Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 8970B38000094; Sat, 12 May 2012 15:49:39 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1STIHy-0003D5-NU for rs_out_1@blacksheep.org; Sat, 12 May 2012 20:47:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1STIHy-0003Cw-B6 for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 20:47:38 +0100 Received: from smtpout2.wanadoo.co.uk ([80.12.242.42] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1STIHw-0004pM-Gw for rsgb_lf_group@blacksheep.org; Sat, 12 May 2012 20:47:37 +0100 Received: from AGB ([2.26.16.216]) by mwinf5d23 with ME id 97nb1j0054fi64q037nbSE; Sat, 12 May 2012 21:47:36 +0200 Message-ID: <6C1B40CF71C3496DB872D913A0D62FF5@AGB> From: "Graham" To: References: <96F6DE3827714341B45E5194EA6D7946@AGB> <933D952DE28E4835A61D2B4B6F455CBF@computereebf79> <6888652D508A4E6C9D2781DE4CFC48B7@computereebf79> In-Reply-To: <6888652D508A4E6C9D2781DE4CFC48B7@computereebf79> Date: Sat, 12 May 2012 20:47:35 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 120512-0, 12/05/2012), Outbound message X-Antivirus-Status: Clean 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: R Martin Telegraph relay ? relay spring balance and adjusting tools ? [...] 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 [80.12.242.42 listed in list.dnswl.org] X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b 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=0.1 required=5.0 tests=MISSING_OUTLOOK_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-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:462691776:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40d74faebed31eb0 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none R Martin Telegraph relay ? relay spring balance and adjusting tools ? (I like the TTL gate hi) 73 -G. -------------------------------------------------- From: "Martin Evans" Sent: Saturday, May 12, 2012 8:36 PM To: Subject: Re: LF: IEEE488 > 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 ? > >