Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 265A0380000A6; Sat, 20 Oct 2012 17:10:53 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TPgIb-0002yJ-2b for rs_out_1@blacksheep.org; Sat, 20 Oct 2012 22:09:37 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TPgIa-0002yA-9b for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 22:09:36 +0100 Received: from eterpe-smout.broadpark.no ([80.202.8.16]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TPgIY-0002Pr-Dc for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 22:09:35 +0100 MIME-version: 1.0 Received: from ignis-smin.broadpark.no ([80.202.8.11]) by eterpe-smout.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTP id <0MC700DURMRW3BA0@eterpe-smout.broadpark.no> for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 23:09:32 +0200 (CEST) Received: from [127.0.0.1] ([84.48.212.1]) by ignis-smin.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTPA id <0MC700D87MRUL170@ignis-smin.broadpark.no> for rsgb_lf_group@blacksheep.org; Sat, 20 Oct 2012 23:09:32 +0200 (CEST) Message-id: <5083130A.9080509@broadpark.no> Date: Sat, 20 Oct 2012 23:09:30 +0200 From: Steinar Aanesland User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 To: rsgb_lf_group@blacksheep.org References: <5082EA26.2010902@broadpark.no> In-reply-to: X-Spam-Score: -1.1 (-) 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: Hi Roger Yes , I thought I saw a red and not a yellow one in your picture ;) I believe you are referring to the C11 when you are writing "wrong value of coupling cap" . What is the new value you propose to use instead of 470nF? [...] Content analysis details: (-1.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [80.202.8.16 listed in list.dnswl.org] -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 4c0633a540d76adc241b9d3cede72a57 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Subject: Re: LF: My 500kHz 10W Transverter is almost ready X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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: 3039ac1d608d5083135d0ac3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Roger Yes , I thought I saw a red and not a yellow one in your picture ;) I believe you are referring to the C11 when you are writing "wrong value of coupling cap" . What is the new value you propose to use instead of 470nF? LA5VNA Steinar loc:JO59jq Mal and spam filtering: STRONG www.opera.no Den 20.10.2012 21:17, skrev Roger Lapthorn: > 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 >> >> >> > >