[Lowfer] Lowfer KE

[KA4SEY]

Ok that's good to know. Hopefully I will get to do that later. I forgot about that too, when you take the antenna to different taps, what do you do with the antenna output wire and the end of the coil?KaseySent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: John Hamer <wilbur0611 at gmail.com> Date: 11/22/20  10:20 AM  (GMT-05:00) To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net> Subject: Re: [Lowfer] Lowfer KE Kasey,Ohh, yeah,  you don't need to tre the 24v until you get the newconfiguration.Regards,John HamerLowfer JHOn Sun, Nov 22, 2020, 10:17 AM KA4SEY <ka4sey at gmail.com> wrote:> No the original setup.>> On Sun, Nov 22, 2020, 10:13 AM John Hamer <wilbur0611 at gmail.com> wrote:>> > Kasey,> >> > Are you using the new loading coil configuration?> >> > Regards,> > John Hamer> > Lowfer JH> >> > On Sun, Nov 22, 2020, 10:07 AM KA4SEY <ka4sey at gmail.com> wrote:> >> > > John,Glad you could get it going, I'm messing around with 13.8 and 24> > > volts and 13.8 seem s to work better? Now sure why but on 24 it draws> > 20ma> > > and on 13.8 it draws 40ma. At 13.8 it also has a stronger signal here> at> > > the house. Not sure if that's overloading it or what.KaseySent from my> > > Verizon, Samsung Galaxy smartphone> > > -------- Original message --------From: John Hamer <> wilbur0611 at gmail.com> > >> > > Date: 11/22/20  9:53 AM  (GMT-05:00) To: "Discussion of the Lowfer (US,> > > European, & UK) and MedFer bands" <lowfer at mailman.qth.net> Subject:> Re:> > > [Lowfer] Lowfer KE Kasey,That sounds good.  You are going to need the> 24v> > > to get 1 watt with thatconfiguration. I think it will work better for> > you.> > > It made a bigdifference for me. The new computer is working well.  I> have> > > been going through windowsupdates for hours because it has been off for> > > years,  but it's almostthere.RegardsJohn HamerLowfer JHOn Sun, Nov 22,> > > 2020, 9:48 AM KA4SEY <ka4sey at gmail.com> wrote:> Hey John, how is your> > > computer setup doing? I meant to tell you, I took> the LPF out and both> > > transistor are doing good. I put a 10W 50 ohm resistor> from the output> > to> > > ground and supplied 24v to the circuit and got 75ma to> the finals. It> > was> > > putting out a whopping 1.8 watts! The resistor even got> got. I'm> > excited!> > > Now with it out of line and back at the antenna it's on a> 13.8v power> > > supply with the same configuration and I was getting 35ma to> the> > finals. I> > > believe that's about 450mw. But looking at the signal here on> the> radio> > > it's much stronger. I even picked the tub up and sat a milk crate>> under> > it> > > and now it's a strong 20 over. So both of those helped. I will try> the> > > configuration you told me to try today and see how that goes. I might>> > try> > > the thing on 24 volts and see if the signal increases.KaseySent from> my>> > > Verizon, Samsung Galaxy smartphone> -------- Original message> > --------From:> > > John Hamer <wilbur0611 at gmail.com>> Date: 11/22/20  9:38 AM> (GMT-05:00)> > > To: "Discussion of the Lowfer (US,> European, & UK) and MedFer bands" <> > > lowfer at mailman.qth.net> Subject: Re:> [Lowfer] Lowfer KE I Believe he> > has> > > the capacitors on the oscillator and> they are just not onthe schematic> > he> > > posted.  I went through datasheet with> him over the summerand> calculated> > > the proper capacitor values.RegardsJohn> HamerLowfer JHOn Sun, Nov 22,> > > 2020, 9:28 AM KA4SEY <ka4sey at gmail.com>> wrote:> Thank you John, I> will> > > add those capacitors on in the future and> make any> other changes.> Like> > I> > > said I'm going to try another configuration> with the> coil today to> see> > if> > > it will do any better. I will hopefully find> an> ammeter which would> > help> > > me a lot. Thanks againKaseySent from my> Verizon,> Samsung Galaxy> > > smartphone> -------- Original message> --------From: J D <> > > listread at lwca.org> Date:> 11/22/20  2:27 AM> (GMT-05:00) To:> > > lowfer at mailman.qth.net Subject: Re:> [Lowfer] Lowfer KE> Kasey, it> would> > > appear from your schematic that a few> components may be> missing,> > thereby> > > preventing your oscillator from being as> stable as it> needs to be.> This> > > same situation is found in a commercially> made sorta-kit> rig for 22> > > meters, and beacons using it there can often be> identified by> their> > > tendency to wander or even outright jump around in> frequency from> day> > to> > > day.A Pierce oscillator needs capacitance from both> legs of the>> crystal> > > to ground as part of a phase shift network. There is> stray>> capacitance> > > present, of course, without which it would not oscillate> at> all; but> > that> > > is neither of sufficient magnitude nor stability to ensure>> reliable> > > oscillation at the design frequency of the crystal. A good>> starting> > value> > > for capacitors for a typical 3 MHz parallel resonant> crystal> would be> > 27> > > pF each.In addition, there n>  eeds to be a series> resistor between> pin> > 10> > > and the crystal. It serves> three functions that> each affect frequency> > > stability to a certain extent:> it isolates the> crystal somewhat from> > the> > > complex impedance of the gate> output, it limits> current and thereby> > power> > > dissipation in the crystal, and> it is part of> the phase delay> network.> > As> > > a rough first approximation, I'd> suggest 1 K,> maybe as high as 2.2> > > K.Finally, the shunt resistance across> the crystal> could be a little> > > higher in value for 3 MHz operation, such as> 3.3 M to> 4.7 M. It's not> > > terribly critical, but it is preferable to operate> it with> as high a> > > value as will allow for reliable startup. Lowering the> operating> Q of> > the> > > crystal with a low parallel resistance could allow a> crystal to> jump> > too> > > easily between primary resonance and any secondary> resonance> modes it> > may> > > have.These comments are some basic rule of thumb> guidance.> For more> > > detailed treatment of Pierce oscillators implemented> with logic>> gates,> > I> > > believe Crystek s>  till offers this article:>>> > >> >> https://www.crystek.com/documents/appnotes/pierce-gateintroduction.pdfJohn> > >>> > >> >> Davis______________________________________________________________Lowfer>>> > > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp> :>>> > > http://mailman.qth.net/mmfaq.htmPost: mailto:> Lowfer at mailman.qth.netPost> > >>> > > must be less than 50KB total for message plus attachment!This list> > hosted>>> > > by: http://www.qsl.netPlease help support this email list:>>> > > http://www.qsl.net/donate.html>>> > > ______________________________________________________________> Lowfer>> > > mailing list> Home: http://mailman.qth.net/mailman/listinfo/lowfer>> > > Help:> http://mailman.qth.net/mmfaq.htm> Post: mailto:> > > Lowfer at mailman.qth.net>> Post must be less than 50KB total for message> > > plus attachment!>> This list> hosted by: http://www.qsl.net> Please> help> > > support this email list:> http://www.qsl.net/donate.html> > >______________________________________________________________Lowfer>> > > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp:>> > > http://mailman.qth.net/mmfaq.htmPost: mailto:> Lowfer at mailman.qth.netPost>> > > must be less than 50KB total for message plus attachment!This list> > hosted>> > > by: http://www.qsl.netPlease help support this email list:>> > > http://www.qsl.net/donate.html>> > > ______________________________________________________________> Lowfer> > > mailing list> Home: http://mailman.qth.net/mailman/listinfo/lowfer>> > Help:> > > http://mailman.qth.net/mmfaq.htm> Post: mailto:Lowfer at mailman.qth.net>> > > Post must be less than 50KB total for message plus attachment!>> This> > list> > > hosted by: http://www.qsl.net> Please help support this email list:> > >> >> http://www.qsl.net/donate.html______________________________________________________________Lowfer> > > mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp:> > > http://mailman.qth.net/mmfaq.htmPost: mailto:> Lowfer at mailman.qth.netPost> > > must be less than 50KB total for message plus attachment!This list> hosted> > > by: http://www.qsl.netPlease help support this email list:> > > http://www.qsl.net/donate.html> > > ______________________________________________________________> > > Lowfer mailing list> > > Home: http://mailman.qth.net/mailman/listinfo/lowfer> > > Help: http://mailman.qth.net/mmfaq.htm> > > Post: mailto:Lowfer at mailman.qth.net> > > Post must be less than 50KB total for message plus attachment!> > >> > > This list hosted by: http://www.qsl.net> > > Please help support this email list: http://www.qsl.net/donate.html> > ______________________________________________________________> > Lowfer mailing list> > Home: http://mailman.qth.net/mailman/listinfo/lowfer> > Help: http://mailman.qth.net/mmfaq.htm> > Post: mailto:Lowfer at mailman.qth.net> > Post must be less than 50KB total for message plus attachment!> >> > This list hosted by: http://www.qsl.net> > Please help support this email list: http://www.qsl.net/donate.html> >> ______________________________________________________________> Lowfer mailing list> Home: http://mailman.qth.net/mailman/listinfo/lowfer> Help: http://mailman.qth.net/mmfaq.htm> Post: mailto:Lowfer at mailman.qth.net> Post must be less than 50KB total for message plus attachment!>> This list hosted by: http://www.qsl.net> Please help support this email list: http://www.qsl.net/donate.html>______________________________________________________________Lowfer mailing listHome: http://mailman.qth.net/mailman/listinfo/lowferHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Lowfer at mailman.qth.netPost must be less than 50KB total for message plus attachment!This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html