Return-Path: Received: (qmail 86842 invoked from network); 31 Jan 2004 22:01:58 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 31 Jan 2004 22:01:58 -0000 Received: (qmail 57478 invoked from network); 31 Jan 2004 22:01:58 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 31 Jan 2004 22:01:56 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1An3Bc-000Ebt-Ch for dave@picks.force9.co.uk; Sat, 31 Jan 2004 22:01:56 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1An3Ai-0008EK-4J for rs_out@blacksheep.org; Sat, 31 Jan 2004 22:01:00 +0000 Received: from [62.58.50.88] (helo=postbode01.zonnet.nl) by post.thorcom.com with esmtp (Exim 4.14) id 1An3Ah-0008E1-0T for rsgb_lf_group@blacksheep.org; Sat, 31 Jan 2004 22:00:59 +0000 Received: (qmail 6712 invoked by uid 10); 31 Jan 2004 22:00:27 -0000 Received: (vexira-qq 06665-9770E4B0 invoked from network) 31 Jan 2004 23:00:26 +0100 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.183]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 31 Jan 2004 22:00:26 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000801c3e844$96555220$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org References: <6.0.1.1.2.20040129133740.036bcc40@POP3.freeler.nl> <6.0.1.1.2.20040130133028.02f11dc0@POP3.freeler.nl> <001801c3e80d$73b88fc0$e1e9fc3e@l8p8y6> Date: Sat, 31 Jan 2004 22:52:55 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Antivirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.23.0.3; VDF: 6.23.0.53; host: postbode01.zonnet.nl) Subject: LF: Schematics powersupplies 50-100Volt wanted Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40,HTML_MESSAGE autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit

Hello all,

after 2 days of searching the internet and a lot of magazines here,

I still haven't found any (simple) design for a powersupply in the 50-100V range.

I want to run something with an fixed voltage between 50 to 100 Volt, depending

on what transformer configuration I'm using.

However, I want to have some sort of automatic protection circuit against

to high currents that switch of the supply when current gets to high.

Yeah, I know, a normal fuse will work, but I do not want to spend a bag off

fuses while experimenting.

It will be a unit that requires an input of 50-100V AC, giving a fixed DC value out.

(that gives me the possibility to use various transformers)

So, any hints suggestions or maybe website's will be welcome.

Dick, pa4vhf