This circuit was found in an Electronic Design. The circuit can be programmed to operate in different frequency ranges with the indicated characteristics. The IC component is uncommon today.
We found this circuit in a 1965 magazine. The circuit can be assembled with current equivalent...
This is a typical circuit of a PROM programmer from the 70s. It appeared in the magazine Radio...
If there is an indispensable household appliance in our kitchen these days it is the microwave...