Mystery radio, French? from Golborne.

[ppppenguin]

It's a tedious and slow way of measuring voltage but it will work.

An old fashioned valve voltmeter with very high input impedance may be easier if you happen to have one.

ISTR my Fluke 87 has an option on some voltage ranges 9possibly only for very low voltages) to have a very high input impedance, much higher than the usual 10M, if you press the corerct buttons. I've never used this.


PS:
https://physics.ucsd.edu/neurophysics/Ma..._umeng0800 page 14 says themV range (up to 400mV only) can have a 4000M input impedance if the Hz button is pressed.

[boater sam]

A very quick flick around with the ohm meter shows that a number of the resistors are potentially higher than they should be. Not got time now to play with it any more and it will need all the glass caps changing anyway.
I found the one across the mains and snipped it. It was behind the mains transformer. Leaking badly, but surprisingly it had not exploded.
There is another that has pushed the pitch bung out of one end!

A day getting the boat fit to survive the winter is the priority, save the vintage radios for spring.