Audio Preamplifier (CB18331E)

This small audio amplifier uses germanium transistors and a 12 V supply. The circuit is from a Japanese technical documentation from the 1960s.

| Clique na imagem para ampliar |

Unit Gain Stage (CB6157E)
This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms...
UJT Mini timer (CB16454E)
This timer of 10, 25, 45 seconds and 5 minutes has its times selected by the keys. The circuit drives...
Power-On Reset for the 4017 (CB174)
When the power is turned on, the output that goes to the high Iogic Ievel is not necessarily the...