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Philco 52-541
#4

MrFixr,  Frankly, I haven't plugged the thing in yet.  The resistance measurements haven't been close enough to trust.  The Beitmans schematic above isn't the one for the version I have on the the bench (the Sams Photofact 154-10 is correct).  I linked a portion of that one in my first post.  This radio is a code 122 Run 1 radio where they use a 35L6 instead of the 50L6 and stick a "tube saver" thermistor between the filaments of the 35L6 and the 12BA6.  I've determined that the thermistor has gone bad.  I subbed a 50L6 and bypassed the thermistor and the filament ohms measurements have dropped in place.  The thermistor measures 1.7K, but I have no idea what it should measure cold.  My mind is a bit muddled but I will get back to this probably tomorrow morning.  Thanks for the insight,  Joe

Courage will follow when Faith takes the lead.


Messages In This Thread
Philco 52-541 - by Joe Rossi - 10-19-2026, 06:52 PM
RE: Philco 52-541 - by David - 10-19-2026, 08:19 PM
RE: Philco 52-541 - by MrFixr55 - 10-20-2026, 12:51 PM
RE: Philco 52-541 - by Joe Rossi - 10-20-2026, 05:25 PM



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