Envelope-to: dave@picks.force9.co.uk Delivery-date: Sat, 28 May 2005 08:50:33 +0100 Received: by ptb-mxcore03.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Dbw5Y-00009f-Ux for dave@picks.force9.co.uk; Sat, 28 May 2005 08:50:33 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (PlusNet MXCore v2.00) id 1Dbw5Y-00009Y-Ql for dave@picks.force9.co.uk; Sat, 28 May 2005 08:50:32 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Dbw4u-0007xo-My for rs_out_1@blacksheep.org; Sat, 28 May 2005 08:49:52 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Dbw4u-0007xf-CV for rsgb_lf_group@blacksheep.org; Sat, 28 May 2005 08:49:52 +0100 Received: from smtpout18.mailhost.ntl.com ([212.250.162.18] helo=mta10-winn.mailhost.ntl.com) by relay1.thorcom.net with esmtp (Exim 4.51) id 1Dbw56-0002NC-62 for rsgb_lf_group@blacksheep.org; Sat, 28 May 2005 08:50:07 +0100 Received: from aamta03-winn.mailhost.ntl.com ([212.250.162.8]) by mta10-winn.mailhost.ntl.com with ESMTP id <20050528074944.IPPP20297.mta10-winn.mailhost.ntl.com@aamta03-winn.mailhost.ntl.com> for ; Sat, 28 May 2005 08:49:44 +0100 Received: from mikedennison ([80.4.116.83]) by aamta03-winn.mailhost.ntl.com with ESMTP id <20050528074943.DCQA2626.aamta03-winn.mailhost.ntl.com@mikedennison> for ; Sat, 28 May 2005 08:49:43 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Sat, 28 May 2005 08:43:43 +0100 MIME-Version: 1.0 Message-ID: <42982F3F.14021.85E628@localhost> In-reply-to: <367832978@web.de> X-mailer: Pegasus Mail for Windows (4.21c) Content-description: Mail message body Subject: Re: LF: off topics: Inverter 12V/-12V wanted from DK 8 ND Content-type: text/plain; charset=US-ASCII; format=flowed Content-transfer-encoding: 8bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) > for a cw-shaping circuit with an op-amp (second order key-klick filter > by Jim Moritz) I need an inverter for the negative supply of the > op-amp. > the circuit will draw only a few mA at voltages of -5...-12V, > DK 8 ND > Keep it simple - use a 9V dry battery! Mike, G3XDV ==========