Two Transistors T20 Radio (CB18386E)

This commercial earphone receiver was manufactured in the 1960s in Japan. It was powered by a 9 V battery and the transistors were made of germanium.

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Remote Call ID (CB16379E)
The project that we present below is very interesting, serving to identify remote calls such as in...
1-Transistor MW Radio (CB11576E)
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
Amplifier for Telephone Pickup (CB988E)
The purpose of this circuit is to amplify the signal of a phone pickup and to be able to reproduce the...