This circuit for the 40 MHz band was published in Radio Electronics magazine in December 1957. Its purpose was to monitor the signals of the Russian satellite launched at the time.
Found in RCA documentation from the 1960s, this 60 V regulator has a 100 V input and a current of 1...
Using a reed relay, this protection circuit depends only on the adjustment of the closing point by a wire...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...