[Elecraft] Strange Selective Hearing in My K3

[Eric Fitzgerald]

Hello Wise and Esteemed Reflector,

I supposed in any lengthy marriage a selective ear or a biological mute 
button, so to speak, becomes inevitable ...or so it would appear with my 
aging K3, purchased in 2009.

Here are the rather perplexing symptoms:

After the K3 has been on a while all signals and noise disappear.  The 
radios shows consistent s1 or 2 white noise.

This is true on all bands, all modes and with the preamp, agc, 
noiseblanker, etc on or off.

After turning the radio off for an hour or more, all signals return as 
normal - only to disappear again after an indeterminate period of time.

I'm guessing that there is some failure that is affected by the 
component in question heating up.  I use this radio in receive almost 
24/7 monitoring the bands.  Perhaps she is just tired of listening for 
me? ;-)

Any ideas what this might be?  Stupid operator error is never out of the 
question around here.  I thought I would ask in here before bugging 
Elecraft service in case I'm missing something easy.

TIA

Eric KG6MZS

www.kg6mzs.com