This amplifier, whose mounting on a printed circuit board was described in Radio Electronics of October 1960, has 35 W of power. The power supply uses a transformer and a set of 5 tubes.
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...