Return-Path: Received: from rly-mc08.mx.aol.com (rly-mc08.mail.aol.com [172.21.164.92]) by air-mc03.mail.aol.com (v125.7) with ESMTP id MAILINMC033-d8a4aae591229e; Mon, 14 Sep 2009 10:54:47 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mc08.mx.aol.com (v125.7) with ESMTP id MAILRELAYINMC082-d8a4aae591229e; Mon, 14 Sep 2009 10:54:12 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MnCvB-0001Yo-84 for rs_out_1@blacksheep.org; Mon, 14 Sep 2009 15:52:49 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MnCvA-0001Yf-QX for rsgb_lf_group@blacksheep.org; Mon, 14 Sep 2009 15:52:48 +0100 Received: from mail-ew0-f225.google.com ([209.85.219.225]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MnCu6-0004D2-7Y for rsgb_lf_group@blacksheep.org; Mon, 14 Sep 2009 15:51:43 +0100 Received: by ewy25 with SMTP id 25so1108069ewy.33 for ; Mon, 14 Sep 2009 07:52:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=uMHLL9BeA/Qar3hKGt83Qj/jqXon+T2+9Lp0W01Qg+I=; b=Jnw4doEDPBZl2MT2uulNvn3O5+MEQJ2HIU9TTQ2/s8lqJHknofXYLSrzhawvGGeZSM 30LNVjiONMYJ57IaBY/Zfg1VqSCgHRy6vilRDXLBywsR2U31ktjWuJIuy9rUG1yxFHu8 Nbjfr+118TwvACHF5OLzHmTvv45MxyDrX/JR0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=ARvuvzasID4ajMpWoej1CibIQBwudpMraouV+saQJts58RhnLN3e3GfELwby0Phbk9 jcoeXln+2wlO76eUENmZO9KS2Z3aLpHuU4D/bRKlkTVar/B72iOTBkkrRaFMyb81NGid umRm+gixAOizVOVfr/9Gg/mYyuqvFFhxj8JNU= MIME-Version: 1.0 Received: by 10.216.46.73 with SMTP id q51mr1115467web.20.1252939953588; Mon, 14 Sep 2009 07:52:33 -0700 (PDT) Date: Mon, 14 Sep 2009 15:52:33 +0100 Message-ID: <9afca2640909140752n7220541ahaf026ae327fe3504@mail.gmail.com> From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: LF: Further QRPpp tests on 500kHz - TX power reduced another 10dB Content-Type: multipart/alternative; boundary=0016364d2abbdbd80d04738ad02c X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY 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-d226.1 ; domain : gmail.com DKIM : fail X-Mailer: Unknown (No Version) --0016364d2abbdbd80d04738ad02c Content-Type: text/plain; charset=ISO-8859-1 This afternoon I fired up my 700mW 500kHz WSPR beacon and wet string (ERP microwatts) and got 3 reports from G3XVL at 61kms. So, I tried putting a 6dB then a 10dB attenuator between the PA and the ATU. Even with the power from the PA of just 70mW (never mind what that would be as ERP from the antenna) he still gave me a -25dB S/N report! These were the three reports in reverse ordder: 2009-09-14 14:42 G3XBM 0.503829 -25 1 JO02dg 0.001 G3XVL JO02nb 61 112 2009-09-14 14:40 G3XBM 0.503827 -23 1 JO02dg 0.001 G3XVL JO02nb 61 112 2009-09-14 14:36 G3XBM 0.503823 -18 1 JO02dg 0.001 G3XVL JO02nb 61 112 73s Roger G3XBM -- ------------------------------------------------------------- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk G3XBM GQRP 1678 ISWL G11088 --0016364d2abbdbd80d04738ad02c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable This afternoon I fired up my 700mW 500kHz WSPR beacon and wet string (ERP= microwatts) and got 3 reports from G3XVL at 61kms.

So, I tried pu= tting a 6dB then a 10dB attenuator between the PA and the ATU. Even with= the power from the PA of just 70mW (never mind what that would be as ERP= from the antenna) he still gave me a -25dB S/N report! These were the thr= ee reports in reverse ordder:

=A0-25=A0
=A02009-09-14= 14:42=A0=A0G3XBM=A0=A00.503829=A0=A01=A0=A0JO02dg=A0=A00.001=A0=A0G3XVL= =A0=A0JO02nb=A0 =A061=A0=A0112=A0
=A02009-09-14 14:40=A0=A0G3XBM=A0=A00.503827=A0=A0-23=A0 =A01=A0=A0JO02dg=A0=A00.001=A0=A0G3XVL= =A0=A0JO02nb=A0 =A061=A0=A0112=A0
=A02009-09-14 14:36=A0=A0G3XBM=A0=A00.503823=A0=A0-18=A0 =A01=A0=A0JO02dg=A0=A00.001=A0=A0G3XVL= =A0=A0JO02nb=A0 =A061=A0=A0112=A0

73s
R= oger
G3XBM

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http://g3xbm-qrp.blogspot.com/<= /a>
http://www.g3xbm.co.uk
G3= XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
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