Return-Path: Received: (qmail 3227 invoked from network); 13 Aug 2004 16:01:02 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore02.plus.net with SMTP; 13 Aug 2004 16:01:02 -0000 Received: from mailnull by ptb-spamcore01.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1BveXs-0002Lm-Oi for dave@picks.force9.co.uk; Fri, 13 Aug 2004 17:04:46 +0100 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1BveXs-0002Lj-Md for dave@picks.force9.co.uk; Fri, 13 Aug 2004 17:04:44 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BveUH-000Du7-1G for dave@picks.force9.co.uk; Fri, 13 Aug 2004 16:01:01 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BveTI-0006jC-Qt for rs_out_1@blacksheep.org; Fri, 13 Aug 2004 17:00:00 +0100 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BveTI-0006j3-Ce for rsgb_lf_group@blacksheep.org; Fri, 13 Aug 2004 17:00:00 +0100 Received: from h36.rdg.cp.net ([209.228.29.85] helo=n082.sc1.cp.net) by relay.thorcom.net with esmtp (Exim 4.41) id 1BveTE-0002xe-0D for rsgb_lf_group@blacksheep.org; Fri, 13 Aug 2004 17:00:00 +0100 Received: from l8p8y6 (62.252.232.240) by n082.sc1.cp.net (7.0.030.2) id 411CE216000004F1 for rsgb_lf_group@blacksheep.org; Fri, 13 Aug 2004 15:59:28 +0000 Message-ID: <000c01c47fbb$ddf43ec0$f0e8fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org References: <000d01c47d73$a61f59c0$3ad1fc3e@l8p8y6> <00ae01c47ff4$be4112e0$0e0124d5@jboi0045tiscali> Date: Wed, 11 Aug 2004 16:56:42 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 X-SPF-Result: relay.thorcom.net: 209.228.29.85 is neither permitted nor denied by domain of virgin.net X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,HTML_30_40=0.809,HTML_MESSAGE=0.001,RCVD_IN_SORBS=0.1,TW_TN=0.077 Subject: LF: Re: Re: HOT AIR 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=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE 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: F6CWN
To: rsgb_lf_group@blacksheep.org
Sent: Wednesday, August 11, 2004 11:44 PM
Subject: LF: Re: HOT AIR

11./08/2004   2157z
 
Hello Mal,
 
 My poor experiment with a kite is not very conclusive in RX mode...
 The kite was 4.2 meter large ( delta design) in carbon fiber and spi snail.
The wire was 2 mm aluminium. At 110 meter AGL it is impossible to tune
the variometer correcctly during a long period ( capacity move too much).
But it's works fine if you want receive broadcast transmitter ( like France-inter
on 162 KHz with 2.2 MW or BBC...!) I never receive OM LF station with this
antenna ( intermodulations).
Never forget to put a resistor between the wire and the ground and don't use
wire with PE or PTFE, the voltage will be very high by dry wind ( many KV!).
 
My conclusion:funny but dangerous!
 
I thing that helium baloon is the same but more expensive...the wire is heavy
and a little one is too resistive and delicate.
 
 Cheers: Jeff /
 
Hi Jeff
Tnx for this useful information about kites. A large balloon would be more stable if I could get enough gas.
A hot air balloon might be better but I need some design information and a large oil or bottled gas stove.
Any of these approaches seem dangerous maybe the high tower is a better idea but I was hoping to go as high as a few hundred metres, after authorisation from the local air traffic ctl centre, who would issue a NOTAM.
73 and tnx agn, its a long time since we had a LF QSO.
De Mal/G3KEV