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Sideband · 21st Sep 2020, 2:27 pm

Hi Clay,
I can definitely say that the circuit works.....I built one! It gives me just short of 85V on load. The pictures on the website that Paul used are of the one I built. If you are only getting 45V then half of your quadrupler is not working. Make sure it's not something silly like a diode or capacitor connected incorrectly. I built mine straight from the circuit onto Veroboard over 10 years ago and it worked first time. I think I had to adjust one resistor value slightly but that was because I mounted the LM317 on a small heatsink and needed to reduce the dissipation......nothing whatsoever to do with the quadrupler.

Unless you have a dud diode or capacitor in the mix (which can happen even with new ones....and on that subject make sure the diodes are marked correctly with the band as cathode), I don't see how it can't work.

I don't have Spice so can't help there I'm afraid.

21st Sep 2020, 2:27 pm	#2
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,567	Re: Power Supply for AC/DC portable Hi Clay, I can definitely say that the circuit works.....I built one! It gives me just short of 85V on load. The pictures on the website that Paul used are of the one I built. If you are only getting 45V then half of your quadrupler is not working. Make sure it's not something silly like a diode or capacitor connected incorrectly. I built mine straight from the circuit onto Veroboard over 10 years ago and it worked first time. I think I had to adjust one resistor value slightly but that was because I mounted the LM317 on a small heatsink and needed to reduce the dissipation......nothing whatsoever to do with the quadrupler. Unless you have a dud diode or capacitor in the mix (which can happen even with new ones....and on that subject make sure the diodes are marked correctly with the band as cathode), I don't see how it can't work. I don't have Spice so can't help there I'm afraid. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman..... Last edited by Sideband; 21st Sep 2020 at 2:40 pm.