Like To Winter In Southern Arizona SnowBird Net
Why Some Hamslike to Winter inSouthern ArizonaGeorge N0RCLToday after No BirdSnowBird Net
GVARC Hands On WorkshopsEd ToalN9MWCommittee ChairRon PhillipsTom LangAA7RPK7VOAVertical/Flag Pole AntennaVertical/Flag Pole AntennaBruce TewksburyRoger JohnsonJohn LynnK3BATK5IPKL7CYMagnetic Loop AntennaMagnetic Loop AntennaMagnetic Loop AntennaEd ToalN9MWDirection Finding (DF) AntennaGVARCWorkshops
Overview Hands On Workshop GoalsVertical/Flag Pole Presentation (Ron AA7RP) Magnetic Loop Presentation (Bruce K3BAT) Where We’re at and What’s NextDirection Finding (DF) Antenna Presentation (Ed N9MW) Where We’re at and What’s NextWhere We’re at and What’s NextFuture Hands On WorkshopsHow You Can Get InvolvedQuestions and Comments
Vertical/Flag Pole Antenna(Ron AA7RP)
Ron’s Flag Pole Installation
Ron’s Flag Pole Installation DiagramFlagpole 21 ft. high by 3in. OD at the baseA 4 foot wooden pole telescopesinto both flagpole and PVC base3 in. ID PVC PipeConcrete2 to 3 feetDeep
Tom’s Flag Pole Installation(Tom K7VOA)No tuner at the base,instead it’s fed through a 1:1balun
Tom’s Flag Pole Installation DiagramThe flagpole telescopes intoa length of PVC pipeFlagpole 21 ft. high by3 in. OD at the base3 ft.3 in. ID PVC PipeWire from balunattaches to flagpolethrough hole in PVCBolt through PVC Pipe2 to 3 feetDeepConcrete
Off Center Feed (OCF)Flag Pole Diagram21 ft. 10 inches (262 Inches)4 inches of Insulator exposed50”InsulatorPipe toSupportAntenna208 inchesOff CenterFeed Point
OCF Flag Pole Diagram (Cont)StainlessSteelHardwareDetail 1Bottomsection offlagpole is50 incheslong.Cut length of coaxDetail 2is 70 inches.Wirepigtailssolderedto coaxRingterminalsattachpigtail tohardwareCoax exitsthrough hole inDetail 1side of bottominsulatorAngle holewith drill tohelp coaxexitinsulatorCenterinsulator has4 inchesexposed outof 14 inchesBottominsulator has4 inchesexposed outof 24 inchesType 31 FerriteBeads covered withshrink wrap create aDetail 2Common ModeChoke
Magnetic Loop AntennaBruce (K3BAT)
Why a Magnetic Loop Antenna?1. Transition from Rural to Suburbiaa. Smaller Lot Size with HOA Restrictionsb. High RF Noise Levels2. Vertical Antenna Consa. Known for High RF Noise and Can Require Extensive Ground Radialsb. Can be Very Unsightly (HOA Targets)3. Magnetic Loop Antenna Pros and Cons(Pro) Small Footprint (3’-6’) and Low RF Noise (can null noise source)(Pro) Great Performance with proper construction/location(Pro) No Ground Radials Required(Con) Narrow Bandwidth: 20-10 Meters 35-80 Khz (40 and 80 Worse)(Con) Bad Rap from Poor Designs and Construction(Con) Many Loops Can Only Support QRP
Magnetic Loop Project Goals1. Usable at 100 Watt Level – 500 Watt Ultimate Goal2. Single Band for Simplified Tuning3. Remote Tuning Without Extra WiresMag Loop Design ChallengesThe Loop Itself Must Handle High CurrentCoupling LoopAnd Feed Line* 20-25 Amps RF at 100 Watts* 40-50 Amps RF at 500 WattsThe Tune Capacitor Must HandleHigh Current and Very High Voltage* 20-25 Amps RF at 100 Watts* 40-50 Amps RF at 500 WattsPLUS* 5000 Volts RF at 100 Watts* 14000 Volts RF at 500 Watts
Magnetic Loop ConstructionCoupling Loop and Line Feed7/8th Dia Helix Hard Line Supports High Current,Bigger is Better.Large Butter Fly Capacitor: 15,000 VoltBreakdownJohn LynnKL7CYRoger JohnsonK5IPWorking LoopFrame SupportJohn, Roger, and Bruce Stand Ready for a PhotoOp.Where’s Ed?
Magnetic Loop Motor Driveand Remote Control
20 Meter Performance Testing1. Great Signal Reports Both DX and Ground Effecta. Costa Rica, WA, and WI (SDRs show comparable Propagation to Vert w/Power)b. Southern AZ performance as good as Verticals w/Power2. A/B Test vs. Gap Titan DX (Loop at 100 Watts – Gap at 500 Watts)a. Xmit Reports 1 S Unit From Gap, Receive 1 S Below Gapb. Loop Noise Level 5 Units Gap (Much better copy)3. Loop has performed well from 30 Watts to 500 Watts4. Some Commercially Available Magnetic Loop Optionsa. MFJ-1786 (10-30M @ 150 Watts) 450b. MFJ-1788 (7-21M @ 150 Watts) 500c. Ciro Mazzoin MZZ-MIDI (3.5-7.9M @ 300W & 8-14.5M @ 800W)d. Ciro Mazzoin MZZ-MIDI (6.6-21.9M @ 450W & 22-30M @ 1000W) 2478 2098
Direction Finding (DF) Antenna (Ed N9MW)Ah .Here’s Ed N9MW, during hisearly years!
DF Antenna (Ed N9MW)DF Antenna Construction
DF Antenna (Ed N9MW)DF Antenna Capacitors
DF Antenna (Ed N9MW)DF Antenna Feed Line
DF Antenna (Ed N9MW)DF Antenna Interface with HDSDR
Club Resources and More (Ed N9MW) Customized GVARC site survey tools and expertise DF Antenna Coupling Loop and Leveraging HDSDRAim Chart Antenna AnalysisOther Thoughts From Ed
Future Workshops (Ed N9MW)What Next? Fox Hunt Late Fall? .Your Thoughts?They can run but they can’t hide!Who Let the Hams Out! Whoo Whoo Whoo?GVARC Hams! Are you ready for a Fox Hunt?
How You Can Get InvolvedComments/Questions/DiscussionEdN9MW (608) 279-5545 Committee Chair/Direction Finding AntennaRonAA7RP (520) 784-8595 Vertical/Flag Pole AntennaBruce K3BAT (520) 625-9170 Magnetic Loop Antenna
How You Can Get InvolvedThanks for Engaging
GVARC Hands On WorkshopsQ&A with Workshop TeamEd ToalN9MWCommittee ChairRon PhillipsTom LangAA7RPK7VOAVertical/Flag Pole AntennaVertical/Flag Pole AntennaBruce TewksburyRoger JohnsonJohn LynnK3BATK5IPKL7CYMagnetic Loop AntennaMagnetic Loop AntennaMagnetic Loop AntennaEd ToalN9MWDirection Finding (DF) AntennaGVARCWorkshops
2. A/B Test vs. Gap Titan DX (Loop at 100 Watts –Gap at 500 Watts) a. Xmit Reports 1 S Unit From Gap, Receive 1 S Below Gap b. Loop Noise Level 5 Units Gap (Much better copy) 3. Loop has performed well from 30 Watts to 500 Watts 4. Some Commercially Available Magnetic Loop Options a. MFJ
work/products (Beading, Candles, Carving, Food Products, Soap, Weaving, etc.) ⃝I understand that if my work contains Indigenous visual representation that it is a reflection of the Indigenous culture of my native region. ⃝To the best of my knowledge, my work/products fall within Craft Council standards and expectations with respect to
Aldridge, Kristen Alabama Troy Columbus State Alabama University of Alabama Alsobrook, Andrew Auburn Auburn University Alverson, Davis Auburn Samford . UAB Johns Hopkins University Austin, Riley Southern Union Southern Union Southern Union Austin, Ryan Southern Union Southern Union Southern Union Baeder, Julie LSU Clemson
1. Why is your church seeking affiliation with California Southern Baptist Convention and the San Diego Southern Baptist Association? 2. Included in this packet is a copy of Southern Baptists' doctrinal statement, "The Bap-tist Faith and Message" (see pages 7-16). This is not a creed, but it reflects common beliefs held by Southern Baptists.
Contiki Holidays Europe Winter 2012/13 Legendary for a reason HOLIDAYS FOR 18-35'S 2012/13 EUROPE WINTER Your travellers guide. EEurope Winter 1-84.indd 2urope Winter 1-84.indd 2 114/11/2012 12:154/11/2012 12:15. 3 Welcome to Contiki Here at Contiki, we're a bunch of passionate travellers like you, so we know all the top tips that you need .
Spring Volume 22 Number 3 Summer Volume 22 Number 3 Convention Volume 23 Number 1 1988 Winter Volume 23 Number 2 Spring Volume 23 Number 3 Summer . Spring Summer Fall 2015 Winter Spring Summer Fall 2016 Winter Spring Summer Fall 2017 Winter Spring Summer Fall 2018 Winter Spring Summer Fall . Author: Joan Thomas
WINTER All-Academic Team - March 19, 2013 FOR IMMEDIATE RELEASE NESCAC Winter All-Academic Team Released 871 Winter Student-Athletes Recognized for Academic Excellence HADLEY, Mass. – A total of 871 student-athletes have been named to the 2013 NESCAC Winter All-Academic Team by the conference office today.To be
1 Hot Summer/Cold Winter 1,694 4,735 4.21 4.66 2 Hot Summer/Mild Winter 1,694 3,528 2.78 3.14 3 Mild Summer/Cold Winter 1,163 4,735 3.26 3.59 4 Mild Summer/Mild Winter 1,163 3,528 2.14 2.49 5 Hot Summer/Base Winter 1,694 4,131 3.41 3.81
summer cold rain 0.05 winter hot sun 0.10 winter hot rain 0.05 winter cold sun 0.15 winter cold rain 0.20 P(sun) .3 .1 .1 .15 .65. Inference by Enumeration P(W)? S T W P summer hot sun 0.30 summer hot rain 0.05 summer cold sun 0.10 summer cold rain 0.05 winter hot sun 0.10
