Found in a 90s ARRL Handbook, this circuit is intended for the production of signals in the side bands for transmission in SSB.
These reset circuits when the power is turned on were found in an 80's EDN. The circuit also...
This circuit was found in a Philips documentation from 1970. The components are of the time,...
The LM2904 is not very common today, but common comparators and operationals can be used in the...