This small analog TV transmitter was found in an Electronics Now from the 90s. The range is around 20 meters, and the coils are according to the channel on which you want to receive the signal.
Found in a 1999 documentation, this circuit makes use of a power germanium transistor and a...
We found this circuit in the March 1991 issue of Radio Electronics magazine. The integrated...
This Motorola circuit, found in old documentation, keeps the voltage applied to a load by a triac...