This modulator circuit was found in an American documentation from the 90's. The circuit uses a low power LASER diode. Power is supplied with 12 V.
Found in a 90s Popular Electronics, this circuit is intended for amplifying analog video signals....
This antenna amplifier or booster for receivers from 100 kHz to 30 MHz was published in a...
This somewhat complex circuit was found in the May 1984 issue of Radio Electronics magazine. The...