[Hallicrafters] S-22R audio

[Mike Everette]

FYI, just because a capacitor is new, doesn't mean it's good!  Learned that the hard way.
 
Depending upon the particular S-22R (i.e. when this one was built), it may have old style dog-bone resistors.  These have the leads wrapped around the ends.  I've seen these become intermittent.  And, as Richard says, it may be a resistor that is broken.
 
Treat this like a learning experience.  And not only will the experience serve you well, you'll also have a decent li'l radio when you're done.  The S-22R is near the top of my "favorite" list.
 
And a word to the wise... there is a capacitor from the plate of the output tube to ground.  Make sure this one is rated for more than any 150 volts (as are most of the others in the receiver); if it happens to short to ground, your output transformer is a goner.  To be safer here, I'd use a 1 KV.
 
73
 
Mike
WA4DLF

From: Richard Knoppow <1oldlens1 at ix.netcom.com>
To: Rob Winningham <rwinningham at me.com>; hallicrafters at mailman.qth.net 
Sent: Monday, February 3, 2014 10:51 PM
Subject: Re: [Hallicrafters] S-22R audio



----- 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 

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