This is a small transistor receiver for the medium wave range made in Japan in the 1960s. The circuit is powered by 9 V and has an output power of 25mW.
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...