Common gate stage (CB7470E)

This circuit for FET was obtained from a 1977 Radio Handbook. The input impedance is 150 ohm. The output is high impedance.

Delayed relay 4001 (CB24349E)
This circuit activates a relay after a time given by C1 and R1. The circuit is from a Radio...
Integrated AM Radio (CB18179E)
The integrated circuit used in this 1982 project is not very common today. It can be adapted to...
Modulated Function Generator (CB24255E)
This circuit is from the July 1973 Radio Electronics magazine. The circuit is based on the XR-205,...