Return-Path: Received: from rly-me07.mx.aol.com (rly-me07.mail.aol.com [172.20.83.41]) by air-me09.mail.aol.com (v126.13) with ESMTP id MAILINME091-9c54b4f4c75337; Thu, 14 Jan 2010 11:55:46 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-me07.mx.aol.com (v125.7) with ESMTP id MAILRELAYINME071-9c54b4f4c75337; Thu, 14 Jan 2010 11:55:19 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NVSxK-0000jX-Ua for rs_out_1@blacksheep.org; Thu, 14 Jan 2010 16:53:58 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NVSxK-0000jO-G2 for rsgb_lf_group@blacksheep.org; Thu, 14 Jan 2010 16:53:58 +0000 Received: from out1.ip05ir2.opaltelecom.net ([62.24.128.241]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NVSxH-0002K1-Gs for rsgb_lf_group@blacksheep.org; Thu, 14 Jan 2010 16:53:58 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqIEAH/aTktZ8PwJ/2dsb2JhbACNZAbAGoswhDAE X-IronPort-AV: E=Sophos;i="4.49,275,1262563200"; d="scan'208,217";a="287915881" Received: from unknown (HELO xphd97xgq27nyf) ([89.240.252.9]) by out1.ip05ir2.opaltelecom.net with SMTP; 14 Jan 2010 16:53:27 +0000 Message-ID: <001601ca953a$163c41d0$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <000a01ca9530$c4ee97a0$0401a8c0@xphd97xgq27nyf> <9afca2641001140835y165ea810w6ccf81dd884597ad@mail.gmail.com> Date: Thu, 14 Jan 2010 16:53:24 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 1/2 wave 500 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01CA953A.16057A60" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: 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-AOL-IP: 193.82.116.20 ------=_NextPart_000_0013_01CA953A.16057A60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Roger When the wx improves I was thinking of putting up an inv V dipole for= 500 at between 100 and 120 ft is my max height. This would have a lot= more gain than my inv L at the same height. The down side would be mo= re high angle radiation because of the low height relative to waveleng= th. It would be good for local working but not the DX, too many hops, how= ever it might be worth trying. mal/g3kev ----- Original Message -----=20 From: Roger Lapthorn=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, January 14, 2010 4:35 PM Subject: Re: LF: 1/2 wave 500 Mal (et al) Modest height 100ft? That's higher than our local church tower :-)) Having said that I guess in the USA there will be those for whom thi= s is indeed a modest height and a 300m long antenna would only take up= a corner of a garden.=20 For other big antennas, see also the video of the monster 160m 3el= beam antenna at OH8X being rotated http://www.youtube.com/watch?v=3DX= CZcjqltJVA. Maybe they'll soon be putting up one for 500kHz? Best 73s Roger G3XBM 2010/1/14 mal hamilton Hi Has anyone in the USA tried a 1/2 wave dipole on 500 K/cs? inv V= design, at a modest height around 100 ft. de mal/g3kev --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XBM G3XBM GQRP 1678 ISWL G11088 ------=_NextPart_000_0013_01CA953A.16057A60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Roger
When the wx improves I was thinking= of putting up=20 an inv V dipole for 500 at between 100 and 120 ft is my max height. Th= is would=20 have a lot more gain than my inv L at the same height. The down side= would be=20 more high angle radiation because of the low height relative to= =20 wavelength.
It would be good for local working bu= t not the DX,=20  too many hops, however it might be worth trying.
 mal/g3kev
 
----- Original Message -----
Sent: Thursday, January 14,= 2010 4:35=20 PM
Subject: Re: LF: 1/2 wave 500=

Mal (et al)

Modest height 100ft? That's higher= than our=20 local church tower :-))

Having said that I guess in the USA= there will=20 be those for whom this is indeed a modest height and a 300m long ant= enna would=20 only take up a corner of a garden.

For other big antennas,= see also=20 the video of the monster 160m 3el beam antenna at OH8X being rotated= http://w= ww.youtube.com/watch?v=3DXCZcjqltJVA.=20 Maybe they'll soon be putting up one for 500kHz?

Best 73s
= Roger=20 G3XBM


2010/1/14 mal hamilton <= g3kevmal@talktalk.net= >
Hi
Has anyone in the USA tried a 1/2= wave dipole=20 on 500 K/cs? inv V design, at a modest height around 100 ft.
de mal/g3kev
 
 



--=20

http://g3xbm-= qrp.blogspot.com/
http:/= /www.g3xbm.co.uk
http://www.youtube.com/user/G3XBM
G3XBM=20    GQRP 1678      ISWL=20 G11088
------=_NextPart_000_0013_01CA953A.16057A60--