No problem - it's " yours" alright! Richard P Thanks for the nice words Richard, and thanks for the original idea seed too! (Likewise thanks to Russell and Dave and any others who contributed with ideas for 2 and 3 transistor regulators. :o) With this circuit I feel that I have spent enough hours thinking about it over the last 10 months, stripping it to the bare bones, evaluating the entire operation and then implementing a clever "monostable" system on the Zener voltage, along with the current dumps to force extremely rapid switching, to justify calling this new circuit "my" regulator. I hope this has not offended you, your original 2-transistor circuit is mentioned on my web page and I would also have Russell's 3-transistor high voltage circuit on there but I lost the gif. :o) -Roman -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body