Return-Path: Received: (qmail 3510 invoked from network); 19 Mar 2004 08:47:20 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore03.plus.net with SMTP; 19 Mar 2004 08:47:20 -0000 Received: (qmail 84682 invoked from network); 19 Mar 2004 08:47:20 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 19 Mar 2004 08:47:18 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1B4Few-000LsX-PC for dave@picks.force9.co.uk; Fri, 19 Mar 2004 08:47:18 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1B4FeU-000262-Os for rs_out_1@blacksheep.org; Fri, 19 Mar 2004 08:46:50 +0000 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1B4FeU-00025s-6m for rsgb_lf_group@blacksheep.org; Fri, 19 Mar 2004 08:46:50 +0000 Received: from imo-m24.mx.aol.com ([64.12.137.5]) by relay.salmark.net with esmtp (Exim 4.24) id 1B4NZE-00042r-Fg for rsgb_lf_group@blacksheep.org; Fri, 19 Mar 2004 17:13:56 +0000 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m24.mx.aol.com (mail_out_v37_r1.2.) id l.23.3c36a8ef (3996) for ; Fri, 19 Mar 2004 03:46:12 -0500 (EST) From: G0MRF@aol.com Message-ID: <23.3c36a8ef.2d8c0d54@aol.com> Date: Fri, 19 Mar 2004 03:46:12 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 X-Spam-Score: 1.8 (+) X-Spam-Report: 0.3 NO_REAL_NAME From: does not include a real name 0.5 HTML_40_50 BODY: Message is 40% to 50% HTML 0.0 HTML_MESSAGE BODY: HTML included in message 0.4 HTML_TAG_BALANCE_HTML BODY: HTML has unbalanced "html" tags 0.6 DATE_IN_PAST_06_12 Date: is 6 to 12 hours before Received: date Subject: Re: LF: QRSS Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.2 required=5.0 tests=HTML_40_50,HTML_MESSAGE, HTML_TAG_BALANCE_HTML,NO_REAL_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-PN-SPAMFiltered: yes X-Spam-Rating: 6 Content-transfer-encoding: 8bit In a message dated 3/19/04 9:01:45 AM GMT Daylight Time, blanch@pncl.co.uk writes:

Well, if the stability and frequency accuracy of 2m beacons is anything to go by he'll have a terrible job finding beacons with Speclab at 23cm never mind 240 GHz!!!!

Walter G3JKV.

With SSB or CW modes that would be very difficult.
On the other hand, if you just switch the 241GHz on and off at an audio rate or select a modulation type that does not depend on exact frequencies e.g.FM etc there are no drift problems visible on the screen.

73

David (QRSS / JT65 on 660nm)