Heterodyne Mixer (CB4291E)

This is a typical 80's FM radio mixer circuit. The circuit was found in a documentation of the time.

| Clique na imagem para ampliar |

High Impedance Tone Control (CB14848E)
We found this circuit in a 1982 documentation. It uses a CA3140 or equivalent operational...
Implantable transmitter (CB9394E)
We found this circuit in a 1967 American documentation. It is a transmitter for animal research,...
Simple switch with SCR (CB25059E)
This circuit is used to switch direct current loads such as a lamp, for example. Remember that...