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Diabolical Artificer · 14th Apr 2018, 7:39 am

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.

14th Apr 2018, 7:39 am	#4
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,662	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.