Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7E84D38000098; Mon, 19 Mar 2012 14:33:40 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S9guW-0001hc-44 for rs_out_1@blacksheep.org; Mon, 19 Mar 2012 18:02:24 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S9guV-0001hT-An for rsgb_lf_group@blacksheep.org; Mon, 19 Mar 2012 18:02:23 +0000 Received: from filter02.i-online.fr ([195.200.78.9]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1S9guT-0002lK-Rb for rsgb_lf_group@blacksheep.org; Mon, 19 Mar 2012 18:02:23 +0000 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by filter02.i-online.fr (IceWarp 10.2.2) with ESMTP (SSL) id DVV16001 for ; Mon, 19 Mar 2012 19:02:01 +0100 Received: (qmail 31535 invoked by uid 507); 19 Mar 2012 19:02:08 +0100 Received: from unknown (HELO ?192.168.1.101?) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 19 Mar 2012 19:02:08 +0100 From: John Rabson Date: Mon, 19 Mar 2012 19:02:12 +0100 Message-Id: To: rsgb_lf_group@blacksheep.org Mime-Version: 1.0 (Apple Message framework v1257) X-Mailer: Apple Mail (2.1257) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: LF: Si570 oscillator X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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: 0:2:475130016:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1db4074f677c032199 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none LF, I have been wondering about putting the device in a = temperature-controlled enclosure and wonder if there's anything to be = gained. What is the frequency-determining element? If it is a quartz = crystal or similar, what is the temperature at which the frequency = dependence is a minimum? Does this temperature fall within the permitted range of operation for = this device? Alternatively, could one realistically impose GPS discipline on a unit = using this device (such as a QRP2000)? John F5VLF=