This 3-channel transmitter for amateur analog TV from 902 to 908 MHz was found in a QST magazine from the 90s. The circuit is critical and must be designed with special care in the layout of the board.
This simple receiver for listening on a crystal phone tunes the range of medium waves. The circuit...
This simple general-purpose circuit was found in a 1987 publication. It is a simple preamplifier powered...
The circuit shown is from a Texas Instruments opto-electronics manual. RE depends on the peak...