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 modulated transmitter for a light beam communication system was found in the 1991 Electronics...
This amplifier step with a transistor has an input impedance of 100k to 10 M. The transistor can be any...
With this circuit, tests can be carried out on cables with great practicality. The circuit is...