Broadband Balanced Mixer MC1556G (CB14563E)

We found this circuit in Motorola's Linear Databook in 1990. The integrated circuit used is no longer common today.

Voltmeter without indicator (CB7348E)
Suggested by the General Electric Hobby Manual of 1965 this circuit measures voltages from 0 to...
Amplifier Stage OC71 (CB14750E
) The circuit in the figure uses an old OC71 germanium transistor. Performance depends on...
JFET dip meter (CB5176E)
We find this circuit in an American documentation from the 80's. The circuit has the coil given by the...