07-11-2025, 10:04 AM
Hi OSanders,
Some more things to check:
Check with Paul Philco who has this set (If I got his post right). The leftmost tube as viewed from the rear may be the oscillator. Yours has a shield on it. There is no indication on the schematic that the tube should have a shield. In addition, if the shield is supposed to exist, it must be in secure electrical contact with the metal base of the tube which should have continuity with chassis ground..
That 2.2 Megohm resistor that you replaced, was horribly installed during manufacture. Even if not the cause of your problem, it can become the cause of it.
Check voltage on both sides of the 33K Ohm resistor between B+ and the plate of the oscillator. Voltage should be about 160V at Cap 37 and the resistor, and about 70 V between the resistor and tube plate.
If the voltage at the tube plate is really high when the set is not working, then check socket connections, the band switch and connections to the oscillator coil.
+1 on all comments about socket connections and cold solder joints.
Some more things to check:
Check with Paul Philco who has this set (If I got his post right). The leftmost tube as viewed from the rear may be the oscillator. Yours has a shield on it. There is no indication on the schematic that the tube should have a shield. In addition, if the shield is supposed to exist, it must be in secure electrical contact with the metal base of the tube which should have continuity with chassis ground..
That 2.2 Megohm resistor that you replaced, was horribly installed during manufacture. Even if not the cause of your problem, it can become the cause of it.
Check voltage on both sides of the 33K Ohm resistor between B+ and the plate of the oscillator. Voltage should be about 160V at Cap 37 and the resistor, and about 70 V between the resistor and tube plate.
If the voltage at the tube plate is really high when the set is not working, then check socket connections, the band switch and connections to the oscillator coil.
+1 on all comments about socket connections and cold solder joints.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55




