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Model 640 restoration questions.
#3

Tad,

Yes, the Sprague caps sound like replacements.

The shroud that goes around the bulb would probably look like the reflector from a small flashlight. Actually, that's not a bad idea - perhaps you could come up with one (preferably metal, not plastic) to use as a replacement. You could probably leave it in its silver color, or paint it a flat black. The material is fairly thin, so if you need to, cut it to shape as needed.

As far as other components go, resistors can often drift out of tolerance. Check them and replace any that are 20% or more off. When they do drift, they go up in value. Stay close to the correct wattage as best you can. The higher value resistors are the ones that are the worst (500K and up). Also, generally speaking, the smaller mica caps rarely go bad, so leave them be.

After getting it working, I'd recommend doing an RF alignment on the set. It should really sound great after that.

Looks like you have youself a winner! Icon_biggrin

Bill

Sent from my Pentium II on the AT&T Dial Network


Messages In This Thread
Model 640 restoration questions. - by Guest - 03-23-2007, 01:43 PM
[No subject] - by Chuck Schwark - 03-23-2007, 02:52 PM
[No subject] - by Bill Hutchinson - 03-23-2007, 02:58 PM
[No subject] - by Guest - 04-02-2007, 01:09 PM
The band that doesn't work...... - by AI2V - 04-02-2007, 06:48 PM
[No subject] - by Bill Hutchinson - 04-04-2007, 02:41 PM
[No subject] - by Guest - 04-05-2007, 07:09 PM
[No subject] - by planigan - 04-14-2007, 12:32 AM



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