Return-Path: Received: from rly-md04.mx.aol.com (rly-md04.mail.aol.com [172.20.29.142]) by air-md02.mail.aol.com (v126.13) with ESMTP id MAILINMD023-8fa4b18121d325; Thu, 03 Dec 2009 14:32:11 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md04.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMD042-8fa4b18121d325; Thu, 03 Dec 2009 14:31:43 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NGHNo-0003sw-PW for rs_out_1@blacksheep.org; Thu, 03 Dec 2009 19:30:32 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NGHNo-0003sn-B7 for rsgb_lf_group@blacksheep.org; Thu, 03 Dec 2009 19:30:32 +0000 Received: from mail-pw0-f45.google.com ([209.85.160.45]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NGHNn-0007lr-Fm for rsgb_lf_group@blacksheep.org; Thu, 03 Dec 2009 19:30:32 +0000 Received: by pwi18 with SMTP id 18so344898pwi.4 for ; Thu, 03 Dec 2009 11:30:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=Yz7TXHgGRcN5v/If45SrWGpCS2rSkqXKD++StxfEz+M=; b=gQZIGzqixzSmo1Fzpbfpox41vf+w9V4t0DJ1sngZ37Q5fyiqFjmDZOsf/dASodZLc+ Q32axKZbZ+xSBIZjOLF5HSLR4WraATvnfQ+IhlDDse7wM27kh47fz1C91+Vqo7DoDFDV MMbVGsAYJw1wLL3K7FCbxgI1fgIkIoJv/dv1A= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=fdaibtiYWNyzpLJkyesPaJs5mAaVS3XP+j8PflGWw9nkru1CE79IMsG5t2AcM8UN+v FoodziOg8TUgp0xfefl/tnojzFQJhNUMqXhnb7atc2zYfaRz4jmOSbvfhCMt4KblB/Nh 9oGj0xW/0I2/tb5++lLxFlLKds/pYAdrV4/XY= MIME-Version: 1.0 Received: by 10.140.170.13 with SMTP id s13mr120920rve.117.1259868624466; Thu, 03 Dec 2009 11:30:24 -0800 (PST) In-Reply-To: <20091203194531.or926chzk844g4k8@webmail6.kuleuven.be> References: <38A51B74B884D74083D7950AD0DD85E828AAF4@File-Server-HST.hst.e-technik.tu-darmstadt.de> <4B16987B.9000002@usa.net> <4B179DE6.3050608@usa.net> <20091203194531.or926chzk844g4k8@webmail6.kuleuven.be> Date: Thu, 3 Dec 2009 19:30:24 +0000 X-Google-Sender-Auth: 2538c60fc4b1be8c Message-ID: <1f0624b90912031130h43907489v2d13f8cfc00ec8fc@mail.gmail.com> From: Gary - G4WGT To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Results of optimising an active antenna Content-Type: multipart/alternative; boundary=000e0cd2999ed335db0479d805ba X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,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 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m211.1 ; domain : googlemail.com DKIM : fail X-Mailer: Unknown (No Version) --000e0cd2999ed335db0479d805ba Content-Type: text/plain; charset=ISO-8859-1 Rik, LF, I have run my 300 watt class D Tx at 1 watt ERP on 500kHz & my Mini-Whip is only about 4 metres away & is still working OK. Very solid design. 73, Gary - G4WGT. 2009/12/3 Rik Strobbe > Roelof, > > I cannot agree, a Belgian beer can will provide at least 10dB better SNR > ;-) > > Now serious: I have been thinking about a simple but good RX antenna for > LF, MF and the lower HF range and you mini-whip seems the right solution. > But will the preamp survive when pumping a few 100W into my 500kHz TX > antenna (lazy-L) that will be only 25m away ? > > 73, Rik ON7YD - OR7T > > > Quoting Roelof Bakker : > > Hello Alberto, >> >> I am not much in beer myself, but there seems to be a famous Dutch brand, >> that I can recommend! >> >> 73, >> Roelof, pa0rdt >> >> >> > > > --000e0cd2999ed335db0479d805ba Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Rik, LF,

I have run my 300 watt class D Tx at 1 watt ER= P on 500kHz & my Mini-Whip is only about 4 metres away & is still= working OK. Very solid design.

73,
Gary - G4WGT.

2009/12/3 Rik= Strobbe <Rik.Strobbe@fys.kuleuven.be>
Roelof,

I cannot agree, a Belgian beer can will provide at least 10dB better SNR= ;-)

Now serious: I have been thinking about a simple but good RX antenna for= LF, MF and the lower HF range and you mini-whip seems the right solution.=
But will the preamp survive when pumping a few 100W into my 500kHz TX ante= nna (lazy-L) that will be only 25m away ?

73, Rik =A0ON7YD - OR7T


Quoting Roelof Bakker <roelof@ndb.demon.nl>:

Hello Alberto,

I am not much in beer myself, but there seems to be a famous Dutch brand,<= br> that I can recommend!

73,
Roelof, pa0rdt






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