Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0A06F38000145; Sat, 12 May 2012 14:29:17 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1STH2D-0001wr-6m for rs_out_1@blacksheep.org; Sat, 12 May 2012 19:27:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1STH2C-0001wi-R2 for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 19:27:16 +0100 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1STH2B-0004ML-Ax for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 19:27:15 +0100 Received: from computereebf79 ([95.145.0.213]) by mwinf5d33 with ME id 96TD1j0064bkNH3036TDCy; Sat, 12 May 2012 20:27:14 +0200 Message-ID: From: "Martin Evans" To: References: <99F3BE8C10254B3AAC3A81BA16DA2584@computereebf79> <3333EC45C262400BA932E210F3241223@JimPC> Date: Sat, 12 May 2012 19:27:13 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Spam-Score: 0.0 (/) 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: Thanks Jim - yes, this is what I'll do. I just thought that keying the sig gen sounded a bit more elegant. And I need only on-off keying, for CW and maybe OPERA, so relay keying it will be. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.59 listed in list.dnswl.org] X-Scan-Signature: e90dcb17768c7e768f13e0721cc1c0c7 Subject: Re: LF: IEEE488 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=FORGED_MUA_OUTLOOK 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-SCORE: 0:2:436121792:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d410d4faeabfd292b X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Thanks Jim - yes, this is what I'll do. I just thought that keying the sig gen sounded a bit more elegant. And I need only on-off keying, for CW and maybe OPERA, so relay keying it will be. Martin GW3UCJ. ~~~~~~~~~~~~~~~~~~~~~~ > Provided you were happy with simple on/off keying, i.e. QRSS rather than > DFCW or the various mFSK modes, there is no need to interface the sig gen > to the PC. You could just connect the sig gen output via a relay or other > bit of gating circuitry, set the generator to the frequency you want and > key the relay with the QRSS software... Actually, for most types of TX, a > better idea is to leave the generator going constantly and key the PA > stage. I used to use an old Racal generator in this way. > > Cheers, Jim Moritz > 73 de M0BMU >