6W HiFi Amplifier (T480E)

This 4-tube amplifier with 6W of output was found in an American manual from 1947. The sound quality is excellent.

| Clique na imagem para ampliar |

Alarm with series sensors (CB6417E)
This series sensor circuit is from 1995 Popular Electronics. The circuit can use any SCR and the...
Two-Transistor Oscillator (MSB019E)
The circuit is a multivibrator version using two NPN general purpose transistor. This circuit can...
RIAA Preamplifier (CB16799E)
This circuit is from 1976 documentation. It uses the operational amplifier 709 which is no longer...