[Elecraft] K3 problem

[Willis]

Jerry it sounds like a possible power supply problems.  Have you tried a different supply?

Sent from my iPhone

On Aug 16, 2010, at 11:28, "Jerry Pittenger" <k8ra at columbus.rr.com> wrote:

> Well it looks like I have a problem.    There is an intermittent buzz on the
> speaker audio.   When I turn on the radio it works perfectly.  But after a
> few minutes a strong buzz overlays the audio.  It is sever.  You can hear
> the stations under the buzz.   If I turn the radio off and immediately back
> on, the buzz is still there.  However if I leave the radio off for 3 or 4
> minutes and turn it on, it is fine for a few minutes and then the buzz pops
> back on.   Also keying the radio on CW also seems to fire up the receiver
> buzz.   Note that it is okay on a pair of headphones.  It is like it is
> going into oscillation.  Everything else on the radio seems normal. 
> 
> 
> 
> Any suggestions?    I suspect a component in the audio amplifier.   Does the
> headphone jack take the audio signal before it hits the main audio amp?
> I wish I had a set of circuit diagrams.
> 
> 
> 
> Jerry K8RA
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