> Once you've uprated your life insurance and written your will, you > might want to investigate one of these (or > similar):http://www.ebay.co.uk/itm/170722896560 > > If I remember my time in the lab right, that's good for up to 500V and > several hundred mA. 400mA probably. Overkill for what you want, but > might enable you to get your project off the ground while you figure > the ins and outs of an optimal power supply.
Thanks Jon, but I already have a pair of these: http://www.vintage-radio.net/forum/showthread.php?t=54336 good for 500V@500mA, -200V@100mA and -200V@1mA which I use. I asked for help in finding a schematic drawing on the UK forum for them as they did not work properly. I accidentally found the error while checking how they were designed. There was a dry joint on one of the wires to the thyristor controlled rectifiers so the high voltage regulator were only supplied with a half wave rectified voltage when the dry joint was open circuit, which happened intermittently. The same error was found in both of my units so I guess that the same person had been soldering both of them and made the same mistake. The dry joint was on the gate connection to one of the thyristors rectifying one of the sides in the bridge rectifier. I got a reply from my contact in the transformer business today where he said that he could help me to either rewind or wind a new transformer for me. I did not know that he could make switched transformer too, I have just asked hom about normal E-core transformer earlier. He also told me to check the "Power Integrations website" which I will do, I guess it is this one: http://www.powerint.com/ , I'll read what they have to say and check if they can design a whole PSU for a small cost. Thanks all for all of your input! I'll report back what I find and also what design I will use. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
