This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the time, and two transformers are used. The input has 10k impedance and is powered by 12 V.
This decoder TTL circuit for 15-channel remote control was found in Selezione Radio, Italian...
The voltage gain of this DC amplifier is 100 times, given by the relationship between R2 and R1....
This circuit can be used both as a beat oscillator and for testing and adjusting AM receivers for...