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Mauro, Let us know if you found the sollution in your noisy case :-) 73s, Peter - PA1SDB ----- Original Message ----- From: "IK1WVQ Mauro" To: Sent: Friday, April 27, 2012 8:56 PM Subject: Re: LF: info about better digital mode in 2200m band [...] Content analysis details: (1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [213.75.39.4 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) X-Scan-Signature: 52d17ee6003fa6763aae891a69410baf Subject: Re: LF: info about better digital mode in 2200m band 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: 0:2:413305536:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d410b4f9bf4f91e5b X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none O.K. Mauro, Let us know if you found the sollution in your noisy case :-) 73s, Peter - PA1SDB ----- Original Message ----- From: "IK1WVQ Mauro" To: Sent: Friday, April 27, 2012 8:56 PM Subject: Re: LF: info about better digital mode in 2200m band > Hi Peter, > yes, I read your experiences .. > My antenna was already powered by battery .. > > I think my problem is noise captured by coax, or noise generated > locally and then impossible to distinguish from real signals .. > Tomorrow I want to try to isolate coax from RX via a toroid > transformer ... but I do not believe much ... > > thanks for your attention .. > > 73 de Mauro IK1WVQ > > At 10.07 27/04/12, you wrote: >>Hello Mauro, >>Did you take notice about my experiments regarding feeding the >>antenna with a battery ? >>Take a look at the pictures around the 25th of March in that log: >>http://www.qsl.net/pa1sdb/Experiences.htm >> >>I tried several power supply's, feeding it external with a power >>supply, via a L8712, very large C over the + and -, but nothing did >>help to get rid of the noise. >>Only when I use a battery to power the PA0RTD Mini Whip, the noise is gone. >> >>I'm writing here the expereince about signals below 24 KHz. I don't >>know what the effect is above 24 KHz. >> >>73's, Peter - PA1SDB >> >>http://www.qsl.net/pa1sdb >> >> >> >> >> >> >>----- Original Message ----- From: "IK1WVQ Mauro" >>To: >>Sent: Thursday, April 26, 2012 4:27 PM >>Subject: Re: LF: info about better digital mode in 2200m band >> >> >>>Hi to all, >>>thanks a lot for all the answers to my question ... >>>I want to precise my position: >>>I manage a 10.140MHz QRSS grabber from 2 years. >>>This winter I discovered the PA0RDT antenna, initially tried at >>>10.140 MHz (no great results) and then >>>at 500 KHz (few beacon received - DI2AM , OK0EMW , IQ2MI etc.) and >>>finally 137 KHz .. >>>Now i survey the segment 136.169-136.173 and 137.670-137.740 .. >>>the results are online in my website .. >>> >>>Now in the 136.170 segment i receive ONLY DK7FC , with good signals >>>but with deep QSB .. >>>Now in the 137.700 segment NO ONE received station ... >>> >>>I think my problem is the noisy urban environment, the 137.700 is >>>more noisy than 136.170 .. >>> >>>probably the PA0RDT makes intermodulation (a mistake was surely >>>made: in order to increase sensitivity I place a 60 cm "whip" wire >>>other than the PCB antenna), or my cable keeps noise (thanks Mike >>>for this info).. >>> >>>I planned to remote the antenna and RX in a rural site with a >>>microwave link to my qth, but for now this is impossible (mains >>>power problems) .. >>> >>>the last resort will be a magloop tuned and preamplified .... >>> >>>My request for infos about digital mode was simply to try to >>>receive other traffic before my patience runs out .. HI! >>> >>> From your emails, probably OPERA is the better choice, I shall try .. >>>(the RACALL 1792 is stabilized by a GPS .. no problem for frequency >>>stability) >>> >>>Thanks again for your attention .. >>> >>>73 da Mauro IK1WVQ >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>>At 17.35 26/04/12, Graham wrote: >>>>Mauro did ask ' the better digital mode ' as "reverse beacon" >>>>and listed 3 modes. >>>>I think this relates to internet linked s/n reporting systems >>>>, as wspr / lentus / Opera >>>>and other's that have web linking and not simple recognition ? >>>> >>>>Now if some one can slow a CW skimmer down slightly , there >>>>is a opportunity >>>>to read qrss as a reverse CW beacon mode and report s/n via the web ! >>>> >>>>G.. >>>> >>>>-------------------------------------------------- >>>>From: "IK1WVQ Mauro" >>>>Sent: Thursday, April 26, 2012 11:27 AM >>>>To: >>>>Subject: LF: info about better digital mode in 2200m band >>>> >>>>>Hi, >>>>> >>>>>what is the better digital mode for starting listening 137 KHz >>>>>band as "reverse beacon" (no TX)?? >>>>>("better" = greater number of active stations in Europe) >>>>> >>>>>WSPR ?? LENTUS ?? OPERA ?? >>>>> >>>>>what frequency is utilized for those modes ??? >>>>> >>>>>thanks in advance to all .. >>>>> >>>>>73 de Mauro IK1WVQ >>>>> >>>>>P.S.: my RX station is : PA0RDT 8 meters over the roof, RACALL >>>>>1792 .. not great station at all .. >>>>>in QRSS mode the only station what I can receive is the >>>>>"broadcast (HI!)" beacon of Stefan DK7FC .. NO OTHER ... >>>> >>>> >>>> >>>>Nessun virus nel messaggio in arrivo. >>>>Controllato da AVG - www.avg.com >>>>Versione: 9.0.930 / Database dei virus: 2410.1.1/4959 - Data di >>>>rilascio: 04/25/12 20:34:00 >>> >> >> >> >> >>Nessun virus nel messaggio in arrivo. >>Controllato da AVG - www.avg.com >>Versione: 9.0.930 / Database dei virus: 2410.1.1/4961 - Data di >>rilascio: 04/26/12 20:34:00 > >