FET simple mixer (CB8760E)

We found this simple mixer in a 90s Radio Electronics. The used FETs are still common. The inputs are high impedance.

Analog Multimeter (CB11829E)
This circuit from the 40's is a conventional analog multimeter with several scales. Its accuracy will...
1 W LM390 Amplifier (CB13196E)
The integrated circuit used in this project is no longer very common, but if found it can result in...
5 V switched regulator (CB8702E)
This switched regulator configuration was found in Motorola's 1969 documentation. The integrated...