>>> On 7/9/2020 7:53 PM, Steve H wrote: >>>>> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms >>>>> to the rigg and the processors output is 600 ohms. >>>>> >>>>> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids? >>>>> >>>>> Steve Hearns >>>>> KA2PTE >>>>> >>>>> ______________________________________________________________ >>>>> Kenwood mailing list >>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>>>> Help: http://mailman.qth.net/mmfaq.htm >>>>> Post: mailto:Kenwood at mailman.qth.net >>>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>> >>>> -- >>>> Richard Knoppow >>>> 1oldlens1 at ix.netcom.com >>>> WB6KBL >>>> >>>> ______________________________________________________________ >>>> Kenwood mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:Kenwood at mailman.qth.net >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> ______________________________________________________________ >>> Kenwood mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Kenwood at mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> >> -- >> Richard Knoppow >> 1oldlens1 at ix.netcom.com >> WB6KBL >> >> ______________________________________________________________ >> Kenwood mailing list >> Home: http://mailman.qth.net/mailman/listinfo/kenwood >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Kenwood at mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html From k3ac at aol.com Fri Jul 10 17:22:38 2020 From: k3ac at aol.com (k3ac at aol.com) Date: Fri, 10 Jul 2020 21:22:38 +0000 (UTC) Subject: [Kenwood] Fwd: Matching transformer for mike References: <153673714.5660107.1594416158831.ref@mail.yahoo.com> Message-ID: <153673714.5660107.1594416158831@mail.yahoo.com> And if you're on a budget, the Behringer Ultravoice XM8500 dynamic cardioid mike is a 'sleeper' and? will sound great on the 830. It can be had brand new for under $35 on Amazon. It takes a standard 3-pin XLR professional type mike plug,? so you'll need to wire up a 3-Pin XLR cable from the mike to a 4-pin Kenwood mike plug for the 830. Bob K3AC In a message dated 7/10/2020 4:10:00 PM Eastern Standard Time, kenwood at mailman.qth.net writes: Sent from my iPhone Begin forwarded message: > From: Robert Needleman > Date: July 10, 2020 at 4:05:33 PM EDT> To: Richard Knoppow <1oldlens1 at ix.netcom.com>> Subject: Re:? [Kenwood] Matching transformer for mike>> Any good dynamic mike (LO Z) should work fine on the 830. And no need for phantom power or a matching transformer. I have used an Kenwood MC-60 with good results on my 830 and my current favorite dynamic is a Heil PR-781 that has plenty of punch and is? more affordable than the high end dynamics like the PR-40 and ?super hot? EV RE-27N/D.> Bob K3AC>> Sent from my iPhone>>> On Jul 10, 2020, at 2:51 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:>>>> ? That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it?? If not check BAMA.>>? You should not need a transformer for it on either input or output sides.>>? There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era.>>>>>> On 7/10/2020 3:54 AM, Steve H wrote:>>> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output>>> from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm>>> and artifacts from the signal.>>>>>> This is the mike I am now using:>>> https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 >>>>>> Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great.>>>>>> But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable.>>>>>> So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however>>> as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all.>>>>>> Steve Hearns>>> KA2PTE>>>>>> ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>>>> To: >>> Sent: Thursday, July 09, 2020 11:18 PM>>> Subject: Re: [Kenwood] Matching transformer for mike>>>>>>>>>> Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance.>>>> In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not.>>>> See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical.>>>>>>>> On 7/9/2020 7:53 PM, Steve H wrote:>>>>> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms>>>>> to the rigg and the processors output is 600 ohms.>>>>>>>>>> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids?>>>>>>>>>> Steve Hearns>>>>> KA2PTE>>>>>>>>>> ______________________________________________________________>>>>> Kenwood mailing list>>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>>> Help: http://mailman.qth.net/mmfaq.htm>>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>>>> This list hosted by: http://www.qsl.net>>>>> Please help support this email list: http://www.qsl.net/donate.html>>>>>>>> -->>>> Richard Knoppow>>>> 1oldlens1 at ix.netcom.com>>>> WB6KBL>>>>>>>> ______________________________________________________________>>>> Kenwood mailing list>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>> Help: http://mailman.qth.net/mmfaq.htm>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>> This list hosted by: http://www.qsl.net>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> ______________________________________________________________>>> Kenwood mailing list>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>> Help: http://mailman.qth.net/mmfaq.htm>>> Post: mailto:Kenwood at mailman.qth.net>>>>>> This list hosted by: http://www.qsl.net>>> Please help support this email list: http://www.qsl.net/donate.html>>>> -->> Richard Knoppow>> 1oldlens1 at ix.netcom.com>> WB6KBL>>>> ______________________________________________________________>> Kenwood mailing list>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>> Help: http://mailman.qth.net/mmfaq.htm>> Post: mailto:Kenwood at mailman.qth.net>>>> This list hosted by: http://www.qsl.net>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________Kenwood mailing listHome: http://mailman.qth.net/mailman/listinfo/kenwoodHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Kenwood at mailman.qth.net This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html From n3eta at coastside.net Fri Jul 10 19:34:02 2020 From: n3eta at coastside.net (Ron Genovesi) Date: Fri, 10 Jul 2020 16:34:02 -0700 Subject: [Kenwood] Matching transformer for mike In-Reply-To: <51BA73DE-9305-4F49-92C8-F1B7D4EFAC30@aol.com> References: <51BA73DE-9305-4F49-92C8-F1B7D4EFAC30@aol.com> Message-ID: Once again You do know your posting this on the Kenwood 890 site right? Ron Genovesi n3eta at coastside.net > On Jul 10, 2020, at 1:08 PM, Robert Needleman via Kenwood wrote: > > > > Sent from my iPhone > > Begin forwarded message: > >> From: Robert Needleman >> Date: July 10, 2020 at 4:05:33 PM EDT >> To: Richard Knoppow <1oldlens1 at ix.netcom.com> >> Subject: Re: [Kenwood] Matching transformer for mike >> >> ?Any good dynamic mike (LO Z) should work fine on the 830. And no need for phantom power or a matching transformer. I have used an Kenwood MC-60 with good results on my 830 and my current favorite dynamic is a Heil PR-781 that has plenty of punch and is more affordable than the high end dynamics like the PR-40 and ?super hot? EV RE-27N/D. >> Bob K3AC >> >> Sent from my iPhone >> >>> On Jul 10, 2020, at 2:51 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote: >>> >>> ? That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it? If not check BAMA. >>> You should not need a transformer for it on either input or output sides. >>> There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era. >>> >>>>> On 7/10/2020 3:54 AM, Steve H wrote: >>>> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output >>>> from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm >>>> and artifacts from the signal. >>>> >>>> This is the mike I am now using: >>>> https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 >>>> >>>> Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great. >>>> >>>> But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable. >>>> >>>> So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however >>>> as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all. >>>> >>>> Steve Hearns >>>> KA2PTE >>>> >>>> ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com> >>>> To: >>>> Sent: Thursday, July 09, 2020 11:18 PM >>>> Subject: Re: [Kenwood] Matching transformer for mike >>>> >>>> >>>>> Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance. >>>>> In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not. >>>>> See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical. >>>>> >>>>> On 7/9/2020 7:53 PM, Steve H wrote: >>>>>> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms >>>>>> to the rigg and the processors output is 600 ohms. >>>>>> >>>>>> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids? >>>>>> >>>>>> Steve Hearns >>>>>> KA2PTE >>>>>> >>>>>> ______________________________________________________________ >>>>>> Kenwood mailing list >>>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>>>>> Help: http://mailman.qth.net/mmfaq.htm >>>>>> Post: mailto:Kenwood at mailman.qth.net >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>> >>>>> -- >>>>> Richard Knoppow >>>>> 1oldlens1 at ix.netcom.com >>>>> WB6KBL >>>>> >>>>> ______________________________________________________________ >>>>> Kenwood mailing list >>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>>>> Help: http://mailman.qth.net/mmfaq.htm >>>>> Post: mailto:Kenwood at mailman.qth.net >>>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>> >>>> ______________________________________________________________ >>>> Kenwood mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:Kenwood at mailman.qth.net >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> -- >>> Richard Knoppow >>> 1oldlens1 at ix.netcom.com >>> WB6KBL >>> >>> ______________________________________________________________ >>> Kenwood mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/kenwood >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Kenwood at mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From n3eta at coastside.net Fri Jul 10 19:34:31 2020 From: n3eta at coastside.net (Ron Genovesi) Date: Fri, 10 Jul 2020 16:34:31 -0700 Subject: [Kenwood] Fwd: Matching transformer for mike In-Reply-To: <153673714.5660107.1594416158831@mail.yahoo.com> References: <153673714.5660107.1594416158831.ref@mail.yahoo.com> <153673714.5660107.1594416158831@mail.yahoo.com> Message-ID: <85B309A1-53CE-40C6-AD03-0ECE7867FE2D@coastside.net> Once again You do know your posting this on the Kenwood 890 site right? Ron Genovesi n3eta at coastside.net > On Jul 10, 2020, at 2:22 PM, Bob via Kenwood wrote: > > And if you're on a budget, the Behringer Ultravoice XM8500 dynamic cardioid mike is a 'sleeper' and will sound great on the 830. It can be had brand new for under $35 on Amazon. It takes a standard 3-pin XLR professional type mike plug, so you'll need to wire up a 3-Pin XLR cable from the mike to a 4-pin Kenwood mike plug for the 830. > > Bob K3AC > In a message dated 7/10/2020 4:10:00 PM Eastern Standard Time, kenwood at mailman.qth.net writes: > > > > Sent from my iPhone > Begin forwarded message: >> From: Robert Needleman > Date: July 10, 2020 at 4:05:33 PM EDT> To: Richard Knoppow <1oldlens1 at ix.netcom.com>> Subject: Re: [Kenwood] Matching transformer for mike>> Any good dynamic mike (LO Z) should work fine on the 830. And no need for phantom power or a matching transformer. I have used an Kenwood MC-60 with good results on my 830 and my current favorite dynamic is a Heil PR-781 that has plenty of punch and is more affordable than the high end dynamics like the PR-40 and ?super hot? EV RE-27N/D.> Bob K3AC>> Sent from my iPhone>>> On Jul 10, 2020, at 2:51 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:>>>> That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it? If not check BAMA.>> You should not need a transformer for it on either input or output sides.>> There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era.>>>>>> On 7/10/2020 3:54 AM, Steve H wrote:>>> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output>>> from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm>>> and artifacts from the signal.>>>>>> This is the mike I am now using:>>> https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 >>>>>> Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great.>>>>>> But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable.>>>>>> So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however>>> as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all.>>>>>> Steve Hearns>>> KA2PTE>>>>>> ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>>>> To: >>> Sent: Thursday, July 09, 2020 11:18 PM>>> Subject: Re: [Kenwood] Matching transformer for mike>>>>>>>>>> Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance.>>>> In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not.>>>> See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical.>>>>>>>> On 7/9/2020 7:53 PM, Steve H wrote:>>>>> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms>>>>> to the rigg and the processors output is 600 ohms.>>>>>>>>>> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids?>>>>>>>>>> Steve Hearns>>>>> KA2PTE>>>>>>>>>> ______________________________________________________________>>>>> Kenwood mailing list>>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>>> Help: http://mailman.qth.net/mmfaq.htm>>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>>>> This list hosted by: http://www.qsl.net>>>>> Please help support this email list: http://www.qsl.net/donate.html>>>>>>>> -->>>> Richard Knoppow>>>> 1oldlens1 at ix.netcom.com>>>> WB6KBL>>>>>>>> ______________________________________________________________>>>> Kenwood mailing list>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>> Help: http://mailman.qth.net/mmfaq.htm>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>> This list hosted by: http://www.qsl.net>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> ______________________________________________________________>>> Kenwood mailing list>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>> Help: http://mailman.qth.net/mmfaq.htm>>> Post: mailto:Kenwood at mailman.qth.net>>>>>> This list hosted by: http://www.qsl.net>>> Please help support this email list: http://www.qsl.net/donate.html>>>> -->> Richard Knoppow>> 1oldlens1 at ix.netcom.com>> WB6KBL>>>> ______________________________________________________________>> Kenwood mailing list>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>> Help: http://mailman.qth.net/mmfaq.htm>> Post: mailto:Kenwood at mailman.qth.net>>>> This list hosted by: http://www.qsl.net>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________Kenwood mailing listHome: http://mailman.qth.net/mailman/listinfo/kenwoodHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Kenwood at mailman.qth.net > This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From brad.mugleston at comcast.net Sat Jul 11 00:19:56 2020 From: brad.mugleston at comcast.net (Brad Mugleston) Date: Fri, 10 Jul 2020 22:19:56 -0600 Subject: [Kenwood] Fwd: Matching transformer for mike In-Reply-To: <85B309A1-53CE-40C6-AD03-0ECE7867FE2D@coastside.net> References: <85B309A1-53CE-40C6-AD03-0ECE7867FE2D@coastside.net> Message-ID: <9AC5F355-DAAC-4FEC-B9A7-26EE87A0DDA9@comcast.net> Actually I think it?s just the Kenwood site and not just the 890 site DE KI0OT Sent from my iPad > On Jul 10, 2020, at 5:34 PM, Ron Genovesi wrote: > > ?Once again > You do know your posting this on the Kenwood 890 site right? > > > Ron Genovesi > n3eta at coastside.net > > > > > >> On Jul 10, 2020, at 2:22 PM, Bob via Kenwood wrote: >> >> And if you're on a budget, the Behringer Ultravoice XM8500 dynamic cardioid mike is a 'sleeper' and will sound great on the 830. It can be had brand new for under $35 on Amazon. It takes a standard 3-pin XLR professional type mike plug, so you'll need to wire up a 3-Pin XLR cable from the mike to a 4-pin Kenwood mike plug for the 830. >> >> Bob K3AC >> In a message dated 7/10/2020 4:10:00 PM Eastern Standard Time, kenwood at mailman.qth.net writes: >> >> >> >> Sent from my iPhone >> Begin forwarded message: >>> From: Robert Needleman > Date: July 10, 2020 at 4:05:33 PM EDT> To: Richard Knoppow <1oldlens1 at ix.netcom.com>> Subject: Re: [Kenwood] Matching transformer for mike>> Any good dynamic mike (LO Z) should work fine on the 830. And no need for phantom power or a matching transformer. I have used an Kenwood MC-60 with good results on my 830 and my current favorite dynamic is a Heil PR-781 that has plenty of punch and is more affordable than the high end dynamics like the PR-40 and ?super hot? EV RE-27N/D.> Bob K3AC>> Sent from my iPhone>>> On Jul 10, 2020, at 2:51 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:>>>> That makes sense because the line output is at a much higher level. There should be specs fro this thing. Do you have an instruction book for it? If not check BAMA.>> You should not need a transformer for it on either input or output sides.>> There is much confusion about microphone impedance partly because the conventional spec is for the microphone as a source impedance and partly because its not very consistent. The American system is to state the source impedance of the mic. The input to the amplifier being much higher. The British also give mic impedance as a source but assume the amplifier provides a termination. The BBC published a technical note justifying this method but it seems to be that it lowers signal to noise by 6db and is not a good method. For microphones with internal amplifiers, which includes all condenser and electret mics, the impedance is generally of little consequence. Level is important. High impedance mics generally put out more voltage. The use of a transformer in old equipment was primarily to increase the voltage at the amplifier input. I am not sure what the practice is now, much of the terminology was established in the vacuum tube era.>>>>>> On 7/10/2020 3:54 AM, Steve H wrote:>>> Thanks Rich, yes, its got a mike and line level option and inside the compressor on the main board there is a switch that changes the output>>> from line or mike. I was told to put that into the mike position, which I did, and it made a huge difference and eliminated alot of humm>>> and artifacts from the signal.>>>>>> This is the mike I am now using:>>> https://www.newark.com/stellar-labs/cm-2250/studio-condenser-cardioid-microphone/dp/53Y1921 >>>>>> Since its designed around needing phantom power, and the 528E can supply it, figured it was a good match. When I tried it with just my headphones monitoring the output of the compressor, it really did sound great.>>>>>> But no matter what I did last night with it set like that, could not get a whole lot of modulation into the Kenwood where it was an upgrade over the MC50 Kenwood mike. If I put the mike gain on the Kenwood past 3, I get lots of distorting and oscillations without even speaking into the mike. I can cut the mike gain control or the main level out from the 528E down to eliminate it, but at the cost of the percent modulation decreasing way down so its nearly unreadable.>>>>>> So far the MC50 mike sounds way better than what I can get from this setup and it seems like more mike gain would get me more % modulation, however>>> as I get it better and hit 3, it just distorts. If I put the Kenwoods built in compressor on, I can get past 3 and modulation will improve as I go up, but even with the mike gain at max, the modulation % is just not very robust at all.>>>>>> Steve Hearns>>> KA2PTE>>>>>> ----- Original Message ----- From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>>>> To: >>> Sent: Thursday, July 09, 2020 11:18 PM>>> Subject: Re: [Kenwood] Matching transformer for mike>>>>>>>>>> Level are important. If the output level of the processor is high you need a resistive attenuator which will also serve to match the impedance.>>>> In general, American practice is to state microphone input impedance as the expected source impedance, usually there is no need to match impedances because the source is a voltage source not a power source. For instance, in historical broadcast equipment and sound equipment designed to work from low impedance microphones the the typical input impedance was on the order of 5K ohms or more while the source impedance was on the order of 150 ohms. For equipment that runs at line level the impedance is usually a terminating impedance, source impedance can be the same or sometimes not.>>>> See if the processor is meant to drive a microphone input or a line level input. If a line level input you need an attenuator to get the level down to mic level, maybe as much as thirty db. The exact impedance is not critical.>>>>>>>> On 7/9/2020 7:53 PM, Steve H wrote:>>>>> I am trying to hook up a Symetrix 528E voice processor to my Kenwood Hybrid 830S and was told that the mike input is about 150 ohms>>>>> to the rigg and the processors output is 600 ohms.>>>>>>>>>> Other hams I think use a matching transformer, I guess 4 to 1? Anyone out there have any experience selecting a matching xfmr for the Hybrids?>>>>>>>>>> Steve Hearns>>>>> KA2PTE>>>>>>>>>> ______________________________________________________________>>>>> Kenwood mailing list>>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>>> Help: http://mailman.qth.net/mmfaq.htm>>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>>>> This list hosted by: http://www.qsl.net>>>>> Please help support this email list: http://www.qsl.net/donate.html>>>>>>>> -->>>> Richard Knoppow>>>> 1oldlens1 at ix.netcom.com>>>> WB6KBL>>>>>>>> ______________________________________________________________>>>> Kenwood mailing list>>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>>> Help: http://mailman.qth.net/mmfaq.htm>>>> Post: mailto:Kenwood at mailman.qth.net>>>>>>>> This list hosted by: http://www.qsl.net>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> ______________________________________________________________>>> Kenwood mailing list>>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>>> Help: http://mailman.qth.net/mmfaq.htm>>> Post: mailto:Kenwood at mailman.qth.net>>>>>> This list hosted by: http://www.qsl.net>>> Please help support this email list: http://www.qsl.net/donate.html>>>> -->> Richard Knoppow>> 1oldlens1 at ix.netcom.com>> WB6KBL>>>> ______________________________________________________________>> Kenwood mailing list>> Home: http://mailman.qth.net/mailman/listinfo/kenwood>> Help: http://mailman.qth.net/mmfaq.htm>> Post: mailto:Kenwood at mailman.qth.net>>>> This list hosted by: http://www.qsl.net>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________Kenwood mailing listHome: http://mailman.qth.net/mailman/listinfo/kenwoodHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Kenwood at mailman.qth.net >> This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html >> ______________________________________________________________ >> Kenwood mailing list >> Home: http://mailman.qth.net/mailman/listinfo/kenwood >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Kenwood at mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Kenwood mailing list > Home: http://mailman.qth.net/mailman/listinfo/kenwood > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Kenwood at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html From kb4vwa at gmail.com Sat Jul 18 10:32:00 2020 From: kb4vwa at gmail.com (Ed Figueroa) Date: Sat, 18 Jul 2020 10:32:00 -0400 Subject: [Kenwood] TS-940S Message-ID: I live in Murphy, NC. and looking for someone within 100 miles that can fix my TS-940S, which has Phase-lock display issues. When the unit is turned on, it will not RX/TX. Thanks 73's Ed - kb4vwa From kenw8ek at gmail.com Fri Jul 31 19:55:03 2020 From: kenw8ek at gmail.com (Ken, W8EK) Date: Fri, 31 Jul 2020 19:55:03 -0400 Subject: [Kenwood] Mics, Cables, Crystals, and more FS Message-ID: <2867b737-dcbc-8435-3f21-51a0a728e7cb@gmail.com> Microphones, Mic Cables, Crystals, Phone Patch, cable for switching linear amp, boxes, and more For Sale: . Kenwood MC-85 Desk Microphone: The Kenwood MC-85 is a unidirectional electret condenser desk mic, with preamp. It features UP-DOWN tuning (on compatible Kenwood transceivers) and has a level meter. The MC-85 can handle up to three inputs with additional cables. It comes with one cable that is terminated in a round 8 pin connector, wired for Kenwood. This mic requires power that is derived from some Kenwood models. The 700 ohm mic has a 300 to 7000 Hz response. This one works OK, sounds fine, and looks OK. Buy it with paper work for only $90. . Hand Microphone with round 8 pin plug: This hand mic works great on most Kenwood rigs with the round 8 pin connector, such as the TS-440, TM-241, TM-2530, TW-4000, and others, including Alinco and ADI. It says "Electret Condenser Mic" on the back. Basically, this mic functions like an MC-43, with a couple more features. It has the mic and PTT switch; it also has up/down switches on the top. There are four "extra" buttons labeled Call, VFO, MR, and PF. What these four buttons do depends on the rig. There is also a "Lock" switch on the back. Being this is an electret mic, it needs 8 V DC polarizing voltage at the mic connector. Regardless if you use the four extra buttons or not, you still have a mic that works like an MC-43. This mic works fine, and looks like new. It probably came with a rig, and was immediately put in the drawer, and never used. $30 . Microphone Cables for Heil and TenTec Mics: These cables can be used with the TenTec Regal 707, or with many of the Heil microphones (all of them that use an XLR-4 connector, which is most of them), and likely others. XLR-4 to round 8 pin connector wired for Kenwood, about 8 feet long. $25 XLR-4 to round 8 pin connector wired for TenTec/Yaesu, about 8 feet long. $25 . 10 meter Crystals for Kenwood HF Rigs For Sale: These crystals work in the Kenwood TS-820 for sure (they have been tested in a TS-820), and probably will also work in most of the other Kenwood "Hybrid" rigs. Please check your manual. Set of three crystals These crystals will restore all three 10 meter segments. They are used after someone "converted" your rig to 11 meters, and you would like it back on 10 meters. They simply plug in, so no difficult surgery is needed. $39 for the set of three. . Kenwood PC-1 Phone Patch For Sale: The Kenwood PC-1 phone patch provides a connection between the transceiver and a telephone line. It is designed to provide high isolation between receiver input and transmitter output. Impedance levels (nominal): Line 600 ohm Receiver Input 8 ohms Speaker Output 8 ohms Microphone 50k ohms Microphone input and output is 4 pin. 6 x 2.25 x 5.75 inches. This one works fine and looks fine. Only $25. . Linear Amp Switching Cables for Kenwood Rigs: This cable goes from a Kenwood transceiver to a linear amplifier to switch the amp from transmit to receive. One end has a DIN connector, as is used with most Kenwood rigs. The other end has an RCA phono plug, as used by most linear amplifiers. Before using this cable, please check the switching capabilities of your transceiver, and the requirements of your amplifier. Cable for switching the T/R relay Only $15. Cable for switching T/R relay with additional ALC cable $20 . Original Boxes All are original boxes that also include the inserts that came with them when new. Some may even have plastic bags. Kenwood FM-430 FM Unit $3 Kenwood MB-4 Mounting Brack $3 Kenwood MC-30 Mic $4 Kenwood MC-80 Desk Mic $8 Kenwood PB-2 Battery $3 Kenwood PB-21 Battery $3 Kenwood PB-24 Battery Pack $3 Kenwood SMC-25 Spkr Mic $3 Kenwood TH-22, 2 m HT $12 Kenwood TM-221, 2 m Xcvr $10 Kenwood TU-79 PL unit $3 Kenwood TS-711 VHF Xcvr $15* Kenwood UBZ-LF14 FM Xcvr $5 Kenwood VS-1 Voice Synth $3 * indicates no insert These are original boxes only. . I also have many other accessories available such as many different types of microphones, HTs, VHF and UHF rigs, HF and VHF/UHF antennas, connectors, miscellaneous accessories, etc. Just too many to list here. Please e-mail your requests. . Prices do not include shipping from Florida. Thanks. 73, Ken, W8EK Ken Simpson E-mail to W8EK at FLHam.net or W8EK at arrl.net Voice Phone (352) 732-8400 . .