Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db02.r1000.mx.aol.com (Internet Inbound) with ESMTP id CB7983800009D; Sat, 20 Oct 2012 15:18:44 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TPeY8-0002iI-7M for rs_out_1@blacksheep.org; Sat, 20 Oct 2012 20:17:32 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TPeY4-0002i9-1h for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 20:17:28 +0100 Received: from mail-bk0-f43.google.com ([209.85.214.43]) by relay1.thorcom.net with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from ) id 1TPeY1-0002CE-Nj for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 20:17:26 +0100 Received: by mail-bk0-f43.google.com with SMTP id w5so546638bku.16 for ; Sat, 20 Oct 2012 12:17:24 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=y8h46K7zf7LyjNhKSvDakR2if4GtDgRstdhoDTzpPn0=; b=Sp2xwMC6GyaEYG/p3mNjqqE0TC2FH2ynLkXXwvGVxgz38E/SyfLta1DAUCFypt6WQZ XgP0RICCPIcCqUzFih5HnGbtQ5UXjQi9aY08hpqe0WLWJ+5UG1nnr8hWVTQu9DDXgmNH JHJi1iahfNWzENPoTfWePb6VmkemD9tHMJ+tm6wEzii6gJvWnqDlxlo1kRJyuEJs/gM7 dt22dCqF7Ns+TpvGKO1OvKwoUQS7E5RI70HPnaIHvj8Oqnua/aXcXDfo6uH27xs9ZXle DgF/e3u2mQPmxNLEGGwxYMJxBDs3Z+oXIl8u62yaDnge/XnGSVW3aSZDdz6zI8yl9Sv/ 6YSg== MIME-Version: 1.0 Received: by 10.204.151.26 with SMTP id a26mr1414816bkw.43.1350760644250; Sat, 20 Oct 2012 12:17:24 -0700 (PDT) Received: by 10.204.170.136 with HTTP; Sat, 20 Oct 2012 12:17:24 -0700 (PDT) In-Reply-To: <5082EA26.2010902@broadpark.no> References: <5082EA26.2010902@broadpark.no> Date: Sat, 20 Oct 2012 20:17:24 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Thank you for your kind words Steiner. There are a couple of errors on my schematic that I must correct (T50-2 red, not T50-6 yellow in the buffer and the wrong value of coupling cap between the LO and buffer). I measured the harmonic output on a friend's spectrum analyser today. If you are not using a sharply tuned antenna like a loop or short Marconi (like me) then I recommend adding an additional low pass filter on the output. The one on GW3UEP's page would be ideal. (6n8s and a 15uH inductor). [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.214.43 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rogerlapthorn[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 0cdfd8d5ce44f1724c623c4ac9f44df6 Subject: Re: LF: My 500kHz 10W Transverter is almost ready Content-Type: multipart/alternative; boundary=0015175cd0f8608b5c04cc82786a X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNSAFE,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-SCOLL-AUTHENTICATION: mtain-db02.r1000.mx.aol.com ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40565082f9142572 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0015175cd0f8608b5c04cc82786a Content-Type: text/plain; charset=ISO-8859-1 Thank you for your kind words Steiner. There are a couple of errors on my schematic that I must correct (T50-2 red, not T50-6 yellow in the buffer and the wrong value of coupling cap between the LO and buffer). I measured the harmonic output on a friend's spectrum analyser today. If you are not using a sharply tuned antenna like a loop or short Marconi (like me) then I recommend adding an additional low pass filter on the output. The one on GW3UEP's page would be ideal. (6n8s and a 15uH inductor). 73s Roger G3XBM On 20 October 2012 19:15, Steinar Aanesland wrote: > > Hi all, > > My 500kHz 10W Transverter is almost ready (just a little cosmetic > remains) . > https://dl.dropbox.com/u/16381257/MF_transverter.jpg > > A big thanks to Roger G3XBM for this nice and simple design. > https://sites.google.com/site/g3xbmqrp/Home/472khz-transverter > > I don't have the the right equipment for testing the output, but the 15W > 50ohm dummy load is getting really hot . > > The big issue now is the antenna. My first thought was a kind of a T( > top hat)-antenna, but I have a loop antenna about 80 meter in > circumference and 6/7 meter above the ground . What about using the loop > as a capacity on the top of a vertical or using the loop as an ordinary > loop antenna for 600m ? > > -- > LA5VNA Steinar > loc:JO59jq > Mal and spam filtering: STRONG > www.opera.no > > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk https://sites.google.com/site/sub9khz/ http://qss2.blogspot.com/ --0015175cd0f8608b5c04cc82786a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Thank you for your kind words Steiner.

There are a couple of errors= on my schematic that I must correct (T50-2 red, not T50-6 yellow in the bu= ffer and the wrong value of coupling cap between the LO and buffer). I meas= ured the harmonic output on a friend's spectrum analyser today. If you = are not using a sharply tuned antenna like a loop or short Marconi (like me= ) then I recommend adding an additional low pass filter on the output. The = one on GW3UEP's page would be ideal. (6n8s and a 15uH inductor).

73s
Roger G3XBM

On 20 October 2012= 19:15, Steinar Aanesland <saanes@broadpark.no> wrote:
=

Hi all,

My 500kHz 10W Transverter is almost ready (just a little cosmetic
remains) .
https://dl.dropbox.com/u/16381257/MF_transverter.jpg

A big thanks to Roger G3XBM for this nice and simple design.
https://sites.google.com/site/g3xbmqrp/Home/472khz-transv= erter

I don't have the the right equipment for testing the output, but the 15= W
50ohm dummy load is getting really hot .

The big issue now is the antenna. My first thought was a kind of a T(
top hat)-antenna, but I have a loop antenna about 80 meter in
circumference and 6/7 meter above the ground . What about using the loop as a capacity on the top of a vertical or using the loop as an ordinary
loop antenna for 600m ?

--
LA5VNA Steinar
loc:JO59jq
Mal and spam filtering: STRONG
www.opera.no





--
=A0http://g3xbm-qrp.blogspot.com/
= http://www.g3xbm.co.uk
https://sites.google.com/site/sub9= khz/
http://qss2.blogspot.com/

=
--0015175cd0f8608b5c04cc82786a--