Philco 41-285 wiring issue

[jr_tech]

I think that you have correctly identified the pin numbers.

I would do a few more checks before cutting the diodes and resistors out of the circuit. Do you have a voltmeter?

1. Can you measure any DC voltage (perhaps 250VDC or so) between the capacitor (+) where the diodes are connected and ground (chassis), when the radio is on ?

2. Pin 5 (still connected) should be one of the heater pins of the tube. Can you measure AC voltage between that pin and ground? If it is 6.3 VAC, you are in luck, and you merely have to ground pin 1 (perhaps to the ground lug on the nearby terminal strip) to get the tube to light up.

It looks like the green cloth covered wires are connected to the PLATES of the tube (pins 2 and pin 3) This will be a fairly high AC voltage, perhaps as much as 500 Volts between the two green cloth covered wires. Be VERY careful, if you try to measure this voltage.

Is the base of the tube charred or is the socket in the radio charred?

jr