The purpose of this circuit is to check the linearity of SSB amplifiers. The circuit was found in an old documentation for hams. The diode is a general purpose detector type.
In the figure we have a very sensitive touch switch circuit. A touch of the sensor causes the...
We found this timer for times of a few minutes in a 1974 Ferranti transistor manual. The relay is 37...
This circuit is from the 1990 Motorola Linear Databook, which can be developed with more modern...