Solar Frequency Standard (CB21951E)

This solar cell powered circuit generates a standard 100 kHz signal. The circuit is from a 1960 Gernsback documentation.

5W Transistorized Amplifier (CB1317E)
This good amplifier with output in complementary symmetry is from an old publication, and modern...
12V x 7.5V Converter (CB4352E)
This circuit was published in an English magazine from 1980. The magazine no longer exists, but...
Power Cut-off Protector (CB17463E)
This circuit, from 1999 documentation, prevents the powered device from receiving power when it...