UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - EPE Electrolytic Capacitor Tester/Reformer Construction

Uncle Bulgaria · 15th Jul 2020, 9:35 pm

I came to the same conclusion as you, having run a search using keywords from Diabolical Artificer's post - a few sites have circuits showing the pot on the input, but they do have a load resistor on the secondary.

In the Reformer circuit, the output voltage is varied by changing the resistance divider values in the autotransformer's feedback loop, and the switching transistor is between ground and the primary/secondary join. Suppose I put a load resistor equal to that required for 10V output on the secondary? Am I then simply reproducing the generation part of the reformer circuit with the signal generator and resistor?

15th Jul 2020, 9:35 pm	#10
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: EPE Electrolytic Capacitor Tester/Reformer Construction I came to the same conclusion as you, having run a search using keywords from Diabolical Artificer's post - a few sites have circuits showing the pot on the input, but they do have a load resistor on the secondary. In the Reformer circuit, the output voltage is varied by changing the resistance divider values in the autotransformer's feedback loop, and the switching transistor is between ground and the primary/secondary join. Suppose I put a load resistor equal to that required for 10V output on the secondary? Am I then simply reproducing the generation part of the reformer circuit with the signal generator and resistor?