This signal amplifier for ATV in the 427 to 439 MHz band was found in a magazine 73 for radio amateurs of the 90's. The circuit is installed next to the antenna on the mast itself.
The circuit shown is from the Texas Instruments optoelectronics manual. It is intended for audio...
This circuit was found in a 70s American documentation. The operational amplifier supports a modern...
This circuit for the power grid was found in the June 1969 Radio Electronics magazine. The SCR and...