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 circuit is from 1968 documentation. We can assemble it with more modern components such as a...
Found in a 90s Silicon Chip documentation this circuit is intended to protect a speaker system in...
The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from...