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.
With the coded activation of the relays, it is possible to control which of the 16 outputs...
The integrated circuit used in this application is not very common. Transistors and resistors...
This simple circuit makes use of neon lamps to indicate the voltage of a power grid. The lamps are...