Return-Path: Received: from mtain-db07.r1000.mx.aol.com (mtain-db07.r1000.mx.aol.com [172.29.64.91]) by air-mc07.mail.aol.com (v129.4) with ESMTP id MAILINMC073-a97d4c8681e776; Tue, 07 Sep 2010 14:18:15 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-db07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5D7F4380000A1; Tue, 7 Sep 2010 14:18:13 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ot2is-0001Vu-VE for rs_out_1@blacksheep.org; Tue, 07 Sep 2010 19:16:46 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ot2is-0001Vl-FE for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 19:16:46 +0100 Received: from out1.ip07ir2.opaltelecom.net ([62.24.128.243]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ot2im-0000Ef-UL for rsgb_lf_group@blacksheep.org; Tue, 07 Sep 2010 19:16:47 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Aj8FAAMehkxcB95s/2dsb2JhbACPZgORCHIPwQOFPQSBWQ X-IronPort-AV: E=Sophos;i="4.56,329,1280703600"; d="scan'208,217";a="459975882" Received: from host-92-7-222-108.as43234.net (HELO xphd97xgq27nyf) ([92.7.222.108]) by out1.ip07ir2.opaltelecom.net with SMTP; 07 Sep 2010 19:16:34 +0100 Message-ID: <001701cb4eb8$ccd018d0$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <000b01cb4eb4$caf14380$0401a8c0@xphd97xgq27nyf> Date: Tue, 7 Sep 2010 19:16:32 +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: Re: 137.5kHz WSPR Tuesday evening - reports appreciated Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01CB4EC1.2E6BEA30" 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: 3039ac1d405b4c8681e44e57 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0014_01CB4EC1.2E6BEA30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ps A class D is a broad band amp whereas a class E is a narrow band amp,= totally different design g3kev ----- Original Message -----=20 From: mal hamilton=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, September 07, 2010 6:47 PM Subject: LF: Re: 137.5kHz WSPR Tuesday evening - reports appreciated Roger=20 How can an amplifier be class D/E. The design is totally different. A class E has a totally different= drain cct configuration and matching network. de g3kev ----- Original Message -----=20 From: Roger Lapthorn=20 To: rsgb_lf_group@blacksheep.org ; Chris Osborn ; G6ALB ; James Co= wburn ; 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= -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 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= small 16mm 3C90 cores (cream colour) as the PA bifilar output transfo= rmer and I had all sorts of issues with the darn thing overheating and= even one cracking. I replaced this with a choke wound on a T106-2 cor= e 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_0014_01CB4EC1.2E6BEA30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
ps
A class D is a broad band amp whereas= a class E is=20 a narrow band amp, totally different design
g3kev
 
----- Original Message -----
From:=20 mal=20 hamilton
Sent: Tuesday, September 07,= 2010 6:47=20 PM
Subject: LF: Re: 137.5kHz WSP= R Tuesday=20 evening - reports appreciated

Roger
How can an amplifier be class D/E.<= /FONT>
The design is totally different. A= class 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= Tuesday=20 evening - reports appreciated

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

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

Not sure if anyone else has had this problem, bu= t I=20 was using the small 16mm 3C90 cores (cream colour) as the= PA bifilar=20 output transformer and I had all sorts of issues with the darn thi= ng=20 overheating and even one cracking. I replaced this with a choke wo= und on a=20 T106-2 core and made the output network work in class D/E and now= everything=20 is working very predictably. The larger diameter 3C90 cores seem= fine in the=20 step-down transformer matching the "in the air" loop.

The= WSPR beacon=20 is now going ON.....

73s
Roger G3XBM

=
--=20
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://w= ww.youtube.com/user/g3xbm
G3XBM  =20 GQRP 1678    ISWL=20 G11088
------=_NextPart_000_0014_01CB4EC1.2E6BEA30--