Return-Path: Received: from rly-dc01.mx.aol.com (rly-dc01.mail.aol.com [172.19.136.30]) by air-dc06.mail.aol.com (v126.13) with ESMTP id MAILINDC061-afe4b20216a3ae; Wed, 09 Dec 2009 17:15:31 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc01.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDC012-afe4b20216a3ae; Wed, 09 Dec 2009 17:15:07 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NIUnJ-0005a1-MK for rs_out_1@blacksheep.org; Wed, 09 Dec 2009 22:14:01 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NIUnJ-0005Zs-2t for rsgb_lf_group@blacksheep.org; Wed, 09 Dec 2009 22:14:01 +0000 Received: from smtp5.freeserve.com ([193.252.22.151] helo=smtp6.freeserve.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NIUnH-0003iQ-84 for rsgb_lf_group@blacksheep.org; Wed, 09 Dec 2009 22:14:01 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3544.me.freeserve.com (SMTP Server) with ESMTP id D352E1C00142 for ; Wed, 9 Dec 2009 23:13:53 +0100 (CET) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3544.me.freeserve.com (SMTP Server) with ESMTP id BF4051C00147 for ; Wed, 9 Dec 2009 23:13:53 +0100 (CET) Received: from AGB (unknown [91.109.5.59]) by mwinf3544.me.freeserve.com (SMTP Server) with SMTP id 605341C00142 for ; Wed, 9 Dec 2009 23:13:53 +0100 (CET) X-ME-UUID: 20091209221353394.605341C00142@mwinf3544.me.freeserve.com Message-ID: <510B0611943F48E1975A8F833B63FBD5@AGB> From: "Graham" To: References: <9afca2640912071620w15cb02c8t1e7303fd15e57b65@mail.gmail.com> In-Reply-To: <9afca2640912071620w15cb02c8t1e7303fd15e57b65@mail.gmail.com> Date: Wed, 9 Dec 2009 22:13:52 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: 500kHz simple 5W TX/RX transverter >>DATA MODES<< Content-Type: multipart/alternative; boundary="----=_NextPart_000_0096_01CA791C.E4267050" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 ------=_NextPart_000_0096_01CA791C.E4267050 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable All=20 This latest addition to the HF / MF tx convertor opens the door= to data communications on 500 ... ranging from 'all' the K1JT sy= stems through to the single carrier=20 multi tone systems of MFSK , DOMINO and THOR .. even the almos= t forgotten Amtor-arq and Packtor modes , anyone still have there= pk232 =20 listed are data modes that may be used with non-linear systems :-= =20 http://groups.google.com/group/uk500khz/web/meat-grinder-comms G..=20 From: Roger Lapthorn=20 Sent: Tuesday, December 08, 2009 12:20 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: 500kHz simple 5W TX/RX transverter Dear All, My WSPR tx up-converter has now been modified to a full TX/RX tranvert= er suitable for WSPR, QRSS and CW in a very simple way, making use of= the FT817 split facility which allows you to RX on 500kHz and TX on= 28MHz. By adding a series LC between the TX PA and the FT817 input/ou= tput RF connection (with back-to-back diodes at the L and C junction,= this allows "pass through" from the 500kHz ATU to the FT817 on RX (tu= ned to 500kHz). On TX, the diodes conduct and the C part is in paralle= l with the first cap in the TX low pass filter. This scheme is now wor= king really well with good RX sensitivity and no change in TX power ou= t. Schematic of the transverter is on my blog at http://g3xbm-qrp.blogspo= t.com/ . My attempt to add it as an attachment to an email here earlie= r failed. This more or less concludes my 500kHz experimenting, apart from gettin= g a few more CW QSOs in the log. It's been great fun all the way with= lots of support from folks here. I was going to try 136kHz, but think= I will now give this a miss for now. 73s Roger G3XBM --=20 ------------------------------------------------------------- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk G3XBM GQRP 1678 ISWL G11088 ------=_NextPart_000_0096_01CA791C.E4267050 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
All
 
This  latest  addition to&n= bsp; the =20 HF / MF  tx convertor  opens the  door to  data&nb= sp;=20 communications  on 500 ... ranging  from 'all'  the K1J= T systems=20 through to  the  single carrier
multi  tone systems  of&nbs= p; =20 MFSK  ,  DOMINO and THOR  .. even the  almost= =20 forgotten  Amtor-arq  and Packtor modes , anyone still = have=20 there pk232 
 
listed  are=20 data  modes that  may be  used with non-linear systems= :-=20
 
 
G..

Sent: Tuesday, December 08, 2009 12:20 AM
Subject: LF: 500kHz simple 5W TX/RX transverter

Dear All,

My WSPR tx up-converter has now been= modified to=20 a full TX/RX tranverter suitable for WSPR, QRSS and CW  in= a=20 very simple way, making use of the FT817 split facility which= allows you=20 to RX on 500kHz and TX on 28MHz. By adding a series LC between the TX= PA and the=20 FT817 input/output RF connection (with back-to-back diodes at the L an= d C=20 junction, this allows "pass through" from the 500kHz ATU to the FT817= on RX=20 (tuned to 500kHz). On TX, the diodes conduct and the C part is in para= llel with=20 the first cap in the TX low pass filter. This scheme is now working re= ally well=20 with good RX sensitivity and no change in TX power out.

Schemat= ic of the=20 transverter is on my blog at http://g3xbm-qrp.blogspot.com/ . My=20 attempt to add it as an attachment to an email here earlier failed.
This more or less concludes my 500kHz experimenting= , apart from=20 getting a few more CW QSOs in the log. It's been great fun all the way= with lots=20 of support from folks here. I was going to try 136kHz, but think I wil= l now give=20 this a miss for now.

73s
Roger G3XBM
--=20
-------------------------------------------------------------
<= A href=3D"http://g3xbm-qrp.blogspot.com/">http://g3xbm-qrp.blogspot.= com/
http://www.g3xbm.co.u= k
G3XBM  =20  GQRP 1678      ISWL G11088


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