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.

Half-wave power control (CB20715E)
The trigger element of this circuit is a neon lamp. The SCR admits an equivalent. We found it in...
Bistable (CB21100E)
This bistable with transconductance operational amplifier was found in early National...
Portable ultraviolet source (CB7188E)
This 1965 circuit consists of a small inverter for an ultraviolet lamp. The circuit is from a...