[Kenwood] TS-940S Not Receiving on CW

[Paul Erickson]

Dennis,

Looks like I got it wrong. My problem showed up when I put a CW filter 
in, and when I switched
to the narrow position, there was not output from the filter. Sounds 
like your issue is different.
Sorry I don't have any further ideas.

cheers, Paul - VA7NT

On 10/25/2011 07:06 PM, Dennis Younker NE6I wrote:
> Thanks Paul. I'm curious about that experience. In my case, CW receive is
> not functioning in neither wide or narrow mode. The service manual says wide
> mode uses the 6 kHz wide ceramic filter (AM mode) and the SSB filter (mine
> is the stock 2.7 kHz wide filter). Since my RX is functioning in both SSB
> and AM, it would seem that a solder bridge is not my problem. At least
> that's my reasoning. Thoughts?
>
> CW receive was functional for several years and only stopped working
> recently.
>
> And Bill, having read the service manual again and learning the CW path
> through the filters, it seems to rule out a cold solder joint, at least in
> wide mode. For good measure, I removed the narrow CW filter and reconnected
> the bypass jumper. No joy though.
>
> ----- Original Message -----
> From: "Paul Erickson"<va7nt at telus.net>
> To:<kenwood at mailman.qth.net>
> Sent: Tuesday, October 25, 2011 5:56 PM
> Subject: Re: [Kenwood] TS-940S Not Receiving on CW
>
>
>> Dennis,
>>
>> One other possibility is a solder bridge shorting out the filter
>> connections. I encountered this
>> on one of my 940's a few years ago. Since the 940's are usually not
>> shipped with CW filters
>> this could be missed in the original testing.
>>
>> cheers, Paul - VA7NT
>>
>> On 10/25/2011 05:38 PM, Dennis Younker NE6I wrote:
>>> Hi Bill,
>>>
>>> Actually Ed is helping me out a little. It's me with the TS-940S problem.
>>> I'm going to check on the filter more closely in a day or two. Thanks for
>>> the suggestion on the cold solder joint. I did wiggle it around earlier
>>> but
>>> maybe it's worse than even that would reveal. I'll check it out more
>>> closely.
>>>
>>> --Dennis NE6I
>>>
>>> ----- Original Message -----
>>> From: "Bill Cromwell"<wrcromwell at gmail.com>
>>> To:<kenwood at mailman.qth.net>
>>> Sent: Tuesday, October 25, 2011 11:31 AM
>>> Subject: Re: [Kenwood] TS-940S Not Receiving on CW
>>>
>>>
>>>>> Message: 1
>>>>> Date: Mon, 24 Oct 2011 18:07:11 -0700
>>>>> From: "Dennis Younker NE6I"<ne6i at cox.net>
>>>>> Subject: Re: [Kenwood] TS-940S Not Receiving on CW
>>>>> To:<ma.locksmith at juno.com>
>>>>> Cc: kenwood at mailman.qth.net
>>>>> Message-ID:<F4A2FF2BC01340DEB9FFF3D05EAEE8D3 at dennishome>
>>>>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>>>>> reply-type=original
>>>>>
>>>>> Works fine in AM mode. I can copy AM stations fine, and tuning into a
>>>>> CW
>>>>> signal, I can hear a carrier coming and going (without the BFO of
>>>>> course).
>>>>> In CW mode however, the receiver goes quiet (no audio) but the S-meter
>>>>> indicates that the unit is receiving the signal.
>>>>>
>>>>> ----- Original Message -----
>>>>> From:<ma.locksmith at juno.com>
>>>>> To:<ne6i at cox.net>
>>>>> Sent: Monday, October 24, 2011 11:33 AM
>>>>> Subject: Re: [Kenwood] TS-940S Not Receiving on CW
>>>>>
>>>>>
>>>>>> What do you get if you listen on AM mode to a CW signal?
>>>>>>
>>>>>> Ed
>>>>>> K1ZOK
>>>>>>
>>>> Hi Ed,
>>>>
>>>> I have a different Kenwood model than yours. When I had a similar
>>>> problem I tracked it down to a cold solder joint on one of the crystal
>>>> filter pins (CW just as yours). On mine I am able to select the filters
>>>> completely independent of the mode selected and it was a sure bet on the
>>>> filter (and it's connections). I am not familiar with the block diagram
>>>> of your radio to know if it is possible for that to affect yours in a
>>>> similar way. If your rig were mine that is the first place I would look.
>>>> Costs nothing but a little bit of time.
>>>>
>>>> 73,
>>>>
>>>> Bill  KU8H
>>>>
>>>>
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