X-GM-THRID: 1229927722970530525 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.115.73.3 with SMTP id a3cs1005041wal; Tue, 6 Mar 2007 16:50:00 -0800 (PST) Received: by 10.66.216.20 with SMTP id o20mr2888084ugg.1173228599352; Tue, 06 Mar 2007 16:49:59 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id k2si1046579ugf.2007.03.06.16.49.58; Tue, 06 Mar 2007 16:49:59 -0800 (PST) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1HOkHx-0003Ap-Qz for rs_out_1@blacksheep.org; Wed, 07 Mar 2007 00:45:53 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1HOkHx-0003Ag-Dw for rsgb_lf_group@blacksheep.org; Wed, 07 Mar 2007 00:45:53 +0000 Received: from sj-iport-4.cisco.com ([171.68.10.86]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1HOkHu-0004xq-6q for rsgb_lf_group@blacksheep.org; Wed, 07 Mar 2007 00:45:53 +0000 Received: from sj-dkim-6.cisco.com ([171.68.10.81]) by sj-iport-4.cisco.com with ESMTP; 06 Mar 2007 16:45:30 -0800 X-IronPort-AV: i="4.14,255,1170662400"; d="scan'208"; a="45893008:sNHT39180798" Received: from sj-core-3.cisco.com (sj-core-3.cisco.com [171.68.223.137]) by sj-dkim-6.cisco.com (8.12.11/8.12.11) with ESMTP id l270jSDd028812 for ; Tue, 6 Mar 2007 16:45:28 -0800 Received: from [10.21.121.166] (sjc-vpn6-422.cisco.com [10.21.121.166]) by sj-core-3.cisco.com (8.12.10/8.12.6) with ESMTP id l270jMa3000525 for ; Wed, 7 Mar 2007 00:45:28 GMT Message-ID: <45ED0624.8080001@g3ysx.org.uk> Date: Tue, 06 Mar 2007 06:11:48 +0000 From: Stewart Bryant User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <45EBFFB0.6000901@g3ysx.org.uk> In-Reply-To: Authentication-Results: sj-dkim-6; header.From=stewart@g3ysx.org.uk; dkim=neutral X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=disabled,DATE_IN_PAST_12_24=0.881 Subject: Re: LF: QAP 500...how to get rid of attenuator on rigs... Content-Type: text/plain; charset=us-ascii; format=flowed 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=0.4 required=5.0 tests=DATE_IN_PAST_12_24 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 Status: O X-Status: X-Keywords: X-UID: 2786 On the TS850 the RIT is a variable resistor not an encoder (It's VR6 on the SW_A board). It is normal for this arrangement to go to an ADC on the processor which then controls the synthesizer - adding or sutracting a nominal amount from the frequency set by the main dial. Therefore RIT will only be as good as the stability of the pot (mechanical and electrical) and the stability of the supply voltage. 73 Stewart G3YSX