This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be used. The maximum signal frequency for the indicated components is 250 kHz.
Used by the police this receiver tuned to the low VHF band. The circuit is from a documentation from the...
This circuit, for bands above 15 MHz, was found in an Argentine publication from the 1970s. The L1...
Found in documentation from the 1980s, this circuit can be used with other operational ones. The...