38-15 Project

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38-15 Project

Chuck Schwark
Phorum Expert

Posts: 1,703
Threads: 55
Joined: Sep 2005
City: Evanston, IL

#15

10-02-2012, 08:58 AM

Just looked at resistor 13 and it only feeds B+ to the mixer and IF tubes.
BUT, B+ goes thru the band switches and some coil windings.

Funky switch contacts or carbon tracks in the switch wafer(s) or coil shorts could be something also to look at. Maybe a dangling switch terminal wire, some kinda short to switch frame from a solder lug on a wafer......wracking my brain....crumbled insulation on any wires in that neighborhood.....pri to sec short/leakage in one of the osc coils...still a bad ('new') 2uF cap hanging on that B+ line, below the IF tube in dwg...

It is Full Moon right now. All else fails, use the tried and true
Six-Foot Navy Drop Test Procedure.

Chuck

Chuck Schwark,
The Philco Repair Bench
[Image: http://www.philcorepairbench.com/images/philog3tiny.gif]
http://www.philcorepairbench.com

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Messages In This Thread

38-15 Project - by ipwizard - 08-10-2012, 01:25 PM

RE: 38-15 Project - by Chuck Schwark - 08-10-2012, 01:32 PM

RE: 38-15 Project - by codefox1 - 08-10-2012, 02:02 PM

RE: 38-15 Project - by Chuck Schwark - 08-10-2012, 03:22 PM

RE: 38-15 Project - by ipwizard - 08-10-2012, 04:40 PM

RE: 38-15 Project - by ipwizard - 08-13-2012, 01:05 AM

RE: 38-15 Project - by ipwizard - 09-30-2012, 12:39 AM

RE: 38-15 Project - by Ron Ramirez - 09-30-2012, 06:42 AM

RE: 38-15 Project - by TA Forbes - 09-30-2012, 08:32 AM

RE: 38-15 Project - by ipwizard - 09-30-2012, 12:46 PM

RE: 38-15 Project - by Arran - 09-30-2012, 08:41 PM

RE: 38-15 Project - by ipwizard - 10-01-2012, 01:12 PM

RE: 38-15 Project - by Chuck Schwark - 10-01-2012, 03:56 PM

RE: 38-15 Project - by ipwizard - 10-01-2012, 06:32 PM

RE: 38-15 Project - by Chuck Schwark - 10-02-2012, 08:58 AM

RE: 38-15 Project - by Ron Ramirez - 10-02-2012, 09:03 AM

RE: 38-15 Project - by ipwizard - 10-02-2012, 02:13 PM

RE: 38-15 Project - by Ron Ramirez - 10-02-2012, 02:23 PM

RE: 38-15 Project - by codefox1 - 10-02-2012, 02:24 PM

RE: 38-15 Project - by TA Forbes - 10-02-2012, 04:14 PM

RE: 38-15 Project - by LASJayhawk - 10-02-2012, 09:53 PM

RE: 38-15 Project - by ipwizard - 10-03-2012, 12:14 AM

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