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Philco 20 voltage
Radioroslyn
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Posts: 7,285
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#6

11-11-2016, 04:09 PM
Ok lets check the dc voltage at terminal 6 on the power transformer.With - probe to the chassis and + to the terminal should see about -50vdc. If you do your audio driver transformer is suspect #21. To check it with the set off measure the resistance from terminal 6 to pin 3 of each 71A. Should see a fairly low resistance like less than 1K. If your seeing anything up in the 10's or 100's of K transformer is kaput! AES has a suitable replacement for abt $15. https://www.tubesandmore.com/products/tr...tage-10-ma

http://www.nostalgiaair.org/pagesbymodel...029582.pdf
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
(This post was last modified: 11-11-2016, 04:19 PM by Radioroslyn.)
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Messages In This Thread
Philco 20 voltage - by Awon - 11-11-2016, 12:15 AM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 08:14 AM
RE: Philco 20 voltage - by morzh - 11-11-2016, 09:10 AM
RE: Philco 20 voltage - by Awon - 11-11-2016, 01:37 PM
RE: Philco 20 voltage - by klondike98 - 11-11-2016, 02:57 PM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 04:09 PM
RE: Philco 20 voltage - by morzh - 11-11-2016, 04:39 PM
RE: Philco 20 voltage - by Awon - 11-11-2016, 08:24 PM
RE: Philco 20 voltage - by Awon - 11-11-2016, 08:38 PM
RE: Philco 20 voltage - by Radioroslyn - 11-11-2016, 10:57 PM
RE: Philco 20 voltage - by NostalgiaRadioTime - 11-13-2016, 11:04 PM
RE: Philco 20 voltage - by Radioroslyn - 11-14-2016, 12:21 AM
RE: Philco 20 voltage - by NostalgiaRadioTime - 11-14-2016, 11:26 PM



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  1. The PHILCO Phorum
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