Return-Path: Received: (qmail 28975 invoked from network); 12 Jun 2003 09:01:33 -0000 Received: from netmail02.services.quay.plus.net (212.159.14.221) by mailstore with SMTP; 12 Jun 2003 09:01:33 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 1764 invoked by uid 10001); 12 Jun 2003 09:01:32 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail02.services.quay.plus.net with SMTP; 12 Jun 2003 09:01:32 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19QNvV-0002YY-Rq for rsgb_lf_group-outgoing@blacksheep.org; Thu, 12 Jun 2003 09:59:21 +0100 Received: from [213.218.75.230] (helo=smtp01.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 19QNvR-0002YJ-Uh for rsgb_lf_group@blacksheep.org; Thu, 12 Jun 2003 09:59:18 +0100 Received: (qmail 11956 invoked from network); 12 Jun 2003 08:58:46 -0000 Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.138.218]) (envelope-sender ) by smtp01.freeler.nl (qmail-ldap-1.03) with SMTP for ; 12 Jun 2003 08:58:46 -0000 Message-ID: <5.1.0.14.0.20030612104439.00a13aa0@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 12 Jun 2003 10:58:41 +0200 To: rsgb_lf_group@blacksheep.org From: "Dick Rollema" In-reply-to: <3EE7697C.6F2669C1@t-online.de> MIME-Version: 1.0 Subject: Re: LF: VLF and SW Fielday Experiment Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=0.8 required=5.0tests=EMAIL_ATTRIBUTION,HTML_10_20,HTML_FONT_BIG,HTML_MESSAGE, IN_REP_TOversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) 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: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Content-transfer-encoding: 8bit At 19:40 11-6-03 +0200, you wrote:
Hallo OM's

we are on air at our Fieldday from
Saturday, Jun. 14, 12.00 Mez to Sunday, Jun. 15, 14.00 Mez
from  Phöben, near Berlin with a 4 x 100 meter antenne, designed as a
short wave Quad Antenne. Call is DK0CQ ore DN1VLF.
Special frequencies are 136,72 KHz and 137,72 kHz(QRSS). Output power
may be 1 Watt ERP.

best regards
Klaus


When the antenna is a horizontal quad with sides of 100 metres it will radiate a horizontally polarised signal straight up ("cloud warmer").  This is of no use at LF.

A workable system would be to use the feedline with the two conductors in parallel as a vertical radiator, excited against  a good earth, the quad acting as topload.  It could turn out to be advantageous to put ground wires  on the surface below the quad wires to provide a low-loss path for the antenna currents back to the transmitter.

If the quad is to be erected in a vertical plane please forget this message.

I will be listening for your signal in normal CW.

Good luck!

73, Dick, PA0SE