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Sideband · 21st Sep 2020, 10:36 pm

OK a few quick checks. I'm getting just over 90V off load so the 84V I mentioned earlier was with a typical 10mA load. There is approximately 22.7V across each diode so if you add those together you get 90.8V. There is 22.7V each across C1 and C2 and around 45V each across C3 and C4. The voltages across C3 and C4 effectively add together to give the 90V available across C5/6.

Be careful probing around while it's on....90V bites!

....and to prove it works....

90.6V is off-load HT and 22.7V is the voltage across each diode.

21st Sep 2020, 10:36 pm	#8
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,571	Re: Power Supply for AC/DC portable OK a few quick checks. I'm getting just over 90V off load so the 84V I mentioned earlier was with a typical 10mA load. There is approximately 22.7V across each diode so if you add those together you get 90.8V. There is 22.7V each across C1 and C2 and around 45V each across C3 and C4. The voltages across C3 and C4 effectively add together to give the 90V available across C5/6. Be careful probing around while it's on....90V bites! ....and to prove it works.... 90.6V is off-load HT and 22.7V is the voltage across each diode. Attached Thumbnails __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....