Balanced Line Driver (CB6223E)

This 600-ohm line driver was found in a 1980s documentation. The integrated circuit used is not common today.

Dwell meter (CB23521E)
This old circuit for circuit breaker cars was found in a 1963 publication. The transistors are...
Precision Voltmeter with the 741 IC (CB21679E)
Several circuits similar to this one can be found on our website. This is from an internet...
Multi-voltage source (CB1574E
The circuit of the figure can provide voltages of 5, 8.9 and 12.5 V at its output, all doing this...