Return-Path: Received: from rly-dc09.mx.aol.com (rly-dc09.mail.aol.com [172.19.136.38]) by air-dc10.mail.aol.com (v124.15) with ESMTP id MAILINDC103-b3d4a6556df1f; Tue, 21 Jul 2009 01:49:42 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc09.mx.aol.com (v124.15) with ESMTP id MAILRELAYINDC091-b3d4a6556df1f; Tue, 21 Jul 2009 01:49:21 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MT8Cn-0006TN-FB for rs_out_1@blacksheep.org; Tue, 21 Jul 2009 06:48:01 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MT8Cm-0006TE-M6 for rsgb_lf_group@blacksheep.org; Tue, 21 Jul 2009 06:48:00 +0100 Received: from blu0-omc1-s29.blu0.hotmail.com ([65.55.116.40]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MT8Ci-0000Oz-BZ for rsgb_lf_group@blacksheep.org; Tue, 21 Jul 2009 06:47:58 +0100 Received: from BLU146-W26 ([65.55.116.8]) by blu0-omc1-s29.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 20 Jul 2009 22:47:50 -0700 Message-ID: X-Originating-IP: [138.32.244.2] From: Laurence BY3A-KL1X China To: Date: Mon, 20 Jul 2009 21:47:50 -0800 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 21 Jul 2009 05:47:50.0911 (UTC) FILETIME=[C8B748F0:01CA09C6] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="_83d51116-e2fe-4776-b0d8-74e0d716ffe3_" Subject: RE: LF: Re: IGBT in 136 KHz TX? 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=FORGED_HOTMAIL_RCVD,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-Mailer: Unknown (No Version) --_83d51116-e2fe-4776-b0d8-74e0d716ffe3_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Jeff - The "turns" of the mains WD2XDW loop were just distanced parallel= loops running in roughly the same plane to reduce the RF copper losses an= d open up the bandwidth a bit - . I did try a couple of "turns" but never= managed to get the ommppff field. Interesting given the fact that some pe= ople use 2 turns on their K9AY's successfully - =20 =20 All the loops ends up welded together on lugs and attached to the tuner.= Ive just overhauled the tuner ready to put on line for WE2XPQ but it wil= l be running lower power for a while as I dont want to start a forest fire= in Alaska! =20 Back home in KL7 on August 14th again...just need time... =20 laurence BY3A-KL1X Tanggu China 34degC We2XPQ/ x Wd2XDW Wasilla AK =20 Subject: Re: LF: Re: IGBT in 136 KHz TX? Hello Markus and Rick! =20 I have only just acquainted myself with your messages. (Just going out from hospital, big blood pressure problem...) Thanks a lot for precious information, of what make fun still! I recovered some ferrites N87 types which should work in 137 KHZ. Another subject interests me, it is the possibility of transmitting with= a big spool of several turns (a bit as WD2XDW). But EIRP is much weaker= than with a vertical aerial, then it is necessary to "push more" in powe= r! =20 Thanks in advance! 73: Jeff / F6CWN=20 =20 _________________________________________________________________ Windows Live=99 SkyDrive=99: Store, access, and share your photos. See how= . http://windowslive.com/Online/SkyDrive?ocid=3DTXT_TAGLM_WL_CS_SD_photos_07= 2009=3D --_83d51116-e2fe-4776-b0d8-74e0d716ffe3_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Jeff - The "turns" of the mains WD2XDW loop were just distanced paral= lel loops running in roughly the same plane to reduce the RF copper losses= and open up the bandwidth a bit - . I did try a couple of "turns" bu= t never managed to get the ommppff field. Interesting given the fact that= some people use 2 turns on their K9AY's successfully -  
 
All the loops ends up welded together  on lugs and attached to the tu= ner.  Ive just overhauled the tuner ready to put on line for WE2XPQ= but it will be running lower power for a while as I dont want to start a= forest fire in Alaska!
 
Back home in KL7 on August 14th again...just need time...
 
laurence
BY3A-KL1X Tanggu China 34degC
We2XPQ/ x Wd2XDW Wasilla AK
 

 Subject: Re: LF: Re: IGBT in= 136 KHz TX?


Hello Markus and Rick!
 
I have only just acquainted myself with= your messages.
(Just going out from hospital, big blood pressure probl= em...)
Thanks a lot for precious information, of= what make fun still!
I recovered some ferrites N87 types which= should work in 137 KHZ.
Another subject interests me, it is the= possibility of transmitting with a big spool of several turns (a bit as= WD2XDW). But EIRP is much weaker than with a vertical aerial, then= it is necessary to "push more"  in power!
 
Thanks in advance!
73: Jeff / F6CWN

 

Windows Live=99 SkyDrive=99: Store, access, and share your photos. See how. =3D --_83d51116-e2fe-4776-b0d8-74e0d716ffe3_--