Hi Barrie, How about a 1970's methodology... a SCR phase controlled regulator? 73 & Good morning, Marv WC6W -- "Barrie Smith" wrote: I've been running the HV for my 432 amp from a sort-of all-purpose power supply through a long piece of coax. The problem is that the power supply is built (in my typical fashion) in the bottom of a large rack, with no covers on anything. So, HV is readily accessible to my wife's relatively new and very curious cats. Untill I can unbuild, and then fashion covers for the main power supply, I think I'll build a complete power supply for the 432 amp. I don't want to buy a new transformer. I do have a surplus Peter Dahl 3100 volt @ 1.5 amp ccs transformer that will supply more than the 3000 volts that I need. I could include a variac, which I have, although I hear various reports on this reflector that variacs are bad. Another option, which I know nothing about, would be the "buck-and-boost" scheme. Other than going QRT, any comments on an approach? 73, Barrie, W7ALW _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ________________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today!