[Heathkit] HW-101

[Jim Shorney]

I had a Swan rig that exhibited similar behaviour. It turned out the be the
audio output tube. The plate would actually start to glow red. Checked fine on
a tube tester. Go figure. 

73

-Jim
NU0C


On Sat, 06 Jul 2013 17:52:42 -0400, KA4INM wrote:

>   On 07/06/13 13:28, Bob KB1OKL Young wrote:
>
>> Hi all, new member here, I just powered up a nice HW-101 I bought about 5 years ago, it works well, except that the audio volume drops from (loud) normal to a very low level within about 2 seconds of warm up. I need to leave the volume on full. A very strong signal is audible but less strong signals can get very soft to the point of inaudibility, kind of like when you switch off the AGC in a receiver. Got some tubes coming for it but off hand does anyone have any idea where I should start looking? I've gotten good reports on the audio and strength of the signal. Speaker is fine.
>
>   Try replacing the tubes on the board with the audio output tube.
>-- 
>   Ron  KA4INM - Youvan's corollary:
>                 Every action results in unwanted side effects.
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“There’s something out of place – let’s go and poke it with a stick.” – The
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