Test circuit with bridge (CB22530E)

This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from Radio Electronics June 1952.

Digital Cassette Recover (CB13606E)
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...
0 to 12 V Adjustable Power Source (CB16283E)
This ultra-simple adjustable power source is of great use on the bench of any electronics...
Light Sensor Preamplifier (CB6434E)
Found in a 1990s American technical brochure, this circuit is intended for alarms that use as...