Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 28F5A38000082; Tue, 22 Jan 2013 17:16:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Txm7a-0002d5-4Q for rs_out_1@blacksheep.org; Tue, 22 Jan 2013 22:15:10 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Txm7Z-0002cw-I8 for rsgb_lf_group@blacksheep.org; Tue, 22 Jan 2013 22:15:09 +0000 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 1Txm7W-00087J-RN for rsgb_lf_group@blacksheep.org; Tue, 22 Jan 2013 22:15:08 +0000 Received: from AGB ([2.26.46.129]) by mwinf5d41 with ME id rAEl1k00D2nDipe03AEl2y; Tue, 22 Jan 2013 23:14:46 +0100 Message-ID: <6A31D91F38D747529416F81CBBBDA6DD@AGB> From: "Graham" To: References: <8CFC5E9100D3878-19D0-1B385@webmail-d170.sysops.aol.com> In-Reply-To: Date: Tue, 22 Jan 2013 22:14:45 -0000 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-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: Joe, Looking at the app-sheet , there is a clock X 6 function , that would put the 10 MHz up to 60 MHz , giving 100 :1 clock / out put ratio ? this may be a PPL ? Racal tended to use xtals , in there 'harmonic' generators , feeding a low freq sq wave , to a 2 stage xtal filter , xtals ring in sync with the sq excitation , so phase locked as well .... 10 MHz square wave to ... what .. say couple of high freq [cheap] xtals = stable / clean HF clock ? [...] 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: 64a43ebf6189d3fbac7adf77f3718769 Subject: Re: xxSPAMxx Re: LF: AD9850 controlled by RS-232 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-sid: 3039ac1d40ce50ff0fbf7b3d X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Joe, Looking at the app-sheet , there is a clock X 6 function , that would put the 10 MHz up to 60 MHz , giving 100 :1 clock / out put ratio ? this may be a PPL ? Racal tended to use xtals , in there 'harmonic' generators , feeding a low freq sq wave , to a 2 stage xtal filter , xtals ring in sync with the sq excitation , so phase locked as well .... 10 MHz square wave to ... what .. say couple of high freq [cheap] xtals = stable / clean HF clock ? The holy grail would be some sort of 'pic' device that loaded the DDS on power on , with a pre-set frequency , then you have a real xtal replacement .. just needs to be fed its command word by something ? 73 -G.. http://www.analog.com/en/rfif-components/direct-digital-synthesis-dds/ad9851/products/product.html -------------------------------------------------- From: Sent: Tuesday, January 22, 2013 1:35 AM To: Subject: Re: xxSPAMxx Re: LF: AD9850 controlled by RS-232 > > > On Mon, 21 Jan 2013, jcraig@mun.ca wrote: > >> Hi Markus, >> >> but was toying with the idea of doing WSPR via the RS232 and AD09850... >> an excellent idea! >> > > On the other hand, having just looked at the DF6NM code for the dds and > WSPR and being most impressed by same, perhaps I should focus instead on > seeking stability and coherence. > > The plan is to multiply a 10 MHz OXCO by three and feed it to an AD9851. > Could this be done with the gates of a TTL 7400 to take the sine to > a nice rich square then to a 30 MHz tuned circuit to an output gate to the > dds? Perhaps this is a silly idea. Either way, comments both > negative and favourable will be appreciated. > > VX9MRC is still doing CW on 504.1 kHz. The carrier was generated by a > home brewed ad9850 with tiny connecting wires painstakingly soldered > to the pins. The boards Markus mentioned and Graham recommended a > while back are well worth their cost! > > 73 > Joe VO1NA > > > > This electronic communication is governed by the terms and conditions at > http://www.mun.ca/cc/policies/electronic_communications_disclaimer_2012.php >