[Hallicrafters] S-22R audio

[Mike Everette]

First:  

The obvious: Have you checked the tubes, by substitution?  It could be that simple.

Next: 

Have you checked the resistor values in the audio circuit?

Even the cold values might offer a clue.

Typically in these older Halli receivers, you'll end up replacing anywhere from half to 90 per cent of the resistors.  Halli used relatively cheap quality parts, and it's not unusual to find values off by anywhere from 50% to 200%.

And finally:

Check your soldering.  You may have a resistive joint which is heating up.

Yes, I have restored an S-22R -- two of them in fact.  Actually it's more like "rebuilt."  They're surprisingly good little radios when they are right.

DO BE CAREFUL.  This is an acey-deucey radio in a metal case.  It can kill you if you plug it in wrong.  Do you have a 3 wire cord?  Do you have an isolation transformer?  

A simple, lifesaving addition is an isolation transformer inside the cabinet.  There is plenty of room for a 60-75 watt unit.

73

Mike
WA4DLF





On Monday, February 3, 2014 9:20 PM, "bonddaleena at aol.com" <bonddaleena at aol.com> wrote:
 
Does Radio Shack still sell 'freeze spray'? If not, try some canned air from the stationary store, might cool off a component enough to track it down.
One 'tool' I use a lot, is a stick of Delrin plastic for tapping things............

ron
N4UE







-----Original Message-----
From: Glen Zook <gzook at yahoo.com>
To: Rob Winningham <rwinningham at me.com>; hallicrafters <hallicrafters at mailman.qth.net>
Sent: Mon, Feb 3, 2014 7:07 pm
Subject: Re: [Hallicrafters] S-22R audio


Could be a capacitor going bad.  Could be a bad solder joint.  Could be the 
contacts in one of the tube sockets. Among other things.

Glen, K9STH


Website:  http://k9sth.com



On Monday, February 3, 2014 4:50 PM, Rob Winningham <rwinningham at me.com> wrote:

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

Sent from my iPhone
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