SG-402, radio from 1940

[Peter08012018]

Thank you. I will first demodulate the internal 400Hz with the diode (or a transistor, as I did not find a diode), capacity between. This is within reach today or tomorrow. I do have those solderless breadbords. Thanks for the input-modulation consideration, I will amplify my MP3 player with a transistor to get 2V, or some volts, of audio. That should tell the SG-402 health, given I do not have better tools.

I will also try again, have a wire near the ferrite antenna of the radios, or around the radios at all. First try did not give results.