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Current mobile/fixed paths are as follows allowing for excellent Igate and Digi.<br><br>Path: APRS,WIDE*,WIDE6-6: sometimes here i try out CQ,ARISS* but with little success.<br><br><strong>Very best wishes/Tres meilleurs sentiments,</strong><br>
<strong>Rodge</strong><br>
<strong></strong> <br>
<strong>Rodge E. JONES G0CJM G6XCJ [g0cjm at live.com]</strong><br>
<strong>07928-252-090</strong> <b>[or] 07805-85-44-26*<br>*NOT available outside Britain.<br>Path outside Britain: CQ,ARISS* (Simplex 145.825Mhz)<br>radio location: www.aprs.fi/g0cjm-9 (sometimes -12)<br><br>Prof. R.E.JONES PJM(1962)HMAF(Vtn) Physics & Solar-flux.<br>Je parle francais et Chinois de Canton. I am a linguist in SIX languages. these include Cantonese and Malay.<br>Due to war firefight both legs are amputated and hearing lost (Borneo 1962).<br>Life-Member:RMPA. Member:CTS.,RGJRA.,G-QRP.,OCA43rd & 52nd.,BRARS.<br><br>Private & Confidential to addressee. DPA 1998 HRA 1998<br><br>R S V P !! <br></b><br><br><br><br>> From: aprssig-request@tapr.org<br>> Subject: aprssig Digest, Vol 69, Issue 9<br>> To: aprssig@tapr.org<br>> Date: Tue, 9 Mar 2010 12:00:02 +0000<br>> <br>> Send aprssig mailing list submissions to<br>> aprssig@tapr.org<br>> <br>> To subscribe or unsubscribe via the World Wide Web, visit<br>> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig<br>> or, via email, send a message with subject or body 'help' to<br>> aprssig-request@tapr.org<br>> <br>> You can reach the person managing the list at<br>> aprssig-owner@tapr.org<br>> <br>> When replying, please edit your Subject line so it is more specific<br>> than "Re: Contents of aprssig digest..."<br>> <br>> <br>> Today's Topics:<br>> <br>> 1. Re: Color Display (Shawn Stoddard)<br>> 2. Re: APRS Messenger PSK-63 On The Air Reports -- Magnetic Loop<br>> Antenna Now Up (Stephen H. Smith)<br>> 3. Re: APRS Messenger PSK-63 On The Air Reports -- Magnetic Loop<br>> Antenna Now Up (Lynn W. Deffenbaugh (Mr))<br>> 4. Re: APRS Messenger PSK-63 On The Air Reports -- Magnetic Loop<br>> Antenna Now Up (Stephen H. Smith)<br>> <br>> <br>> ----------------------------------------------------------------------<br>> <br>> Message: 1<br>> Date: Mon, 8 Mar 2010 08:28:57 -0500<br>> From: Shawn Stoddard <stoddard@pobox.com><br>> Subject: Re: [aprssig] Color Display<br>> To: TAPR APRS Mailing List <aprssig@tapr.org><br>> Message-ID: <20100308132907.894EB94955@b-sasl-quonix.pobox.com><br>> Content-Type: text/plain; charset="iso-8859-1"<br>> <br>> This is research for a new piece of software. I recall having seen something on aprs.org regarding how tro display the icon for station to show more than location. I'll keep digging.<br>> <br>> <br>> -----Original Message-----<br>> From: Curt, WE7U <curt.we7u@gmail.com><br>> Sent: Sunday, March 07, 2010 11:04 PM<br>> To: TAPR APRS Mailing List <aprssig@tapr.org><br>> Subject: Re: [aprssig] Color Display<br>> <br>> On Sun, 7 Mar 2010, Lynn W. Deffenbaugh (Mr) wrote:<br>> <br>> > Shawn Stoddard wrote:<br>> >> I recall seeing something about the color of a station indicating how <br>> >> recently it has been heard from. Anybody know where I might have seen this?<br>> ><br>> > It would help to know what APRS software you are referring to with this <br>> > question. The display of a station, particularly its color, is up to the <br>> > software and not part of the APRS protocol spec itself, although Bob <br>> > Bruninga's APRSdos had some color coding that it did, but I don't believe it <br>> > was based on age, but on capabilities.<br>> <br>> Xastir has a mode: "Display last report age", which displays minutes<br>> since the station was last heard. That text starts out green,<br>> changes to yellow after some number, then red some minutes after<br>> that. The intent was to help check up on SAR personnel more often<br>> via voice-checks if they weren't being heard from on APRS. If the<br>> age goes yellow, call then on voice. If it goes red, perhaps have<br>> another team check on them.<br>> <br>> -- <br>> Curt, WE7U. <http://www.eskimo.com/~archer><br>> APRS: Where it's at! <http://www.xastir.org><br>> Lotto: A tax on people who are bad at math. - unknown<br>> Windows: Microsoft's tax on computer illiterates. - WE7U.<br>> The world DOES revolve around me: I picked the coordinate system!"<br>> <br>> _______________________________________________<br>> aprssig mailing list<br>> aprssig@tapr.org<br>> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig<br>> <br>> <br>> <br>> <br>> <br>> ------------------------------<br>> <br>> Message: 2<br>> Date: Mon, 08 Mar 2010 14:41:51 -0800<br>> From: "Stephen H. Smith" <wa8lmf2@aol.com><br>> Subject: Re: [aprssig] APRS Messenger PSK-63 On The Air Reports --<br>> Magnetic Loop Antenna Now Up<br>> To: TAPR APRS Mailing List <aprssig@tapr.org><br>> Message-ID: <4B957D2F.3060106@aol.com><br>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>> <br>> [ 14:30 Pacific Time (02:27 UTC) Monday 8 Mar] <br>> <br>> I have successfully built, tuned and erected a homebrew magnetic loop <br>> antenna this afternoon. I now have this antenna connected to the <br>> TS-50 that is monitoring 10.149 APRS (Both AX.25 FSK and PSK63). <br>> This replaces the homebrew vertical dipole made from two 30M mobile <br>> HamSticks that I have been using up til now. The HF all-us map <br>> display on my web server at:<br>> <br>> <http://wa8lmf.dyndns.org:14439> <br>> <br>> is now using the new loop antenna. <br>> <br>> The first thing I noticed is that the natural background hiss and "band <br>> noise" heard with the new antenna dropped about 1 S-unit compared to the <br>> dipole. However, the TV sync hash from a leaking cable TV trunk, and <br>> AC hum and buzz that I was hearing on the dipole has completely <br>> disappeared. I appear to have a far higher signal-to-noise ratio than <br>> before. <br>> <br>> I expect that the small (1 meter diameter) resonant loop will have far <br>> better high-angle reception than the vertical dipole. I should be able <br>> to hear stations up and down the west coast (i.e. a relatively short <br>> haul of 400-1000 miles) much better. <br>> <br>> Eagerly awaiting the stations from the midwest and east coast that <br>> normally start showing up about 16:00 local time. <br>> <br>> Details on this dirt-cheap easy-to-build compact antenna for 30 meters <br>> (that could be stealthed in an attic) will follow in a week or so.<br>> <br>> ------------------------------------------------------------------------<br>> <br>> --<br>> <br>> Stephen H. Smith wa8lmf (at) aol.com<br>> EchoLink Node: WA8LMF or 14400 [Think bottom of the 2M band]<br>> Skype: WA8LMF<br>> Home Page: http://wa8lmf.net<br>> <br>> NEW! Universal HF/VHF/UHF Antenna Mounting System<br>> http://wa8lmf.net/mobile/UniversalAntMountSystem.htm<br>> <br>> "APRS 101" Explanation of APRS Path Selection & Digipeating<br>> http://wa8lmf.net/DigiPaths<br>> <br>> Updated "Rev H" APRS http://wa8lmf.net/aprs<br>> Symbols Set for UI-View,<br>> UIpoint and APRSplus:<br>> <br>> <br>> <br>> <br>> <br>> ------------------------------<br>> <br>> Message: 3<br>> Date: Mon, 08 Mar 2010 17:53:27 -0500<br>> From: "Lynn W. Deffenbaugh (Mr)" <ldeffenb@homeside.to><br>> Subject: Re: [aprssig] APRS Messenger PSK-63 On The Air Reports --<br>> Magnetic Loop Antenna Now Up<br>> To: TAPR APRS Mailing List <aprssig@tapr.org><br>> Message-ID: <4B957FE7.2020003@homeside.to><br>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>> <br>> Stephen H. Smith wrote:<br>> > Eagerly awaiting the stations from the midwest and east coast that <br>> > normally start showing up about 16:00 local time. <br>> > Details on this dirt-cheap easy-to-build compact antenna for 30 <br>> > meters (that could be stealthed in an attic) will follow in a week or so.<br>> <br>> And I'm eagerly awaiting the antenna details! I just posted a request <br>> for 30m antenna suggestions to another group and received some <br>> suggestions, but I'm looking to go cheap, dirt-cheap is even better! <br>> Any early hints or links so I can start to get a handle on what to <br>> expect? Even if it's a reference to a page number or article title at <br>> arrl.net or the 2010 Handbook, I'm all eyes!<br>> <br>> Lynn (D) - KJ4ERJ-1 - IGating 10.147.600 both AX.25 and PSK-63 from Palm <br>> Bay, FL USA (EL97qx)<br>> <br>> PS. See http://tinyurl.com/IGATE-KJ4ERJ-1 for recently heard stations<br>> <br>> <br>> <br>> <br>> <br>> ------------------------------<br>> <br>> Message: 4<br>> Date: Mon, 08 Mar 2010 16:01:10 -0800<br>> From: "Stephen H. Smith" <wa8lmf2@aol.com><br>> Subject: Re: [aprssig] APRS Messenger PSK-63 On The Air Reports --<br>> Magnetic Loop Antenna Now Up<br>> To: TAPR APRS Mailing List <aprssig@tapr.org><br>> Message-ID: <4B958FC6.3080506@aol.com><br>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>> <br>> Lynn W. Deffenbaugh (Mr) wrote:<br>> > Stephen H. Smith wrote:<br>> >> Eagerly awaiting the stations from the midwest and east coast that <br>> >> normally start showing up about 16:00 local time. Details on this <br>> >> dirt-cheap easy-to-build compact antenna for 30 meters (that could <br>> >> be stealthed in an attic) will follow in a week or so.<br>> ><br>> > And I'm eagerly awaiting the antenna details! I just posted a request <br>> > for 30m antenna suggestions to another group and received some <br>> > suggestions, but I'm looking to go cheap, dirt-cheap is even better! <br>> > Any early hints or links so I can start to get a handle on what to <br>> > expect? Even if it's a reference to a page number or article title at <br>> > arrl.net or the 2010 Handbook, I'm all eyes!<br>> ><br>> > Lynn (D) - KJ4ERJ-1 - IGating 10.147.600 both AX.25 and PSK-63 from <br>> > Palm Bay, FL USA (EL97qx)<br>> ><br>> > PS. See http://tinyurl.com/IGATE-KJ4ERJ-1 for recently heard stations<br>> ><br>> ><br>> ><br>> > _______________________________________________<br>> > aprssig mailing list<br>> > aprssig@tapr.org<br>> > https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig<br>> <br>> I'd do a web page on it now, but I'm getting ready for the IWCE <br>> (International Wireless Communications Expo) in Las Vegas this week. <br>> <br>> <br>> Basically, a "magnetic loop" antenna is a very small (relative to <br>> wavelength) single-turn loop tuned to resonance with a series <br>> capacitor. A second, much smaller loop connected directly to a coax <br>> feed line is placed inside the larger loop, nearly tangent to the first <br>> loop at the side opposite the capacitor. This small loop forms the <br>> primary winding of an air-core RF transformer with the larger loop <br>> forming the secondary winding<br>> <br>> <br>> Such a device can be nearly as efficient on transmit as a full-sized <br>> dipole -IF- the loop and capacitor are very efficient and low loss. <br>> The MFJ "Super-HI-Q Loop" antenna and the old AEA "IsoLoop" are <br>> commercial versions of such an antenna that are tunable between 10 to 30 <br>> MHz. With a 100 watt transmitter, HUNDREDS of RF amps circulate in the <br>> loop and 4,000-to-10,000 volts can appear across the capacitor. <br>> <br>> <br>> My loop is constructed of 3/8" soft copper "refrigeration tubing" from <br>> Home Depot. Ten feet of this are bent into a circular loop about 1 <br>> yard in diameter. The support is a vertical mast made from a piece <br>> of 1" Sched 40 PVC water pipe. with two 3/8" holes drilled through it's <br>> diameter about 37" apart. <br>> <br>> <br>> The trick was the capacitor. Normally, mag loop ants use motorized <br>> high-voltage butterfly, split-stator variable caps or variable vacuum <br>> caps to tune the loop to resonance while withstanding very high RF <br>> voltages. (I.e. the kind of variable caps you see in high power antenna <br>> tuners.) Since I didn't need the antenna to be tunable (it's going to <br>> set to a single spot frequency (10.149 MHz) permanently, I calculated <br>> the required capacitance and set out to create a cheap fixed-value cap <br>> with 4-5 KV breakdown.<br>> <br>> <br>> The inside diameter of the 3/8" tubing is an EXACT fit for the center <br>> conductor and dielectric of RG-8 or RG-213 coax. I stripped the outer <br>> jacket and braid off 37" of RG-213 cable and then stripped the <br>> dielectric off half an inch of the remaining insulated center <br>> conductor. I soldered the exposed half-inch of the cable to the INSIDE <br>> of one end of the loop tubing. (You'll need a old-fashioned 150 <br>> soldering iron or a Berz-O-Matic torch to heat up the copper tubing <br>> (not a wimpy electronics pencil or temp-controlled soldering station) <br>> since the copper is such a good conductor of heat! I then jammed the <br>> remaining 36 1/2" of dielectric-covered center conductor into the open <br>> other end of the copper tubing. Push it in until the loop is nearly <br>> closed with only a 1/4" so so gap between the two ends.<br>> <br>> <br>> This construction creates a coaxial capacitor with the coax cable center <br>> conductor being one plate and the INSIDE of the copper tubing being the <br>> other plate. The 36" or so of cable inside the tubing creates a <br>> capacitance of about 75pF required to resonate the loop. Normal 50-ohm <br>> coax has a capacitance of about 30-33 pF/foot. The snug fit between <br>> the center conductor/dielectric, and the inside diameter of the tubing, <br>> very closely duplicates the geometry, and thus capacitance of the <br>> original coax . (You could literally make your own copper hardline <br>> from this tubing by pushing yards and yards of center <br>> conductor/dielectric from RG/8, RG/213 or RG/214 into it.) <br>> <br>> <br>> You tune the loop to exact resonance by pulling the loop apart, or <br>> pushing the loop together exposing more or less of the coax cable. <br>> (Only the portion of the coax opposite the tubing's inside diameter <br>> contributes to the capacitor value.) In my model, I had to expose about <br>> 3/8" of the dielectric to get to 10.149 MHz. The tuning is VERY sharp <br>> (indicating hi Q and high efficiency). A change of 1/8th inch moves the <br>> resonance about 100Kz. The bandwidth for 2:1 SWR is only about 12 <br>> KHz. This is actually an advantage for single frequency operation - <br>> the antenna is so selective that transmitting on other HF bands <br>> simultaneously won't desensitize the 30M receiver at all. <br>> <br>> <br>> Finally, create the coupling loop. I cut 22" of normal #14 THHN copper <br>> house wire, formed it into a loop approximately 7-1/2" diameter and <br>> soldered the ends to the center conductor and braid of any convenient <br>> length of 50-ohm coax to reach to the radio. This loop is then placed <br>> so that it is about 1/4" away from the inside circumference of the large <br>> loop on the side opposite the open-ends/capacitor. I drilled a couple <br>> of additional holes in the PVC pipe to support the small loop in the <br>> proper orientation. By bending (distorting this circle) so that more or <br>> less of it is closely parallel to the big loop, you fine-tune the SWR at <br>> resonance. Mine has an SWR of under 1.5:1 at resonance. <br>> <br>> ------------------------------------------------------------------------<br>> <br>> <br>> <br>> <br>> ------------------------------<br>> <br>> _______________________________________________<br>> aprssig mailing list<br>> aprssig@tapr.org<br>> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig<br>> <br>> <br>> End of aprssig Digest, Vol 69, Issue 9<br>> **************************************<br> <br /><hr />Hotmail: Powerful Free email with security by Microsoft. <a href='https://signup.live.com/signup.aspx?id=60969' target='_new'>Get it now.</a></body>
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