Pulse-triggered 7555 monostable (CB25128E)

We found this circuit in a Radio Electronics magazine from April 1988; The output timing is given by R1 and C1.

Dual Tuning Circuit with Varicap (CB13344E)
In the figure we have the way to use a single control voltage to act on two varicaps...
Soldering Iron Bench (CB17059E)
This simple power reducer, based on capacitive reactance, was found in a 1995 documentation. The...
Tone Control Preamplifier (CB19176E)
We found this circuit in a European schematic from the 90s. The used integrated circuit can still...