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.

7555 Monostable with Electronic Triggering (CB25127E)
This circuit is like the previous one except that it can be triggered electronically. The circuit is...
VMono VU meter (CB8229E)
Found in 90s Radio Electronics, this audio indicator makes use of an integrated circuit that is...
1 kHz 555 Triggered Oscillator (CB25515E)
Found in the October 1992 Radio Electronics magazine, this oscillator is controlled by switch S1....