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Philco 38-7-Help with Bakelite Block Cap
2/21/2011 9:54:09 AMDaveF
I was recapping this recent flea market find and the only caps that I did not do are the Bakelite block cap # 3793DG which, according to the schematic has 3 caps in it. My question is, since the actual power cord is attached to this block, is there a way I can just connect new caps to the terminals rather than "rebuild" the entire block? On the Philco repair site it states for this block, .015 cap on terminals 2 and 6, and the same on 2,3 and 6. The Philco site shows only 2 caps on this block, but my schematic clearly indicates 3, .015, .015, and .25. The radio has low volume and distortion and perhaps this block cap is causing it?
2/21/2011 10:58:19 AMNorm Leal
Dave

This block cap is a line filter and should not be the cause of low volume. To replace caps the originals must be disconnected. You can do this by removing originals from the block or cutting terminals on top.

Caps can be removed fairly easy by heating with a heat gun/hair dryer. Cut connecting wires going through eyelets on top. Push out insides through one of these holes while heating.

Norm

:I was recapping this recent flea market find and the only caps that I did not do are the Bakelite block cap # 3793DG which, according to the schematic has 3 caps in it. My question is, since the actual power cord is attached to this block, is there a way I can just connect new caps to the terminals rather than "rebuild" the entire block? On the Philco repair site it states for this block, .015 cap on terminals 2 and 6, and the same on 2,3 and 6. The Philco site shows only 2 caps on this block, but my schematic clearly indicates 3, .015, .015, and .25. The radio has low volume and distortion and perhaps this block cap is causing it?
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2/21/2011 10:58:23 AMScott
It would be a whole lot cleaner if you rebuilt the block. Heat the block up with a heat gun or similar source, remove the old and replace with the new. There are good directions on this process on the Philco site.

2/21/2011 8:25:34 PMplanigan
DaveF, are you sure the schematic shows three caps? The schematic in the resources section on here shows only two .015mf. I agree with you that the parts list shows the .25mf but that may be a misprint. Those are line caps and I don't think they ever used three in a configuration, either one across or two to ground.PL

:It would be a whole lot cleaner if you rebuilt the block. Heat the block up with a heat gun or similar source, remove the old and replace with the new. There are good directions on this process on the Philco site.
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2/21/2011 10:12:34 PMWarren
Another option is to remove the duel bakelite block. Install a terminal strip using the same hole. Add new Y-caps at this point along with your line cord. This would also be a good time to add a fuse block while your at it.


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