The integrated circuit used in this amplifier is uncommon today, since the project is from the 90s. The power is 24 V, and the gain of the circuit is 40dB. The input resistance is 1 M ohms.
This is the receiver for the transmitter suggested in CIR13081. The configuration is old, and...
This circuit has a frequency control. We found it in a Radio Electronics from January 1965. The...
This circuit was found in an old American magazine for radio amateurs. The circuit is based on a...