Found in Elektor Electronics this circuit is intended for mixing analog video signals. The circuit has a 25 MHz passband.
This 4-function, high-pass, low-pass, band-pass and rejector filter was found in French...
This circuit is from a Radio Electronics from March 1970. The crystal depends on the frequency at which...
Found in a 1970 EEE, this circuit uses general-purpose transistors of the time. Transistors support...