SCOPE - Palomararc

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November 2009SCOPEA newsletter by and for thePalomar Amateur Radio Clubof San Diego, California.colorSee SCOPE inon our website atwww.palomararc.org!Board of Directors NominationsPaul KB5MU sets up an HF vertical antennaat Burning Man 2009. See article on page 6.that position may be nominated at the Decemberregular meeting. The election shall be held at theDecember regular meeting, with the new officersand directors assuming their duties at the end ofthe December regular meeting.The floor will be open for nominations during theNovember General meeting to be held November4, 2009. Any suggestions should be directed tothe nominating committee assoon as possible.2010 Nominating CommitteeAt the meeting the committee Jim W6SST (760) 310-5271will bring forth a slate to be Jo KB6NMK (760) 741-2560considered by the membership Ron K2RP (760) 436-8109for election at the December 2,2009 meeting.Nominations can be made from thefloor at the November meeting.IfI there is only one nominee forana officer, that nominee maybeb declared elected withoutthet formality of a vote. If thereisi more than one nominee fora position, voting shall be bysecretswritten ballot.The list of positions on the boardof directors includes President, VicePresident, Secretary, Treasurer,and two Directors. The other threepositions on the board are chosenby the president from the fourcommittee chairs of the standingcommittees. These four positions areRepeater Technical Chair, RepeaterSite Chair, Membership Chair, andSCOPE Editor.The nominating committee and othersmaking nominations should ensurethat each nominee is willing to serveif elected. Should the only candidatefor a particular position die, becomeincapacitated or ineligible to serve,or withdraw his or her name fromconsideration, other candidates forSave the DateClub Meeting4 November 2009Club Officer NominationsProgram by Loren AD6ZJon Foursquare AntennasBoard Meeting11 November 2009Palomar Amateur RadioClub board meeting at7:00pm at W6GNI QTHSweepstakes!November 20097 - 8 ARRL NovemberSweepstakes (CW)21 - 22 ARRL NovemberSweepstakes (Phone)

Classified Ads are Free for Members!Below, Ron K2RP checks outthe wares at PARC’s annualauction. Photo by KB5MU.For SaleOne TS 520, excellent condition 195.00 with free MC 50 microphone.MFJ-949e 300 Watt Tuner. Like new (used twice).New 179.95.sale price 125.00.Two 75/40 Meter SWAN traps for 20.00. And one book free with each purchase,”Fundamentals of Radio” by Gordon Hathaway 6th printing 1953 and Radio Handbook,Sixteenth Edition by William Orr, W6SAI, 1962.Sonny Stires sstires@cox.net For SaleAstron RS35A 35 amp power supply 80Kenwood TM-221A 2M Transceiver 90Mirage 220 amp. 2 W in 20 W out (New from Mirage 170) 70Lunar 40W 2 meter amp 40Kenwood TS-621A Dual band (2M/220) transceiver, nice, with manual, mike power cord 275Yaesu FL2100B Linear 80-10 M 325All working and looking good!Ron K2RP (760) 436-8109 K2RP@ARRL.NETCORRECTION: It was erroneouslyreported in the caption of the above photoin the October 2009 issue of the SCOPEthat “Dennis Bacca, KD6TUJ receives acertificate of appreciation from Steve Venner,W6TAN for his generous help at the FARCauction in April.”The correct caption should read “DennisBacca, KD6TUJ receives a certificate ofappreciation from Steve Venner, W6TANfor his generous help at the EARS auction inApril.” Scope editorial staff apologize for theincorrect caption previously printed.SCOPE page 2

October Auction ReportJust a few of the treasures for sale at thePARC annual auction.Photos by KB5MU.The annual club auction was held at the October meeting,and was very successful. Art, KC6UQH, served asauctioneer and entertainer for the evening, describing eachitem and taking bids from eager bidders. Helpers movingthe merchandise around included Conrad, KG6JEI; Terry,K3PXX; and Tom, KG6RCW. Georgia, KI6LAV; Bob,KG6RGI; and Dennis, KD6TUJ handled the computerizedpaperwork, enabling each buyer to “check out” quickly atthe end of the auction.SCOPE page 3

Club ReportsMembership ReportFold and StapleKB6NMK JoW6GNI Al & KathyWA5ACE SonnyKB6YHZ ArtNew Members Joining PARC:KG6YFS, KI6ZUM, AF6SH, KJ6CKB,N6WST and Richard Johnston (nocall yet). Also, six members reinstated their expired memberships.And two members renewed for 5 yearsrs ( 100 each)each). That’s thegood news. The not so good news: I had to tell the Board thatour membership is now down to 300 members.I’m pleased that several members listed as “expired” in the October SCOPE, that receive their SCOPE by the web have renewed - great. Now the list is somewhat shorter. The followinghave not renewed, and hopefully they will see their calls here,and get a check in the mail! KI6SAT, KD6FKN, KG6UTS, andN6KTC. Pretty Please!The club does need your support.AlW6GNIRepeater Down?Hanging?Let us know!Send an email to:board@palomararc.orgwith your observation,the date, and time (approximation OK). Manyears make light work.Upcoming General Meeting TopicsNovember - Loren Hunt AD6ZJ will discuss the4-Square antenna systemsDecember – Elections and Christmas socialJanuary 2010 Monica ZechMonth TBD - Lin Robertson KJ6EF – Vintagebroadcast radiosMonth TBD - KC6YSO – AM and other boat anchorsMonth TBD - AK6QJ – Subject TBDMonth TBD – ED Zeranski KG6UTS – Military radiosBoard Members Attending SeptemberMeetingPresident Dennis Baca KD6TUJSecretary Loren Hunt AD6ZJDirector #2 Conrad Lara KG6JEIMembership Al Donlevy W6GNIDirector #1 Paul Williamson KB5MUScope Editor Michelle Thompson W5NYVTreasurer Georgia Smith KI6LAVRepeater Chair Mike Pennington K6MRPSCOPE page 4

September Board of Directors Meeting MinutesDiscussion items:Need to post a message in the Scope remindingmembers to call a club control operator if thereis a repeater malfunction.Power interruptions will likely be happeningTreasurer’s Reportmore often due to fire prevention activities. ThisGeorgia, KI6LAV presented the Augustjust emphasis the need to have the repeaterTreasurers’ report. Total assets are 12,301.26available for backup power.and prepaid dues are 5916.00. The clubs selfinsurance has been moved to a CD. The separate New Hams – We have a donation to help newhams with training and events. The donation isCD is an effort to clarify the accounting for theanonymous.self insurance equipment fund. A motion wasThe High School radio program is disbanding. Amade to accept the treasurers’ report by Lorenrecommendation was made to send the fundsAD6ZJ and seconded by Mike K6MRP Mike.to Handi Hams. The PARC board doesn’t haveMotion Carried.direct jurisdiction on these funds but agrees inprinciple that the Handi-Hams group would be aSecretary’s Reportgood group worthy of supporting.Minutes approved.Amateur Radio Appreciation Day 2009 – At HROOctober 10th – Should PARC participate – Yes butGeneral Meeting: October meeting –how? We will check our calendars.Annual AuctionSeptember 12th ARRL and the Salvation ArmyAuction setup begins at 5:30, Sellers at 6:00,are having a summit to discuss a coordinatedBuyers at 6:30. Meeting starts at 7:00 at 5815 Elemergency disaster preparedness plan. ThisCamino Real. Location details to be reconfirmed.information was given with late notice and PARCArt KC6UQH our faithful auctioneer. Runners andwillw likely not have anystaging needed.offio cer participation due2009 PARC Auction Statisticstot prior commitments.Membership Report:184 itemsElectionECommitteePresented by Al W6GNI22 sellers– Dennis KD6TUJCurrent club membership 55 bidders 1,876 gross salesisi in the process ofis 305. 355.45 club profitpullingtogether ap27 donations to the clubnominatingncommittee.Repeater Site/ 150 highest priced item (Yaesu VX5R)ThecommitteewillTTechnical Report:“Smartest” participants brought address labelsor stampsbeb announced at theMike, K6MRP gave theending time for operations 10:40pmOctobermeeting.Orepeater site report. Wehad a lock-on on theOLDBusiness:O130 machine that lastedPARC Camper Trailer – The old trailer hasmultiple hours. Once the error was identified Artbeen transferred to the tow yard is ready forKC6UQH did a full reset and restores the system.termination. Look for something in the Scope.The Palomar Fire department has a new Unipole75th anniversary logo contest. Should we do one?mast and would like us to pickup the tower PARCWill discuss furtherpreviously donated. Several power suppliesGenerator – Is now operating and Dennis isand battery charger units are in need of repair.looking into propane conversion kit and will seeLoren AD6ZJ will look into repairing these. Theabout getting a used tank from a local supplier.site looks clean except for a fallen tree next toseveral trees marked for removal from SDG&E.The meeting was called to order at 7:03 PM byPresident Dennis Baca KD6TUJ. The meeting washeld at the home of Al Donlevy W6GNI.SCOPE page 5

Ham Radio at Burning Manby Paul KB5MUBurning Man is an annual . something. Aboutfifty thousand people come together on a usuallydry lakebed in the Black Rock Desert in Nevadato assemble a temporary city, an intentionalcommunity, a shared participatory art show, agiant camp-out and,yes, party. That’s not agood description, butno good descriptionis really possible injust a few words. Thevalues of this specialcommunityincludeself-reliance, mutualservice, and activeparticipation.We were well equipped for the 2m simplex net,with a Diamond VHF/UHF antenna (a half-wavedesign that doesn’t require a good groundplane)mounted temporarily to the ladder on ourborrowed RV. A Kenwood TM-D710A provided forAPRS tracking during the trip up and back, andplenty of power to cover the entire Black RockCity area. Most net check-ins were probably usinghandheld radios, and were still mostly able to hearone another. An ordinarymobile station installationlike ours in the RV wasmore than sufficient.As you might expect,there is a ham radiocontingent at BurningMan. Each day duringthe 9-day-long eventthere’s a net heldat noon on 2m simplex (146.52 MHz FM). Byhappenstance, I ended up acting as Net Controlfor that net on the first day we were there, andabout 20 amateurs checked in. We exchangedinformation about local repeaters newly installedin nearby Gerlach, Nevada, and a temporaryrepeater on the air from inside Black Rock Cityitself. The really big news was that one of thehams was offering a treat of ice cream madewith liquid nitrogen to all net members! Free, ofcourse, since commerce is not allowed at BurningMan.A panoramic view of Black Rock City, Nevada as seen from the top of theRV at 4:45 and Kindred. This area could be described as the “suburbs”of the city, as it was much quieter and less decorative than the city center.Photo by KB5MU.SCOPE page 6We also came equippedfor HF operation, but thatdidn’t work out quite sowell. We had an IcomIC-756 Pro II transceiverBelow is the back of the RV during the event. Theoperating station was crammed in between boxesand gear. Photo by KB5MU.

with all the trimmings, and enough poweravailable to run it off the RV’s systems, whichincluded dedicated batteries (separate from theignition battery!), a gasoline generator, and solarpanels (one installed and twomore deployable). We installeda Cushcraft R5 vertical antenna,which covers the 10, 12, 15, 17,and 20 meter bands and alsodoes not require a groundplane.A heavy patio umbrella baseprovided the footing for threeof the military fiberglass supportpoles that have been readilyavailable on the surplus marketlately. The base of the antennawas guyed with three lightweightcords anchored with stakes madeof rebar. This simple installationsurvived the windy conditions onthe playa, with extended periodsgusting up to 40 mph, with noproblem.peaks of S9 20dB every 10 kHz or so, on top ofa continuous background level of about S5. Noactual signals were visible above the noise. Thiswas rather discouraging.There aren’t anyTmore sunspots atmBlack Rock CityBtthan anywhereelse, so our bestehope was forh20-meterttheband,thelowestbfrequencycoveredby the R5. splaypfeature,whichisidealforgettingfa quick look at the activity on aband. So, we took a look at theb20m band. Gaa! The band was2wall-to-wall with noise. There werewThe other big limitingfactor on our ham radiooperation at the eventwas time. As it turns out,there’s so much to see anddo that it doesn’t seemright to spend a lot of timetuning mostly-dead bandsback at camp. We would turn the radio on severaltimes a day and check the bands, but the noiselevel remained high and the audible activity levelremained near zero, so we wrapped up the tripwith no QSOs in the HF logbook.In retrospect, the highnoise level should nothave been surprising. Thearea was packed withpeople using generators,which tend to be noisy,not to mention all sorts ofdisplays with high-voltageneon lights, odd vehicleswith all kinds of motors,and who knows what else.Probably the comb ofnoise peaks was comingfrom one specific nearbysource, and the continuousbackground noise wasthe sum of all the othersources in the area.Above, the 40m Four-Square antenna at the 3905 Century Club annual meeting.Below is the 80m in-phase antenna. Photos provided by Loren AD6ZJ.SCOPE page 7

October Auction Report and PhotographsThis year a number of recent-vintage transceivers sold in the 150 range -- most years, equipment that expensive doesn’tsell very well. A couple of rigs in the 500 category wereoffered, but (as usual) didn’t sell. Boxes of random parts werefairly popular, as were distinctive older radios (in all conditions). Someone was clever enough to split up a large supplyof ground braid into a dozen or so 25-foot hanks, which weredistributed throughout the auction tables to be sold at different times. Each hank sold for the minimum bid of 6 -- ormore!SCOPE page 8continued

Repeater Site ReportDue to the unreliable switching of the two invertersfrom "standby to on" which supplies power to therepeaters, the technical committee has decidedto change over to 48 vdc to 12 vdc converters foreach repeater. Thiswill be more powerefficient and if onefails we will onlylose one repeaterand not the wholelot as with theinverters. To runthe converters wewill need to wireeachrepeaterbuilding with a 48vdcdistributionpanel. We will needto move conduitfrom the old tinbatterybuildingto the now blockbuilding 48 vdcbattery system.On 9/30/09 Tom,KG6RCW and Mike, K6MRP went to the site torerun the conduit and wire from the old batterybuilding to the new batteries in the block building.(see pics) In the process of digging the trencheswe ran into a big chunk of concrete about 6 inchesthick which was eventually broken up with a sledgehammer to finish the trench. We definitely got ourexercise that day. The conduit was then rerun andconnected to the Hut which is attached to theblock building. The trenches were then back filledand leveled. Thetwo batteries (13.6vdc) that powerthe control receiverwere then movedfrom the old batterybuilding to the hut.A small chargerwas added andthe batteries werewired to the controlreceiver which wastested for properoperation.visit. The weather was drizzly, windy and cold. Wewere able to run the new wire and terminate iton the fuse panel in the block building. The otherend will be terminated on a distribution fuse panelwhich I am in the process of building. (see pics)More to come.Work partiesaat this timeaarenotascheduledeeventandaare done onaan as neededbbases. Anyoned e s i r i n gttoattendwwork partiesppleasesendmme an emailaatk6mrp@aamsat.org andI will notifyyyou as soonaas I knowoone is beingsscheduled. Iwwould like toapologizetothe person who sent me an email volunteering forwork party help. I lost your info. Please contactme again. Thanks.On10/4/09 wewent back to thesite to run the wirein the conduit thathad been reroutedon the previousSCOPE page 9Mike, k6mrpRepeater Site Techk6mrp@amsat.org760 749 8888

I Wonder What That Antenna Pattern Would Look Like.by Michelle W5NYVUsing the free software program cocoaNEC 2.0, I experimented with what would happen to a verticalantenna model if the ground radials were not perpendicular to the vertical element. This might happenif the vertical antenna was installed with the radials on a slope, or if the main vertical element waspushed over by accident or the wind. In the figure below, two antenna models are compared. On theleft-hand side of the figure is an azimuth diagram (viewing the antenna patterns from above), and onthe right-hand side is an elevation diagram (viewing the antenna patterns from the side). The dashed(black) line is a vertical antenna with main element and radials perpendicular to each other. The solid(red) line is a vertical antenna that has been bent over at a 15 degree angle with respect to its radials.Losing a perpendicular angle causes the vertical antenna to lose gain, changes feedpoint impedencefrom 27.7 i 0.7Ω to 48.2 - i 7.1Ω, and distorts the pattern in the direction of the tilt. In this case, thevertical is tilting 15 degrees to the right in the elevation diagram.0.76 dBi6.61 dB1.03 dBiVertical Antenna With Perpendicular RadialsFrequency 8.250 MHzVSWR(Zo 50): 1.8:1Average Ground - Rel. dielectric constant 10.000,conductivity: 0.04000 mhos/meter. (NEC-2 ground)Directivity: 6.18 dBMax gain: 1.03 dBi (azimuth 180 deg., elevation 26 deg.)Front-to-back ratio: 0.00 dBFront-to-rear ratio: 0.00 dBVertical Antenna With 15 Tilt With Respect to RadialsFrequency 8.250 MHzVSWR(Zo 50): 1.2:1Average Ground - Rel. dielectric constant 10.000,conductivity: 0.04000 mhos/meter. (NEC-2 ground)Directivity: 6.61 dBMax gain: -1.01 dBi (azimuth 180 deg., elevation 27 deg.)Front-to-back ratio: 1.45 dBFront-to-rear ratio: 0.66 dBSCOPE page 106.61 dBNon-Ham Radio: WD9XSPDick Kalkofen K6KAL correctly identified the station pictured on thecover of last month’s Scope.The station, WD9XSP, is an experimental GSM cellular base station.The OpenBTS project built a temporary cellular system to support TXTmessaging at Burning Man, in the800 MHz commercial cellular band.Their RF hardware was based on theUSRP (Universal Software Radio Peripheral) open-source SDR platformfrom Matt Ettus, N2MJI. More information is available athttp://openbts.sourceforge.net/

Repeater Site PhotosOctober Auction PhotosSCOPE page 11

SCOPEP.O. Box 73Vista, CA 92085-0073PERIODICALSPOSTAGE PAIDAT VISTA CA92085-9998Return service requestedScope (USPS #076530) is published monthly by the Palomar Amateur Radio Club 1651 Mesa Verde Drive,Vista, CA 92084. POSTMASTER: Send address changes to SCOPE, P.O. Box 73, Vista, CA 92085. Periodicals postage paid at Vista, CA 92084. Dues are 20 per year or 35 per year for a family. Dues include asubscription to Scope.Editor: Michelle Thompson W5NYVSubmissions: scope@palomararc.orgQuestions? Ideas? Comments? W6NWG@amsat.orgFeatured Program:Loren AD6ZJ will be the featured speaker at our general club meeting at 7:00pm on 4 November 2009 at theCarlsbad Safety Center, 2560 Orion Way, Carlsbad, CA, USA. Loren will be speaking about Four-SquareAntennas.SCOPE page 12

Kenwood TM-221A 2M Transceiver 90 Mirage 220 amp. 2 W in 20 W out (New from Mirage 170) 70 Lunar 40W 2 meter amp 40 Kenwood TS-621A Dual band (2M/220) transceiver, nice, with manual, mike power cord 275 Yaesu FL2100B Linear 80-10 M 325 All working and looking good! Ron K2RP (760)

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