Philco rescued in Minnesota

[miniman82]

Sounds like the VDR in yours has drifted or something, it's part of the feedback mechanism which regulates high voltage. Same principle as the circuit used in the Portapotty.

[dieseljeep]

Originally Posted by miniman82

Sounds like the VDR in yours has drifted or something, it's part of the feedback mechanism which regulates high voltage. Same principle as the circuit used in the Portapotty.

Also Motorola's and some Admiral's. Did Philco use second anode voltage for the focus? If not, it might have a focus rectifier. No schematic handy!