Found in 90s Radio Electronics, this circuit is intended for amplifying analog video signals. Integrated circuits are uncommon today and the bandwidth is 100 MHz.
This filter, from an audio publication from 1977, passes the frequency range corresponding to the...
In the figure we have three voltage doubler configurations that can be used in high and low...
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...