Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl02.r1000.mx.aol.com (Internet Inbound) with ESMTP id DA73238000322; Sat, 12 May 2012 15:38:29 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1STI7M-0002jR-RF for rs_out_1@blacksheep.org; Sat, 12 May 2012 20:36:40 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1STI7M-0002jI-FT for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 20:36:40 +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 1STI7K-0004gV-T0 for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 20:36:39 +0100 Received: from computereebf79 ([95.145.0.213]) by mwinf5d33 with ME id 97cd1j0074bkNH3037cdlX; Sat, 12 May 2012 21:36:38 +0200 Message-ID: <6888652D508A4E6C9D2781DE4CFC48B7@computereebf79> From: "Martin Evans" To: References: <96F6DE3827714341B45E5194EA6D7946@AGB> <933D952DE28E4835A61D2B4B6F455CBF@computereebf79> Date: Sat, 12 May 2012 20:36:37 +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: I'll use transistor switching really, Graham - the relay is metaphorical... I can just about manage that...solid state 12AX7, no problem! Martin GW3UCJ. [...] 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: 0b2d339ae1d48966556dfb6ad64e2bce 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: 0:2:453699392:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d4ad04faebc350cb4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none I'll use transistor switching really, Graham - the relay is metaphorical... I can just about manage that...solid state 12AX7, no problem! Martin GW3UCJ. ~~~~~~~~~~~~~~~ > Well that's the problem, we all know what the kit can do , but > there are only a few who can tap the keys and make it perform .. > > I think your keying relay would be OK for OP8 .as long as the pull > in and release times are well matched to retain the envelope shape .. > > I think pulse 'jitter' would be a problem on the higher (shorter) > versions ...... could you not use blocking keying or a pin diode > switch ?