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.
This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is...
The integrated circuit used in this configuration is uncommon today. The diodes are for general use...
This logic circuit that transfers the level from one gate to the next with each clock pulse was...