10-20-2026, 05:25 PM
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.




