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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: Or, as long as you are going to use a PIC anyway, order a AD9850 DDS module from buyincoins.com. This 0-40MHz DDS costs less than $5 (including shipping). Add a cheap PIC, a $5 2x16 LCD and a rotary encoder (or use your PC to communicate with the PIC) and you can generate any frequency you want. And use the PIC to generate Opera, wspr, qrss. My next project. I already have all the components…. [...] Content analysis details: (1.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.215.172 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (minto.witteveen[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 2.1 AXB_XMAILER_MIMEOLE_OL_B054A AXB_XMAILER_MIMEOLE_OL_B054A 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 64a43ebf6189d3fbac7adf77f3718769 Subject: LF: Re: 475kHz crystal Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=response Content-Transfer-Encoding: 8bit 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-AUTHENTICATION: mtain-mj01.r1000.mx.aol.com ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1d7b9550ec6edf5bc6 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Or, as long as you are going to use a PIC anyway, order a AD9850 DDS module from buyincoins.com. This 0-40MHz DDS costs less than $5 (including shipping). Add a cheap PIC, a $5 2x16 LCD and a rotary encoder (or use your PC to communicate with the PIC) and you can generate any frequency you want. And use the PIC to generate Opera, wspr, qrss. My next project. I already have all the components…. Minto pa3bca. -------------------------------------------------------------------------- Ceterum censeo Carthaginem delendam esse -----Original Message----- From: Klaus Hirschelmann Sent: Tuesday, January 08, 2013 12:00 To: rsgb_lf_group@blacksheep.org Subject: Re: Fw: LF: 475kHz crystal Hi Pete and group >> maybe we can bring http://www.hanssummers.com/ for also offering >> 630m-Band versions of his QRSS and WSPR kits. > He doesn't seem to have taken MF on board as far as I can see. May one of > his rigs can be modified I have not checked my self. He does mention the use of Si570 programable xtal. I have one on a board with set frequencies from a PIC and selected by binary from a dil switch. They will not operate as low as 500kc/s so they have to be divided with either a CD4040 or CD4060 or any other logic divider. However it gives stable selectable xtal frequencies. In this case it is probably worth going the extra mile and make up a DSS as the master oscillator which will give VFO coverage. I think your pays your money and takes you choice as they say....... hee. What i intend to do, is building a relatively simple Stand-Alone WSPR beacon for 630m-Band. Using a Si570 with additional divider seemed to be quite an expensive solution. So i did order 7611.2 KHz crystal ( there is a company manucturing crystals according to given frequency ). By using a HCF4060B oscillator/divider this should give a stable signal around WSPR midden frequency 475.7 KHz. WSPR signal generation is planned according to http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Contoller.pdf where ( for use in Europe ) i intend to use DCF77 time signals instead of WWVB. Suitable PIC program version is made by PE1NWL and available via http://www.knology.net/~gmarcus/ , while DCF77 receiver module is obtainable from Conrad Electronics. Because of later signal division by 16, this conception will require a multiplication of crystal FSK deviation by same factor. For WSPR this should result in values around 23.43 Hz which ( i hope ) will not cause any problem. So far my plans in the moment, but of course it would be much easier, in case somebody would offer a kit already doing all i like. .. Klaus, DJ7OO