Passive tunable filter (CB7407E)

Found in American documentation from the 1980s, this circuit is a basic signal rejection filter network using only passive components.

| Clique na imagem para ampliar |

Power Supply with SCR from 0 to 16 V x 5 A (CB3842E)
We found this thyristor power supply in a 1987 documentation. It uses common SCRs as rectifiers and...
Mini amplifier 2N301 (CB20529E)
This 200-mW amplifier uses one of the first commercial power transistors. The circuit is from a...
Telegraph Practice Oscillator (CB4890E)
This traditional oscillator circuit that can be found elsewhere in this section uses general...