Remote Amplifier (CB23728E)

This two-microphone amplifier was found in a April 1961 Radio Electronics Magazine. The circuit is powered by battery and has a 600-ohm line output.

| Clique na imagem para ampliar |

Tunable notch filter (CB7404E)
We found this circuit in an English publication from the 1980s. The circuit uses current...
Driver LED for fault indicator (CB21591E)
This circuit uses common transistors for a fault indicator that turns on an LED and provides an...
5 A x 120 kHz pulses (CB9245E)
This high current switching stage was found in a 1967 EEE. The power transistor is from that time....