Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wAN1idtY011461 for ; Fri, 23 Nov 2018 02:44:45 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gQ0RX-0008KW-GF for rs_out_1@blacksheep.org; Fri, 23 Nov 2018 01:39:39 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gQ0RV-0008KN-Vl for rsgb_lf_group@blacksheep.org; Fri, 23 Nov 2018 01:39:37 +0000 Received: from smtp-out-4.talktalk.net ([62.24.135.68]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gQ0RU-0007A0-83 for rsgb_lf_group@blacksheep.org; Fri, 23 Nov 2018 01:39:36 +0000 Received: from mal ([88.104.1.72]) by smtp.talktalk.net with SMTP id Q0RTgELo8oI6LQ0RTgxRDP; Fri, 23 Nov 2018 01:39:35 +0000 X-DKIM-Result: Domain=talktalk.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=talktalk.net; s=cmr1711; t=1542937175; bh=/X+W/9pltYSxHr1duqtJdcG8CjZPkzG1S4FMK+XwJbQ=; h=From:To:References:In-Reply-To:Subject:Date; b=K4QqTB15dNEqHpyEuMv7DKyqn+cAZC1bqhl0xTY6lB78nON29VT9lyH7ALzeIHG9v AJK8z16x5Wqy7KcCarAxR/2PjV8830RpOmFGthCwX/bcNdlo248/TwaOQ0n4FLPyx9 6jlqLTVHhAzlgSN21AHMgfHFkkcF2VYeHPtB3w3o= X-Originating-IP: [88.104.1.72] X-Spam: 0 X-OAuthority: v=2.3 cv=FOE1Odgs c=1 sm=1 tr=0 a=oLFlnT8c2Bb0h2QgbgxInQ==:117 a=oLFlnT8c2Bb0h2QgbgxInQ==:17 a=r77TgQKjGQsHNAKrUKIA:9 a=F3M5lZpKAAAA:8 a=nN7BH9HXAAAA:8 a=ECeG2ODSdn_MVCgAb-QA:9 a=QEXdDO2ut3YA:10 a=69EAbJreAAAA:8 a=w9SZ0DL5GadxHlkXkXMA:9 a=TL2l-Z97WqlVQ7NP:21 a=_W_S_7VecoQA:10 a=slCku8JSH3TyizEDQ3pD:22 Message-ID: From: To: References: In-Reply-To: Date: Fri, 23 Nov 2018 01:39:35 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 16.4.3528.331 X-MimeOLE: Produced By Microsoft MimeOLE V16.4.3528.331 X-CMAE-Envelope: MS4wfKwxDZTbDyepzTI9gr0HrD4mahfqsZ27T5A9qMN0Ayo70r+bUxGJlIE5CW1ylfWvjI9D5pYEVChz4jRZwtDoFpeD4qUQIY6dY1AlERu8CCPB8uSH4/UQ CdcrveopyBUArN/MRu9kMIR5VdJB29xFc3YpLZI/HOxKAsx8a4QJdiwU X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Laurence This is what I have found at my QTH. It stands to reason that the capture area of a small loop is no match for an array of resonant wires at 100ft in my case spread over about 5 acres of open [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [62.24.135.68 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 29f208b223fe7a2cb359508e38e2ea2d Subject: LF: Re: ANTENNAS Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01D482CD.64187CE0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MISSING_OUTLOOK_NAME,NO_REAL_NAME 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 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01D482CD.64187CE0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Laurence This is what I have found at my QTH. It stands to reason that the = capture area of a small loop is no match for an array of resonant wires = at 100ft in my case spread over about 5 acres of open countryside.=20 Some commercial radio stations years ago that used Rhombics changed to = compact monopole arrays with suitable amplifiers and distribution = networks but they did not achieve the same results as the simple Rhombic = antennas. The Rhombics had far more signal capture area. Weak signals = that were audible on the Rhombics were inaudible or way down in strength = on the Monopole system. The monopole antenna is compact like the loop = and is satisfactory when signals are medium to strong. 73 mal/g3kev From: Laurence KL7 L=20 Sent: Thursday, November 22, 2018 6:41 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: ANTENNAS im really suprised on that large differential Mal - im presuming all = your other wire antenna were grounded/non resonate during these tests? I = would expect a dB either way dependant on your local noise or signal = angle - but S points difference? happy thanksgiving! Laurence KL7L/AM Mid Pacific On Nov 22, 2018, at 7:41 AM, "g3kevmal@talktalk.net" = wrote: Someone recently mentioned the Wellbrook loop. I borrowed a Wellbrook loop for antenna comparisons a while back. Weak = signals on MF that i could copy with my 1/4 wave inv L on MF and also my = 160m inv L also used to RX on MF. I could not even hear these weak = signals on the Loop. I could copy stronger signals on the Loop but these were 2 to 3 S = units down on the above wire antennas. A vertical loop is not ideal for all round listening except it is = rotatable, but could be useful to null out noise at a noisy QTH A resonated length of wire as long as possible would be a better = choice for all round listening de G3KEV ------=_NextPart_000_000D_01D482CD.64187CE0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Laurence
This is what I have found at my QTH.   It stands to = reason that=20 the capture area of a small loop is no match for an array of resonant = wires at=20 100ft in my case spread over about 5 acres of open countryside.
 
Some commercial radio stations years ago that used Rhombics changed = to=20 compact  monopole arrays with suitable amplifiers and distribution = networks=20 but they did not achieve the same results as the simple Rhombic = antennas. The=20 Rhombics had far more signal capture area. Weak signals that were = audible on the=20 Rhombics were inaudible or way down in strength on the Monopole system. = The=20 monopole antenna is compact like the loop and is satisfactory when = signals are=20 medium to strong.
 
73 mal/g3kev
 
 
From: Laurence KL7 L
Sent: Thursday, November 22, 2018 6:41 PM
To: rsgb_lf_group@blacksheep.org =
Subject: Re: LF: ANTENNAS
 
im really suprised on that large differential Mal - im presuming = all your=20 other wire antenna were grounded/non resonate during these tests? I = would expect=20 a dB either way dependant on your local noise or signal angle - but S = points=20 difference?
 
happy thanksgiving!
 
Laurence KL7L/AM Mid Pacific
 
 

On Nov 22, 2018, at 7:41 AM, "g3kevmal@talktalk.net"=20 <g3kevmal@talktalk.net> wrote:

Someone recently mentioned the Wellbrook loop.
 
I borrowed a Wellbrook loop for antenna comparisons a while back. = Weak=20 signals on MF that i could copy with my 1/4 wave inv L on MF and also = my 160m=20 inv L also used to RX on MF. I could not even hear these weak signals = on the=20 Loop.
I could copy stronger signals on the Loop but these were 2 to 3 S = units=20 down on the above wire antennas.
A vertical loop is not ideal for all round listening except it is = rotatable, but could be useful to null out noise at a noisy QTH
A resonated length of wire as long as possible would be a better = choice=20 for all round listening
de G3KEV
=
 
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