[Kenwood] Slight Hum on CW TS-940S

Sun Sep 18 22:29:49 EDT 2011

On 09/19/11 12:07 AM, Dennis Younker NE6I wrote:
> It's been pointed out to me that I have some hum on CW transmit on my
> TS-940S. I listened for myself using another transceiver set up nearby.
> Sure enough, I can hear the hum. It's present regardless of band or power
> level. It's difficult for me to tell whether it is present on SSB. Is there
> a part that is most likely to cause this problem in this rig?
>> --Dennis, NE6I

I'd suspect an electrolytic capacitor has gone open. More likely in the power 
supply (AVR board). I've replaced a couple of capacitors which show obvious 
signs of bulging, indicating a pressure buildup inside.
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