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Philco 37-670 restoration thread
Ron Ramirez
Silent Key
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Posts: 13,776
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City: Ferdinand State, Province, Country: Indiana
#23

02-03-2015, 07:56 AM
(02-03-2015, 12:11 AM)Diverted Wrote:  When I squeeze the 6A8 Dector/oscillator grid cap wire, the volume increases a good bit.

Sounds to me like you have an issue somewhere before the 6A8G control grid. How are the voltages on the 6K7G RF amp?

This sounds very much like the classic bad antenna or RF coil on AM. SW...??? Did you replace caps (8 ), (20) & (21)? Also check resistor (9); if it fails, you lose AVC to the RF tube and the radio will exhibit the same symptoms as open antenna coils.
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Ron Ramirez
Ferdinand IN
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Messages In This Thread
Philco 37-670 restoration thread - by Diverted - 12-30-2014, 03:55 PM
RE: Philco 37-670 rectifier - by millievolt - 12-30-2014, 04:25 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 05:03 PM
RE: Philco 37-670 rectifier - by Chuck Schwark - 12-30-2014, 04:28 PM
RE: Philco 37-670 rectifier - by millievolt - 12-30-2014, 04:33 PM
RE: Philco 37-670 rectifier - by morzh - 12-30-2014, 06:27 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 07:45 PM
RE: Philco 37-670 rectifier - by OZ4 - 12-30-2014, 08:14 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 08:35 PM
RE: Philco 37-670 rectifier - by OZ4 - 12-30-2014, 09:10 PM
RE: Philco 37-670 rectifier - by thirtiesradio - 12-31-2014, 03:44 AM
RE: Philco 37-670 rectifier - by Arran - 12-31-2014, 04:54 AM
RE: Philco 37-670 rectifier - by Diverted - 12-31-2014, 09:03 AM
RE: Philco 37-670 restoration thread - by John R - 12-31-2014, 05:19 PM
RE: Philco 37-670 restoration thread - by OZ4 - 12-31-2014, 01:03 PM
RE: Philco 37-670 restoration thread - by Ron Ramirez - 02-03-2015, 07:56 AM



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