Re: DC heater supply valve tester.
Tend not to think about efficiency when building linear PSU's, it's a good idea to though. So my heater supply on my valve tester used a LM317 and two TIP3055's to get over 3A. I made mine to be adjustable with fixed 5,6.3,12.6 and 0 - 30v variable. I only use the variable bit now as the voltage varies with different valves.
A.
__________________
Curiosity hasn't killed this cat...so far.
|