[Hallicrafters] S-22R audio

[Richard Knoppow]

----- Original Message ----- 
From: "Rob Winningham" <rwinningham at me.com>
To: <hallicrafters at mailman.qth.net>
Sent: Monday, February 03, 2014 2:49 PM
Subject: [Hallicrafters] S-22R audio


> My S-22R works fine for a while and then the audio level 
> will drop to about 1/3 of what it was. If I let it sit for 
> a while, it will go back to normal, then the process 
> starts all over. I bought it a few months ago and it had 
> been recapped. Any ideas?
>
> Thanks, Rob
>
     This sounds very much like a broken resistor that is 
letting go when it gets hot and making contact again when it 
cools. You may be able to find it by poking at the wires 
with an insulated tool. Don't use an anti-static adjuster 
because they conduct enough to bite you if you get on some 
high voltage. You may also be able to track it down by using 
freeze mist and a heat gun. I have found some wire-wound 
resistors do this when they have bad connections at one end. 
Composition resistors often develop cracks. Pushing at them 
will often split them at the crack.
    Bad solder joints can also do this and can also often be 
found by poking at or wiggling the wiring.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com