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#1
11-08-2008, 12:23 PM
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Ge c-403h
Picked this radio up at a tag sale for a buck. It works surprisingly well for it's age. I was thinking that it would be a good idea to recap it. A brief look inside I only see one can cap, but I think there must be a few more in there somewhere. Does anyone have any documentation for it or recommendations?
I have a tube tester so I will test them all, but I can't read the rear decal to see what they are. I have rebuilt some Fisher, Eico, Sansui and Dynaco stereo gear, but this is my first small AM radio. Cheers, John
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My gear- Sansui 500-Fisher 800c-HK Ballad-Eico HF-60-Dynaco MkII-HK ST-7- BIC 960- Mission TT and a bunch of other crap 
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#3
11-08-2008, 02:58 PM
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You have one of the last tube radios built by GE from the mid to late '60's. In fact, GE made a solid state clock radio that looked just like this one. There's probably not that many wax paper caps in this radio. By the '60's, they were either using disc or mylar caps and these don't give much trouble. Also by this time, companies were using a component combination in the audio circuit consisting of several caps and resistors. These eliminated the individual parts count on these later radios. All I'd do would be to replace the electrolytic filter can and any tubular caps that you find.
Another problem that these later GE's suffered from is a condition known as "silver migration" in the IF transformers. The symptom is usually that the radio will play for a few minutes; then, the sound will become filled with static. These IF's can be repaired by removing the internal capacitors and adding external silver mica capacitors. It's a tedious job; so, consider yourself lucky if your radio works OK as is. Other than the IF transformer problems, these radios played very well.
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#4
11-08-2008, 03:59 PM
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It plays great for hours. I will look into replacing the large can cap, possibly opening it up and re-stuffing it. I don't think there are any tubular caps as far as I can remember. Thanks for the info!
John
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My gear- Sansui 500-Fisher 800c-HK Ballad-Eico HF-60-Dynaco MkII-HK ST-7- BIC 960- Mission TT and a bunch of other crap
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#5
11-08-2008, 07:01 PM
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You can find the C403A and C403D here: http://techpreservation.dyndns.org/s...l_Electric.htm
Both are the basic 5-tube circuit built by the boatload...
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