Video Amplifier (CB21321E)

Found in Popular Electronics from the 90s, this circuit is intended for amplifying analog video signals.

Voltage Regulator LM3900 (CB5044E)
In the figure we have the use of one of the four existing amplifiers in the LM2900 and LM3900 as a...
Tuning Indicator (CB1489E )
We found this circuit in a 1975 publication. The power supply must be symmetrical, but other...
Ring Counter using PUT (CB5205E)
This circuit was found in old documentation. PUTs are uncommon components today. The circuit...