Delivered-To: daveyxm@virginmedia.com
Received: by 10.50.57.9 with SMTP id e9csp76642igq;
Fri, 5 Jul 2013 12:40:12 -0700 (PDT)
X-Received: by 10.15.21.199 with SMTP id d47mr13669523eeu.36.1373053212191;
Fri, 05 Jul 2013 12:40:12 -0700 (PDT)
Return-Path: <owner-rsgb_lf_group@blacksheep.org>
Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25])
by mx.google.com with ESMTP id i44si7495660eew.307.2013.07.05.12.40.10
for <daveyxm@virginmedia.com>;
Fri, 05 Jul 2013 12:40:12 -0700 (PDT)
Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25;
Authentication-Results: mx.google.com;
spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org
Received: from majordom by post.thorcom.com with local (Exim 4.14)
id 1UvApS-0001Iy-A7
for rs_out_1@blacksheep.org; Fri, 05 Jul 2013 19:33:58 +0100
Received: from [195.171.43.32] (helo=relay1.thorcom.net)
by post.thorcom.com with esmtp (Exim 4.14)
id 1UvApR-0001Ip-Q3
for rsgb_lf_group@blacksheep.org; Fri, 05 Jul 2013 19:33:57 +0100
Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk)
by relay1.thorcom.net with esmtp (Exim 4.77)
(envelope-from <g8fzk@g8fzk.fsnet.co.uk>)
id 1UvApP-000439-NE
for rsgb_lf_group@blacksheep.org; Fri, 05 Jul 2013 19:33:56 +0100
Received: from AGB ([95.145.211.218])
by mwinf5d42 with ME
id wiZu1l00X4jGl6f03iZuda; Fri, 05 Jul 2013 20:33:55 +0200
Message-ID: <BBB4DFFFEBF84249A4CCD33AF05566BB@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
Date: Fri, 5 Jul 2013 19:33:54 +0100
MIME-Version: 1.0
X-Priority: 3
X-MSMail-Priority: Normal
Importance: Normal
X-Mailer: Microsoft Windows Live Mail 14.0.8117.416
X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416
X-Spam-Score: 0.0 (/)
X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has
identified this incoming email as possible spam. The original message
has been attached to this so you can view it (if it isn't spam) or label
similar future email. If you have any questions, see
the administrator of that system for details.
Content preview: There is a good example of Mini-whip V 40 ft end fed vertical
, db levels are the average over 32 mins , so that would tend to give a realistic
evaluation , as opposed to peak , which would reflect one major incident
during the time lime [...]
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
[80.12.242.59 listed in list.dnswl.org]
0.0 HTML_MESSAGE BODY: HTML included in message
X-Scan-Signature: b0c81be0f3328ec24fe2fd5b2fd44f86
Subject: Fw: LF: Wellbrook RX loops
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0051_01CE79B6.95E848C0"
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com
X-Spam-Level:
X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE,
HTML_MESSAGE,MISSING_OUTLOOK_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
Status: O
X-Status:
X-Keywords:
X-UID: 45
This is a multi-part message in MIME format.
------=_NextPart_000_0051_01CE79B6.95E848C0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
There is a good example of Mini-whip V 40 ft end fed vertical =
, db levels are the average over 32 mins , so that would tend =
to give a realistic evaluation , as opposed to peak , which =
would reflect one major incident during the time lime=20
Stations about 25 miles apart west<>east=20
G..
23:02 136 G3XDV de G4WGT Op32 160 mi -12 dB in Chorley, IO83qo with 0.3w =
+ Inv-L
23:02 136 G3XDV de G0NBD Op32 163 mi -23 dB in Nr Liverpool with 0.3w + =
Inv-L
From: DENNIS EASTERLING=20
Sent: Friday, July 05, 2013 5:26 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: Re: LF: Wellbrook RX loops
Hi Roger
I use a Wellbrook Loop type ALA1530 (MW/HF) mounted 1m off the ground =
and a PA0RDT mini-whip mounted about 7m above ground. Sometimes the =
loop wins other times the miniwhip. The miniwhip is omnidirectional =
and uses the e field, whereas the loop is directional and uses the =
magnetic field. The miniwhip is more open to BC breakthough than the =
loop but more sensitive. I tend to monitor with the miniwhip, and =
switch to the loop after homing in on the signal if this helps. BC =
breakthough is overcome using a simple series LC circuit tuned to the =
required band at the RX end of the coax. The QRM at my QRT can be =
horrendous, as I am only 100 yards from the OH lines on the East Coast =
main railway line, surrounded by houses and a block of flats with =
associated busy roads. My 'T' transmitting aerial 8m high is useless =
for RX. I can fully recommend both miniwhip and Wellbrook Loop, both =
of which cover from LF to 10m. For best results, I suppose a tuned =
loop about 1m square has the edge, but not as convenient.=20
73 Dennis M0JXM
From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>; =
rsgb_lf_group@yahoogroups.co.uk=20
Sent: Friday, 5 July 2013, 7:00
Subject: LF: Wellbrook RX loops
Can anyone advise, from actual use, how well a Wellbrook loop works on =
136 and 472kHz RX ? The excellent OIP2 and OIP3 figures and directivity =
suggest one could be very useful.=20
73s
Roger G3XBM
------=_NextPart_000_0051_01CE79B6.95E848C0
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23501"></HEAD>
<BODY style=3D"PADDING-LEFT: 10px; PADDING-RIGHT: 10px; PADDING-TOP: =
15px"=20
id=3DMailContainerBody leftMargin=3D0 topMargin=3D0 =
CanvasTabStop=3D"true"=20
name=3D"Compose message area">
<DIV> </DIV>
<DIV>There is a good example of =20
Mini-whip V 40 ft end fed vertical , =
db=20
levels are the average over 32 mins , =
so =20
that would tend to give a =20
realistic evaluation , as opposed =
to peak ,=20
which would reflect one major incident=20
during the time lime </DIV>
<DIV> </DIV>
<DIV>Stations about 25 miles apart =20
west<>east </DIV>
<DIV> </DIV>
<DIV>G..</DIV>
<DIV> </DIV>
<DIV>
<P><STRONG>23:02 136 G3XDV de G4WGT Op32 160 mi -12 dB in Chorley, =
IO83qo with=20
0.3w + Inv-L</STRONG></P><FONT color=3D#0000ff size=3D3><FONT =
color=3D#0000ff size=3D3>
<P><STRONG>23:02 136 G3XDV de G0NBD Op32 163 mi -23 dB in Nr Liverpool =
with 0.3w=20
+ Inv-L</STRONG></P></FONT></FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV style=3D"FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A=20
title=3Ddennis.easterling@btinternet.com=20
href=3D"mailto:dennis.easterling@btinternet.com">DENNIS EASTERLING</A> =
</DIV>
<DIV><B>Sent:</B> Friday, July 05, 2013 5:26 PM</DIV>
<DIV><B>To:</B> <A title=3Drsgb_lf_group@blacksheep.org=20
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
</DIV>
<DIV><B>Subject:</B> Re: LF: Wellbrook RX loops</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: #fff; FONT-FAMILY: times new roman, new york, =
times, serif; COLOR: #000; FONT-SIZE: 12pt">
<DIV style=3D"RIGHT: auto"><SPAN style=3D"RIGHT: auto">Hi =
Roger</SPAN></DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: =
times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: =
16px; RIGHT: auto"><SPAN=20
style=3D"RIGHT: auto"></SPAN> </DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: =
times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: =
16px; RIGHT: auto"><SPAN=20
style=3D"RIGHT: auto">I use a Wellbrook Loop type ALA1530 =
(MW/HF) <VAR=20
id=3Dyui-ie-cursor></VAR> mounted 1m off the ground and a PA0RDT =
mini-whip=20
mounted about 7m above ground. Sometimes the loop wins =
other=20
times the miniwhip. The miniwhip is omnidirectional and uses =
the e=20
field, whereas the loop is directional and uses the magnetic =
field. =20
The miniwhip is more open to BC breakthough than the loop but more=20
sensitive. I tend to monitor with the miniwhip, and switch =
to the=20
loop after homing in on the signal if this helps. BC =
breakthough is=20
overcome using a simple series LC circuit tuned to the required band at =
the RX=20
end of the coax. The QRM at my QRT can be horrendous, as I =
am only=20
100 yards from the OH lines on the East Coast main railway line, =
surrounded by=20
houses and a block of flats with associated busy roads. My =
'T'=20
transmitting aerial 8m high is useless for RX. I can =
fully=20
recommend both miniwhip and Wellbrook Loop, both of which cover from LF =
to=20
10m. For best results, I suppose a tuned loop about 1m=20
square has the edge, but not as convenient. </SPAN></DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: =
times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: =
16px; RIGHT: auto"><SPAN=20
style=3D"RIGHT: auto"></SPAN> </DIV>
<DIV=20
style=3D"BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: =
times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: =
16px; RIGHT: auto"><SPAN=20
style=3D"RIGHT: auto">73 Dennis M0JXM</SPAN></DIV>
<DIV><BR></DIV>
<DIV=20
style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 12pt">
<DIV=20
style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 12pt">
<DIV style=3D"RIGHT: auto" dir=3Dltr>
<DIV=20
style=3D"BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; =
PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; =
PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px =
solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px"=20
class=3Dhr contentEditable=3Dfalse readonly=3D"true"></DIV><FONT =
size=3D2=20
face=3DArial><B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Roger =
Lapthorn=20
<rogerlapthorn@gmail.com><BR><B><SPAN=20
style=3D"FONT-WEIGHT: bold">To:</SPAN></B> =
"rsgb_lf_group@blacksheep.org"=20
<rsgb_lf_group@blacksheep.org>; rsgb_lf_group@yahoogroups.co.uk=20
<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, 5 July =
2013,=20
7:00<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> LF: =
Wellbrook RX=20
loops<BR></FONT></DIV>
<DIV class=3Dy_msg_container><BR>Can anyone advise, from actual =
use, how=20
well a Wellbrook loop works on 136 and 472kHz RX ? The excellent OIP2 =
and OIP3=20
figures and directivity suggest one could be very useful. =
<BR><BR>73s<BR>Roger=20
G3XBM<BR><BR><BR></DIV></DIV></DIV></DIV></BODY></HTML>
------=_NextPart_000_0051_01CE79B6.95E848C0--