Return-Path: Received: (qmail 27096 invoked from network); 29 Jul 2001 19:53:51 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 29 Jul 2001 19:53:51 -0000 Received: (qmail 26466 invoked from network); 29 Jul 2001 19:53:35 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 29 Jul 2001 19:53:35 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15QwYC-0006cD-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 29 Jul 2001 20:48:32 +0100 Received: from anchor-post-30.mail.demon.net ([194.217.242.88]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15QwYA-0006c8-00 for rsgb_lf_group@blacksheep.org; Sun, 29 Jul 2001 20:48:30 +0100 Received: from boxernet.demon.co.uk ([194.222.47.214] helo=TRIXY) by anchor-post-30.mail.demon.net with smtp (Exim 2.12 #1) id 15QwXV-000CRu-0U for rsgb_lf_group@blacksheep.org; Sun, 29 Jul 2001 20:47:49 +0100 From: "Michael Probert" To: "lf group" Subject: LF: RE: QRP Tests Date: Sun, 29 Jul 2001 20:46:49 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-reply-to: <3B642E68.A3CC1672@alg.demon.co.uk> Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello All, In a direct e mail to me Steve GW4ALG wrote >>>>>>-----Original Message----- Sent: 29 July 2001 08:40 To: Michael Probert Subject: Your QRP Tests Hi Mike, What a most impressive antenna! I believe the distance between us to be 174 km. To confirm your reports: Usual power: 589 (Normally abt 300W out 3.5/4 amp ant current) 40 W: 569 10 W: 5 5/6 9 5 W: 559 1 W: 549 As you will know, QRP is generally taken to be 5 W RF output, or less. I would guess that your antenna is probably 10 dB up on my 12 m vertical.<<<<<<<<<<<<< Yes Steve I too was surprised that you were receiving me on the last test. I don't have any accurate means of measuring power output ( very basic here only multi meter & inductance meter) But the input was 3V @ 0.5amp so I guess O/P was close to 1W to the antenna. I did actually switch the PA off hoping that a few mW might creep through from the driver, but that was asking too much! It also says a lot for your RX set up. I could not hear Dave G3YMC nor F6BWO when Tom G3OLB was in qso with him. I confirm that the Tx ant. here is a coventional doublet with 60m top up 20m fed with 300ohm ribbon, strapped at feed end. Rx ant. G3LNP loop. On receive the main antenna usually is far noisier albeit with stronger signals. All of which goes to prove what we know already that a good transmitting antenna does not always work well on receive. Must get round to making Peter's (G3LDO) loop. It's the thought of soldering all those Litz wire connections that keeps putting me off! Many thanks Steve for the most interesting test. Regards to all Mike GW4HXO.