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In Reply to: Re: Repair suggestions for a Grundig 2220U tube radio, please posted by Ed Fallon on April 18, 2007 at 13:06:07:
Thanks for the suggestion and the link. I'll check out the B+ supply...makes sense...
Follow Ups:
If so test it. Usually the caps start to go and take out the rectifier. An old analog voltmeter like a simpson 260 can often put out enough volts to test old caps for leakage.Personally I'm a shotgun approach type and just replace all caps other then ceramic and mica.
I've checked the HV circuit. It appears OK. So far, the Rectifier holds steady at 335V, the quad cap takes forever to discharge and all of the plates are within range. The rectifier, by the way, is a bridge package that is silver and about the size of a cel phone battery.
Yes - the caps should be replaced regardless, so that's where I'll start. I don't remember seeing a rectifier but I'll check again.
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