开云体育

Added to the output of the Hyelec PS-28A is a 12 VDC, 3ADC, 50w zener, the NTE 5254AK, mounted on a 3 inch x 5 inch extruded aluminum heatsink.
Well, so far, so good. I shouldn't be breaking any more of my favorite rigs PLUS, the crowbar helps to keep the shack warm!
72,
Bill, N4QA/4 in Oak Island ( OKI ), North Carolina, USA

I agree, my Motorola Service Monitor has a TO-3 zener diode on a huge heat sink protecting its 5 volt supply. Gotta love brute force.