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.
In this circuit, the current capacity doubles, but is still of the order of microamps. The...
This radio's transistor is powered with the signal's own energy, producing its amplification....
We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today,...