[Elecraft] Elecraft Digest, Vol 249, Issue 27
Pentti A J Pajunen
OH2CG at kolumbus.fi
Thu Jan 30 13:09:48 EST 2025
Did anybody sa: Chack what antenna in use
> elecraft-request at mailman.qth.net kirjoitti 28.1.2025 kello 19.00:
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> Today's Topics:
>
> 1. K3 doesn't receive (n0tt1 at juno.com)
> 2. Re: K3 doesn't receive (Rick nk7i)
> 3. Re: K3 doesn't receive (David Hachadorian)
> 4. Re: K3 doesn't receive (Bill Hammond)
> 5. KAT3 vs KAT3A in K3S (Samir Popaja)
> 6. Re: K3 doesn't receive (CG)
> 7. Re: Elecraft CW Net Report (eckhart.neumann at icloud.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 27 Jan 2025 15:31:18 -0600
> From: <n0tt1 at juno.com>
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] K3 doesn't receive
> Message-ID: <AABV3R9A3APVTZ4A at smtpout02.vgs.untd.com>
> Content-Type: text/plain; charset=us-ascii
>
> Hi Gents,
>
> My K3 has a problem and it's intermittent. Maybe someone
> has had the same issue and knows of a possible remedy.
> Here are the symptoms:
> 1. Switch on radio. Nothing being received except I can
> hear the neighbor's electric fencer and I can hear *some* "normal"
> powerline noise. NO signals heard on the AM Broadcast Band
> which is very unusual. It's like the signals that need to be
> processed/demodulated aren't.
> 2. Radio doesn't transmit when the no receive problem occurs.
> 3. Turn off radio...
> 4. Turn radio on and everything is normal, sometimes.
> 5. It doesn't seem to matter if the radio is warmed up or not.
> 6. Voltage to the radio is okay at all times.
> 7. Audio out is okay at all times., i.e it isn't totally dead.
> 8. Gently "banging" on the radio doesn't help...connections all
> okay in back of the radio.
> 9. I can hear some noise increase/decrease when the RX pre-amp
> is switched in/out.
> 10. The attached P3 sometimes won't update either when the freq
> is changed...recycle the K3's power switch and then all okay
> with the P3....might be a separate issue.
> 11. Other bands have the same "no receive" problem.
>
> So...any ideas to help me zero-in on something to check first after
> I open the covers?
>
> Thanks,
> Charlie, N0TT
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 27 Jan 2025 14:08:42 -0800
> From: Rick nk7i <rick.nk7i at gmail.com>
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 doesn't receive
> Message-ID: <9cdfcf85-d55f-4839-b47b-70d4b5b4f883 at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> I suggest the synthesizer/s.? Power off; pop the top; pull and reseat
> it/them.? It/they is/are a small card towards the face of the rig as I
> recall.
>
> Then EACH of the TMP connectors (a slight twist of the CONNECTOR, not
> the wire cable).
>
> There may be some cruft build up after time (small corrosions; flexes
> from heat/cool cycles)...
>
> Then it gets interesting if the problem remains.
>
> 73,
> Rick nk7i
>
>
> On 1/27/2025 1:31 PM, n0tt1 at juno.com wrote:
>> Hi Gents,
>>
>> My K3 has a problem and it's intermittent. Maybe someone
>> has had the same issue and knows of a possible remedy.
>> Here are the symptoms:
>> 1. Switch on radio. Nothing being received except I can
>> hear the neighbor's electric fencer and I can hear *some* "normal"
>> powerline noise. NO signals heard on the AM Broadcast Band
>> which is very unusual. It's like the signals that need to be
>> processed/demodulated aren't.
>> 2. Radio doesn't transmit when the no receive problem occurs.
>> 3. Turn off radio...
>> 4. Turn radio on and everything is normal, sometimes.
>> 5. It doesn't seem to matter if the radio is warmed up or not.
>> 6. Voltage to the radio is okay at all times.
>> 7. Audio out is okay at all times., i.e it isn't totally dead.
>> 8. Gently "banging" on the radio doesn't help...connections all
>> okay in back of the radio.
>> 9. I can hear some noise increase/decrease when the RX pre-amp
>> is switched in/out.
>> 10. The attached P3 sometimes won't update either when the freq
>> is changed...recycle the K3's power switch and then all okay
>> with the P3....might be a separate issue.
>> 11. Other bands have the same "no receive" problem.
>>
>> So...any ideas to help me zero-in on something to check first after
>> I open the covers?
>>
>> Thanks,
>> Charlie, N0TT
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home:http://mailman.qth.net/mailman/listinfo/elecraft
>> Help:http://mailman.qth.net/mmfaq.htm
>> Post:mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by:http://www.qsl.net
>> Please help support this email list:http://www.qsl.net/donate.html
>> Message delivered torick.nk7i at gmail.com
>
> ------------------------------
>
> Message: 3
> Date: Mon, 27 Jan 2025 17:02:18 -0700
> From: David Hachadorian <k6ll.dave at gmail.com>
> To: n0tt1 at juno.com, Reflector Elecraft <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] K3 doesn't receive
> Message-ID: <ffce4ba7-62b8-445a-82c5-48daf7f925ee at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Does your K3 have gold front panel pins?? The older tinned pins caused a
> lot of intermittent problems.? I think the changeover to gold happened
> around serial #5500.
>
> Before I replaced mine with gold, I got so I could remove the front
> panel, spray the tin pins with DeoxIT, and reassemble the radio in under
> 20 minutes. It was like a Wood Brothers NASCAR pit stop.
>
> GL!
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
> On 1/27/2025 2:31 PM, n0tt1 at juno.com wrote:
>> Hi Gents,
>>
>> My K3 has a problem and it's intermittent. Maybe someone
>> has had the same issue and knows of a possible remedy.
>> Here are the symptoms:
>> 1. Switch on radio. Nothing being received except I can
>> hear the neighbor's electric fencer and I can hear *some* "normal"
>> powerline noise. NO signals heard on the AM Broadcast Band
>> which is very unusual. It's like the signals that need to be
>> processed/demodulated aren't.
>> 2. Radio doesn't transmit when the no receive problem occurs.
>> 3. Turn off radio...
>> 4. Turn radio on and everything is normal, sometimes.
>> 5. It doesn't seem to matter if the radio is warmed up or not.
>> 6. Voltage to the radio is okay at all times.
>> 7. Audio out is okay at all times., i.e it isn't totally dead.
>> 8. Gently "banging" on the radio doesn't help...connections all
>> okay in back of the radio.
>> 9. I can hear some noise increase/decrease when the RX pre-amp
>> is switched in/out.
>> 10. The attached P3 sometimes won't update either when the freq
>> is changed...recycle the K3's power switch and then all okay
>> with the P3....might be a separate issue.
>> 11. Other bands have the same "no receive" problem.
>>
>> So...any ideas to help me zero-in on something to check first after
>> I open the covers?
>>
>> Thanks,
>> Charlie, N0TT
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home:http://mailman.qth.net/mailman/listinfo/elecraft
>> Help:http://mailman.qth.net/mmfaq.htm
>> Post:mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by:http://www.qsl.net
>> Please help support this email list:http://www.qsl.net/donate.html
>> Message delivered tok6ll.dave at gmail.com
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 27 Jan 2025 18:18:37 -0600
> From: Bill Hammond <ak5x at me.com>
> To: David Hachadorian <k6ll.dave at gmail.com>
> Cc: n0tt1 at juno.com, Reflector Elecraft <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] K3 doesn't receive
> Message-ID: <95F254E0-1142-45E2-AD9D-E7EC722779E7 at me.com>
> Content-Type: text/plain; charset=utf-8
>
> Things to check:
> Pins if not gold
> D25 and other pin diodes in the QSK circuit.
> The several push function knob circuits, a stuck knob causes very strange issues depending on what is stuck.
> Yes, the internal push in coax jumpers. Reset them all.
>
> After that just normal troubleshooting, checking all internal power circuits first.
>
> 73, Bill AK5X
> Sent from my iPhone
>
>> On Jan 27, 2025, at 6:02?PM, David Hachadorian <k6ll.dave at gmail.com> wrote:
>>
>> ?Does your K3 have gold front panel pins? The older tinned pins caused a lot of intermittent problems. I think the changeover to gold happened around serial #5500.
>>
>> Before I replaced mine with gold, I got so I could remove the front panel, spray the tin pins with DeoxIT, and reassemble the radio in under 20 minutes. It was like a Wood Brothers NASCAR pit stop.
>>
>> GL!
>>
>> Dave Hachadorian, K6LL
>> Yuma, AZ
>>
>>
>>> On 1/27/2025 2:31 PM, n0tt1 at juno.com wrote:
>>> Hi Gents,
>>>
>>> My K3 has a problem and it's intermittent. Maybe someone
>>> has had the same issue and knows of a possible remedy.
>>> Here are the symptoms:
>>> 1. Switch on radio. Nothing being received except I can
>>> hear the neighbor's electric fencer and I can hear *some* "normal"
>>> powerline noise. NO signals heard on the AM Broadcast Band
>>> which is very unusual. It's like the signals that need to be
>>> processed/demodulated aren't.
>>> 2. Radio doesn't transmit when the no receive problem occurs.
>>> 3. Turn off radio...
>>> 4. Turn radio on and everything is normal, sometimes.
>>> 5. It doesn't seem to matter if the radio is warmed up or not.
>>> 6. Voltage to the radio is okay at all times.
>>> 7. Audio out is okay at all times., i.e it isn't totally dead.
>>> 8. Gently "banging" on the radio doesn't help...connections all
>>> okay in back of the radio.
>>> 9. I can hear some noise increase/decrease when the RX pre-amp
>>> is switched in/out.
>>> 10. The attached P3 sometimes won't update either when the freq
>>> is changed...recycle the K3's power switch and then all okay
>>> with the P3....might be a separate issue.
>>> 11. Other bands have the same "no receive" problem.
>>>
>>> So...any ideas to help me zero-in on something to check first after
>>> I open the covers?
>>>
>>> Thanks,
>>> Charlie, N0TT
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home:http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help:http://mailman.qth.net/mmfaq.htm
>>> Post:mailto:Elecraft at mailman.qth.net
>>>
>>> This list hosted by:http://www.qsl.net
>>> Please help support this email list:http://www.qsl.net/donate.html
>>> Message delivered tok6ll.dave at gmail.com
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to ak5x at me.com
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 28 Jan 2025 09:57:12 +0100
> From: Samir Popaja <sm7vzx at gmail.com>
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] KAT3 vs KAT3A in K3S
> Message-ID:
> <CAOvBGYL_NXycLrdxBHkkm4zi=WOJOmkZU3FB2thcfmDsap_BbA at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi,
>
> I'm wondering if KAT3 is OK to put in K3S?
>
> What's the difference between these two?
>
> Thanks in advance.
>
> Samir, sm7vzx
>
>
> ------------------------------
>
> Message: 6
> Date: Tue, 28 Jan 2025 10:03:25 +0100
> From: CG <f1gwr at free.fr>
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 doesn't receive
> Message-ID: <abe43e49-1db1-4683-b6de-012a43d27f49 at free.fr>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Hi Charlie,
>
> I had a similar issue with my K3s (real one - not upgraded K3): 30 dB
> attenuation or so on all received bands. I used a RF generator set to
> -10 dBm (100 micro Watt) connected to the RF input (with microphone
> disconnected to avoid chance transmitting into the generator). And
> traced the signal through the circuits, guided by the available
> schematic, with a high impedance (100 kOhms) RF voltmeter. Finally
> spotted the cause: a dead PIN diode. Replaced the guy and... had a
> cigar! Don't remember the designator, but can retrieve it for you if
> needed (however K3 and K3s may be different, and anyway another PIN
> diode may also be involved).
>
> You didn't tell us if you estimate having sufficient electronic skills
> and/or experience to dig into the rig. And say if you own the described
> equipment; if not you may buy a low cost used generator from the bay or
> a small synthesizer from Amaz or Ali , and make a home-built sniffer
> probe with a Shottky diode + capacitor connected to a low range
> voltmeter, preferably electronic, to track the signal. A min 20-30 MHz
> oscilloscope may also be used.
>
> HTH,
>
> Christian F1GWR
>
>> On 1/27/2025 1:31 PM, n0tt1 at juno.com wrote:
>>> Hi Gents,
>>>
>>> My K3 has a problem and it's intermittent.? Maybe someone
>>> has had the same issue and knows of a possible remedy.
>>> Here are the symptoms:
>>> 1.? Switch on radio.? Nothing being received except I can
>>> ????? hear the neighbor's electric fencer and I can hear *some* "normal"
>>> ????? powerline noise.? NO signals heard on the AM Broadcast Band
>>> ????? which is very unusual.? It's like the signals that need to be
>>> ????? processed/demodulated aren't.
>>> 2.? Radio doesn't transmit when the no receive problem occurs.
>>> 3.? Turn off radio...
>>> 4.? Turn radio on and everything is normal, sometimes.
>>> 5.? It doesn't seem to matter if the radio is warmed up or not.
>>> 6.? Voltage to the radio is okay at all times.
>>> 7.? Audio out is okay at all times., i.e it isn't totally dead.
>>> 8.? Gently "banging" on the radio doesn't help...connections all
>>> ????? okay in back of the radio.
>>> 9.? I can hear some noise increase/decrease when the RX pre-amp
>>> ????? is switched in/out.
>>> 10.? The attached P3 sometimes won't update either when the freq
>>> ??????? is changed...recycle the K3's power switch and then all okay
>>> ??????? with the P3....might be a separate issue.
>>> 11.? Other bands have the same "no receive" problem.
>>>
>>> So...any ideas to help me zero-in on something to check first after
>>> I open the covers?
>>>
>>> Thanks,
>>> Charlie, N0TT
>
>
> ------------------------------
>
> Message: 7
> Date: Tue, 28 Jan 2025 14:05:48 +0100
> From: eckhart.neumann at icloud.com
> To: kevin <kevinr at coho.net>
> Cc: Elecraft Reflector <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] Elecraft CW Net Report
> Message-ID: <826B449D-AD63-4B21-A4F5-42A37D22E2B3 at icloud.com>
> Content-Type: text/plain; charset=utf-8
>
> Hello
>
> Looking for . Elecraft PX3
>
> Eckhart, DK2LJ. Email on qrz,com
>
>> Am 27.01.2025 um 04:05 schrieb kevin <kevinr at coho.net>:
>>
>> Good Evening,
>>
>> Both bands were OK. Moderate QSB on 20 meters, some light QSB on 40 m. Noise was higher on 20 meters by quite a bit. Forty had some. Conditions did not change as much during the net. The sky was still bright when I got done.
>>
>>
>> On 14050.5 kHz at 2300z:
>>
>> W0CZ - Ken - ND
>>
>> NO8V - John - MI
>>
>> K4JPN - Steve - GA
>>
>> WJ7S - John - UT
>>
>> K6XK - Roy - IA
>>
>> K0DTJ - Brian - CA
>>
>> W8OV - Dave - TX
>>
>>
>> On 7047.5 kHz at 0100z:
>>
>> W0CZ - Ken - ND
>>
>> K4TO - Dave - KY
>>
>> K0DTJ - Brian - CA
>>
>> K6PJV - Dale - CA
>>
>> WM5F - Dwight - ID
>>
>>
>> Until next week 73,
>>
>> Kevin. KD5ONS
>>
>>
>>
>>
>> -
>>
>>
>>
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to eckhart.neumann at icloud.com
>
>
> Eckhart Neumann
>
> Psychoanalytiker DGPT
> Sommerfelderstrasse 17a
> 53639 K?nigswinter
>
>
>
>
> ------------------------------
>
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> End of Elecraft Digest, Vol 249, Issue 27
> *****************************************
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