This circuit is from the 70s. The integrated circuit used is not common today and the supply is made with a voltage found in televisions of the time, where it was used.
This is the decoder circuit for the previous encoder (CB17011E) using integrated circuit MC14028. This...
This simple voltage regulator or stabilizer uses only two component and can source up to 100 mA to a...
We found this preamplifier for the 10 and 11-meter range in an old documentation for radio...