This FM receiver tuning step circuit was found in a 1960 documentation. No information about the coils is given, but the FI used at the time was 10.8 MHz.
This circuit for controlling high power in the AC network was found in a Motorola documentation from 1968....
Found in American documentation from the 90's, this circuit consists of a solid state relay with...
This oscillator uses a small transistor amplifier or radio output transformer. We found it in a...