This protection circuit for standing waves was found in a manual of high frequency circuits and transmitters from the 1980s. The circuit is used with transmitters.
This circuit was found in a 1977 documentation. With it we have the direct indication, through LEDs...
In the figure we have the CMOS logic test circuit developed with the 4049. The circuit activates three...
This headlight reminder for your car was found in the May 1970 issue of Radio Electronics...