This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil is for the medium or short-wave range.
This circuit was obtained from old documentation and has a very simple 6 or 12 V configuration...
This circuit should be used with low frequency signals only. The circuit is from a documentation from the...
Found in a 1967 General Electric SCR manual, this circuit triggers in case of excess current,...