Return-Path: Received: (qmail 30336 invoked from network); 27 Aug 2004 16:29:48 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore01.plus.net with SMTP; 27 Aug 2004 16:29:48 -0000 Received: from mailnull by ptb-spamcore01.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1C0jhP-000Bb1-9f for dave@picks.force9.co.uk; Fri, 27 Aug 2004 17:35:35 +0100 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1C0jhP-000Bay-4G for dave@picks.force9.co.uk; Fri, 27 Aug 2004 17:35:35 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1C0jbn-0000OC-Pn for dave@picks.force9.co.uk; Fri, 27 Aug 2004 16:29:47 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1C0jbM-00023S-GA for rs_out_1@blacksheep.org; Fri, 27 Aug 2004 17:29:20 +0100 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1C0jbM-00023J-3c for rsgb_lf_group@blacksheep.org; Fri, 27 Aug 2004 17:29:20 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.thorcom.net with esmtp (Exim 4.41) id 1C0jbI-0000wn-Uj for rsgb_lf_group@blacksheep.org; Fri, 27 Aug 2004 17:29:20 +0100 Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1C0jaL-0006Y2-00 for rsgb_lf_group@blacksheep.org; Fri, 27 Aug 2004 17:28:17 +0100 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1C0jaH-0003XX-00 for rsgb_lf_group@blacksheep.org; Fri, 27 Aug 2004 17:28:13 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Fri, 27 Aug 2004 17:28:12 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 X-UH-MailScanner: No Virus detected X-SPF-Result: relay.thorcom.net: 147.197.200.9 is neither permitted nor denied by domain of herts.ac.uk X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,HTML_70_80=0.105,HTML_FONTCOLOR_UNKNOWN=0.1,HTML_MESSAGE=0.001,YOU_WON=0.027 Subject: LF: RE: Re: Re: Balloons Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_70_80, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,YOU_WON autolearn=no version=2.63 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-transfer-encoding: 8bit

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of dj9dw
Sent: 27 August 2004 16:33
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: Re: Balloons

how about 2 brushless motors (modelairplanes), 2 propellers, 3 wires for motorsupply and as vertical. Only question: what about the 3 chokes at 15 kV rf?

Regards, Peter, dj9dw.

Dear Peter, LF Group,

Simple – just design the motor drive to run from a 137kHz AC supply – then you won’t need chokes :-)

Cheers, Jim Moritz

73 de M0BMU