Fast Switch (CB6456E)

This circuit was found in a 1967 US documentation. The FET is general purpose and the 6V zener. The circuit has a very fast switching action.

| Clique na imagem para ampliar |

VCR Amplifier (CB25269E)
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
Simple continuity tester (CB7955E)
This very simple continuity tester uses a small 1.5 V lamp (type used in flashlights). Can be...
Transistor Radio TR3B (CB18388E)
This commercial radio with 3 earphone listening transistors was manufactured in Japan in the...