Return-Path: Received: from mtain-dc01.r1000.mx.aol.com (mtain-dc01.r1000.mx.aol.com [172.29.64.129]) by air-db02.mail.aol.com (v129.4) with ESMTP id MAILINDB023-86444c867b4c34f; Tue, 07 Sep 2010 13:50:04 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dc01.r1000.mx.aol.com (Internet Inbound) with ESMTP id EC8D63800008F; Tue, 7 Sep 2010 13:50:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ot2H8-0001MB-Eq for rs_out_1@blacksheep.org; Tue, 07 Sep 2010 18:48:06 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ot2H7-0001M2-Vx for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 18:48:05 +0100 Received: from out1.ip09ir2.opaltelecom.net ([62.24.128.245]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ot2H3-00005d-1N for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 18:48:06 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Aj8FADYXhkxcHYk0/2dsb2JhbACPZgORCXEPwEaFPQSBWYtN X-IronPort-AV: E=Sophos;i="4.56,329,1280703600"; d="scan'208,217";a="448270462" Received: from unknown (HELO xphd97xgq27nyf) ([92.29.137.52]) by out1.ip09ir2.opaltelecom.net with SMTP; 07 Sep 2010 18:47:53 +0100 Message-ID: <000b01cb4eb4$caf14380$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: Date: Tue, 7 Sep 2010 18:47:51 +0100 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-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: 137.5kHz WSPR Tuesday evening - reports appreciated Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01CB4EBD.2C812E00" 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-global-disposition: G x-aol-sid: 3039ac1d40814c867b4a225f X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0008_01CB4EBD.2C812E00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Roger=20 How can an amplifier be class D/E. The design is totally different. A class E has a totally different dra= in cct configuration and matching network. de g3kev ----- Original Message -----=20 From: Roger Lapthorn=20 To: rsgb_lf_group@blacksheep.org ; Chris Osborn ; G6ALB ; James Cowb= urn ; Chris Dillon ; James Moritz ; mike.dennison@ntlworld.com=20 Sent: Tuesday, September 07, 2010 5:34 PM Subject: LF: 137.5kHz WSPR Tuesday evening - reports appreciated My 137.5kHz WSPR TX transverter is now working fine, so I'll be on-a= ir with WSPR tonight (Sept 7th) from 5.30pm - 11pm UK time.=20 After my success on QRSS3 with G3XIZ I'm hopeful he'll now decode my= WSPR signal tonight, assuming Chris can take a listen. If anyone else= within, say, 100km of Burwell, Cambs JO02dg cares to take a look for= the WSPR beacon (running around 35% TX time) I'd be most grateful.=20 Not sure if anyone else has had this problem, but I was using the sm= all 16mm 3C90 cores (cream colour) as the PA bifilar output transforme= r and I had all sorts of issues with the darn thing overheating and ev= en one cracking. I replaced this with a choke wound on a T106-2 core= and made the output network work in class D/E and now everything is= working very predictably. The larger diameter 3C90 cores seem fine in= the step-down transformer matching the "in the air" loop. The WSPR beacon is now going ON..... 73s Roger G3XBM --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 ------=_NextPart_000_0008_01CB4EBD.2C812E00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Roger
How can an amplifier be class D/E.
The design is totally different. A cl= ass E has a=20 totally different drain cct configuration and matching network.=
de g3kev
 
----- Original Message -----
Sent: Tuesday, September 07,= 2010 5:34=20 PM
Subject: LF: 137.5kHz WSPR Tu= esday=20 evening - reports appreciated

My 137.5kHz WSPR TX transverter is now working fine,= so I'll be=20 on-air with WSPR tonight (Sept 7th) from 5.30pm - 11pm UK time= .=20

After my success on QRSS3 with G3XIZ I'm hopeful he'll now= decode my=20 WSPR signal tonight, assuming Chris can take a listen. If anyone els= e within,=20 say, 100km of Burwell, Cambs JO02dg cares to take a look for the WSP= R beacon=20 (running around 35% TX time) I'd be most grateful.

No= t sure if=20 anyone else has had this problem, but I was using the small= 16mm 3C90=20 cores (cream colour) as the PA bifilar output transformer and I had= all sorts=20 of issues with the darn thing overheating and even one cracking. I= replaced=20 this with a choke wound on a T106-2 core and made the output network= work in=20 class D/E and now everything is working very predictably. The larger= diameter=20 3C90 cores seem fine in the step-down transformer matching the "in= the air"=20 loop.

The WSPR beacon is now going ON.....

73s
Roge= r=20 G3XBM


--
http://g3xbm-qrp.blogspot.com/
<= A href=3D"http://www.g3xbm.co.uk" target=3D_blank>http://www.g3xbm= .co.uk
http://www.youtube.com/user/g3xbm
G3XBM &nbs= p; GQRP=20 1678    ISWL G11088
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