Return-Path: Received: from rly-mg02.mx.aol.com (rly-mg02.mail.aol.com [172.20.83.108]) by air-mg07.mail.aol.com (v124.15) with ESMTP id MAILINMG072-9fa4a8d8854367; Thu, 20 Aug 2009 13:31:22 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg02.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMG024-9fa4a8d8854367; Thu, 20 Aug 2009 13:31:02 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MeBSE-0008F5-Ut for rs_out_1@blacksheep.org; Thu, 20 Aug 2009 18:29:38 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MeBSE-0008Ew-ER for rsgb_lf_group@blacksheep.org; Thu, 20 Aug 2009 18:29:38 +0100 Received: from ttsmtp-4.cpwnetworks.com ([62.24.128.245] helo=ttsmtp.cpwnetworks.com) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MeBRW-0002oK-8c for rsgb_lf_group@blacksheep.org; Thu, 20 Aug 2009 18:28:55 +0100 X-Path: TalkTalk-smtp X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Aq8EAPckjUpOkJBO/2dsb2JhbACFBNQUhBgFgU8 Received: from unknown (HELO mal769a60aa920) ([78.144.144.78]) by ttsmtp.cpwnetworks.com with SMTP; 20 Aug 2009 18:29:10 +0100 Message-ID: <002901ca21bb$ba45ad90$0301a8c0@mal769a60aa920> From: "mal hamilton" To: References: , <002e01ca2057$32c9a5c0$0900a8c0@AM> <4A8B9246.29046.10FABD@dave.davesergeant.com> <20090819130355.252210@gmx.net> <4D0A429582694836812C0FB6FDCADEDD@mjusamsung> Date: Thu, 20 Aug 2009 18:29:09 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Re: Tree noise Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Like I have said in the past several times I am surprised how many LF/MF operators have loops strung from tree branches and in amongst trees and claim they are perfect, especially those in the USA. Most of the rf is being absorbed by the trees, perhaps a little escapes. Compared to loops little and large sited out in the clear they are poor performers at LF/MF Serious LF/MF operators should look for a QTH out in the clear avoiding serious obstacles like trees and close in buildings. Why struggle to reinvent the wheel when one has options like CABLE, MOBILE PHONES AND THE INTERNET to surf and chase LL DX. g3kev ----- Original Message ----- From: "Mike Underhill" To: Sent: Thursday, August 20, 2009 11:44 AM Subject: LF: Re: Tree noise > Dennis (DL6NVC) > Please could you try your loop away from the tree. Preferably more than 2 > metres. I have found severe bio-electric(?) noise from trees from 3.5 to > 500MHz.using loops, whips and UHF Yagis. The noise drops to almost zero > if > the tree ambient temperature is below about zero Celsius. > Mike - G3LHZ > > ----- Original Message ----- > From: "Dennis" > To: > Sent: Wednesday, August 19, 2009 2:03 PM > Subject: LF: Re: 500kHz qrg range* THANKS! > > >> >>> 2. Most of the time there is a terrible broadband noise present in my >>> home location, which blocks everything below 14MHz and even degrades >>> Polskie Radio I on 225kHz and BBC4 198kHz (with the rx loop outside the >>> house in a tree). That's the reason why I did not report any reception >>> on >>> 500kHz in the last weeks. There simply wasn't anything to receive... >>> Although in a few kHz bandwidth this broadband noise of course does not >>> equal the fieldstrengh of a local broadcast station, the broader the >>> filter, the higher the level, unneccesary loading the mixer. >> >> vy73 >> Dennis >> DL6NVC >> >> >> >> >> >> >> >> >> -- >> Neu: GMX Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate >> für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02 >> >> > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database: 270.13.61/2314 - Release Date: 08/19/09 18:06:00