1-quadrant logarithmic converter (CB7333E)

This temperature compensated circuit was found in a Popular Electronics from the 90s. Integrated circuits and transistors are from that time.

| Clique na imagem para ampliar |

Rectangular oscillator 2N2646 (CB23920E)
The difference between this circuit and the previous one is that it uses PNP transistors. The...
Video Transmitter (CB13972E)
For the low channels (2 to 6) the coil is formed by 5 turns of wire 20 or 22 in a form of 1 cm...
Transistor Tester (CB10215E)
This circuit appeared in a noverber 1962s Practical Electronics. The magazine is no more, but the...