Old Radio Disaster

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Old Radio Disaster

Post by anachronist on Sun Nov 13, 2011 9:19 am

Going through a servicing book, the following visual checks on a pictured inoperative radio (to put it mildly) were suggested:
Variable capacitor, plates scraping together; broken trimmers
Loop antenna wire broken, connections loose or external longwire lead broken or disconnected
Dial cord and drive assembly loose, broken or out of adjustment
Foreign matter in loudspeaker. Cone broken or torn
Grid caps loose, connection broken, wire short circuited to shield
Tubes not lit, microphonic, loose in socket
I-F stages aligned to BC band (screws opened and loose)
Loudspeaker leads loose, broken, or short circuited

Over the years I probably had several AA5s (in particular) with all of the above troubles simultaneously (and yet more) sitting on my bench. Some of the above are results of tampering, the rest, of course, due to age. Most are a challenge and yet somehow a source of [masochisted] pleasure.


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Re: Old Radio Disaster

Post by Tim Tress on Sun Nov 13, 2011 5:10 pm

Here's one to add: A wiring error from the last person who tried to repair it! I have seen several of those...

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Re: Old Radio Disaster

Post by Doug Burskey on Thu Feb 09, 2012 12:59 am

And another one, all the trimmer screws on the IF transformers screwed down tight and I do mean TIGHT by some overly handy handyman.

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Re: Old Radio Disaster

Post by sprman on Fri Feb 10, 2012 9:39 pm

Rusted vari cap over tightened trimmers on vari cap.Broken shaft to on/off..Sprman

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Re: Old Radio Disaster

Post by westcoastjohn on Sat Feb 11, 2012 2:02 pm

What, no rust and corrosion? Maybe it's the salt air around here, but when the radio's been out in the shed for a few years, it can be a very sad situation. The output transformer is always a bit of a worry if it's gotten wet a few times.
Gunk from who knows what they were doing in the garage, that's another one.

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Re: Old Radio Disaster

Post by Doug Burskey on Sat Feb 11, 2012 8:33 pm

Minus wires of the replacement electrolytic capacitors connected to the chassis.This would of worked fine but this AA5 I was working on B- was isolated from the chassis.HUMMMMM
And according to the son of the former owner that radio always humed as long has he could remember.

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