08-23-2013, 07:18 PM
Hi All;
I have wired up the Oscillator circuit, according to the schematic I have for the Philco 39, It does one of the things that my Radio does.. It overheats the 5K resistor, that is between the Plate and the 2nd Grid.. The voltages are suppossed to be on the Plate +136Volts, which it has correctly.. On the 2nd Grid it is suppossed to have +120Volts and it has arround +50volts.. Grid 4 (tube cap) is --3 which is correct.. Grids 3 and 5 have +67Volts which is correct..
Am I Missing something as to "WHY" The 2nd Grid is being pulled so Low, also attached to the 2nd Grid is one side of the Coil, and the other side of the coil goes to a Capacitor, so there would be NO DC flow there, which ends up going to ground thru a 51K resistor..
THANK YOU Marty
I have wired up the Oscillator circuit, according to the schematic I have for the Philco 39, It does one of the things that my Radio does.. It overheats the 5K resistor, that is between the Plate and the 2nd Grid.. The voltages are suppossed to be on the Plate +136Volts, which it has correctly.. On the 2nd Grid it is suppossed to have +120Volts and it has arround +50volts.. Grid 4 (tube cap) is --3 which is correct.. Grids 3 and 5 have +67Volts which is correct..
Am I Missing something as to "WHY" The 2nd Grid is being pulled so Low, also attached to the 2nd Grid is one side of the Coil, and the other side of the coil goes to a Capacitor, so there would be NO DC flow there, which ends up going to ground thru a 51K resistor..
THANK YOU Marty
