Why I Chose Buddipole - San Antonio Radio Club
Why I ChoseBuddipoleHarold C. Fleischer, IIIAE5AS3/25/20191
Basic Antenna Principle Basic Antenna Principle:There is no such thing as aPerfect Antenna. Corollary to Basic Antenna Principle:All Antennas are a compromise.3/25/2019Why I Chose Buddipole2
Antenna Frequency BandRequirements Use of Amateur Extra License with respect tofrequency bands Use of frequencies on radios owned or planned Kenwood TH-D7A HT – 70CM, 2M ICOM 751A – 10M, 12M, 15M, 17M, 20M, 30M, 40M,80M, 160M ICOM IC-W2A (2 each) HT – 70CM, 2M Yaesu FT-991A – 70CM, 2M, 6M, 10M, 12M, 15M, 17M,20M, 30M, 40M, 60M, 80M, 160M Yaesu FT2DR HT – 70CM, 2M (future ?) Kenwood TH-D74A – 70CM, 1.25M, 2M (future ?) Yaesu FTM-400XDR – 70CM, 2M3/25/2019Why I Chose Buddipole3
Standing Wave Ratio (SWR)SWR measures the impedance matching of a load tothe characteristic impedance of the transmissionline. In Amateur Radio, the impedance of the transmissionline is 50 ohms. Mismatches between the load and the transmissionline result in standing waves being reflected back andthe loss of transmission power. The objective is 1:1 and represents a perfect match. The point of an antenna tuner is to add impedance toget a match although some power is loss in theimpedance added to the transmission line.3/25/2019Why I Chose Buddipole4
SWR Objective The SWR objective was to get an antenna with thelowest possible SWR for each frequency band. Ideally, resonance across each frequency band waspreferred. Absent resonance across each frequency band, lowSWRs, defined a 3:1 across each frequency band wasto be sought. Own or will own 2 antenna tuners that can matchgreater 3:1, but all impedance added to obtain a matchwill take some transmission power. The implicit tradeoff is the power to match impedanceis less than the power absorbed by the standing wave.3/25/2019Why I Chose Buddipole5
Resonance Resonance exists when the impedance of the loadmatches the impedance of the transmission line. Natural 1:1 All power is radiated. Adding impedance to obtain a 1:1 match or lowSWR can be a part of antenna design: Matching units Traps Capacitance hats Added impedance uses power so less power isradiated3/25/2019Why I Chose Buddipole6
Original Antenna Plan3/25/2019Why I Chose Buddipole7
Problems with Original Plan Live in an HOA Can not totally hide antennas in backyard from street HOA not world renown for flexibility on antennas Not moving Radio Shack not possible on back of house Downstairs left is family room Downstairs right is breakfast nook/dining room Upstairs right is being used as a bedroom Radio Shack in the front of house a non-starter3/25/2019Why I Chose Buddipole8
Current Radio Shack PlanProbably some room for improvement.3/25/2019Why I Chose Buddipole9
Back Yard Layout65’50’60’Very BigOak TreePower LIne3/25/2019Why I Chose Buddipole10
Views of Back Yard3/25/2019Why I Chose Buddipole11
2X Safety Antenna and mast height a concern. The base of an antenna and mast combinationshould be twice the distance from a power linethen the total length of the antenna and mast thatcan fall over. Wind can blow an antenna and mast over and thencan blow an antenna and mast towards a powerline. Power line along the back fence is roughly 30’ offof the ground. Cable TV or telephone line on thesame poles is roughly 20’ off of the ground.3/25/2019Why I Chose Buddipole12
Constraints No Tower with Beam Antenna HOA Too Close to Power Lines No permanent antenna HOA Portable radio shack Radiation study 100W of power on HF and 50W power on VHF/UHF okay Tall tower really need to get separation between peopleand 1500W. Therefore, no linear amplifier so antenna needs tohandle 100W.3/25/2019Why I Chose Buddipole13
The Search Antenna(s) (system) to support ham bands from70CM to as low as possible, i. e., 80M or 160M. Antenna(s) (system) to support 100W of power. Must be portable and reasonable in terms of timeand effort to set up and take down by 1 person. Affordable.3/25/2019Why I Chose Buddipole14
Inverted VDipole Have Wire Dipoles Approximately 60’run to corners ofbackyard Would cover to 60M Would need multipledipoles Would radiatetowards power line Would haveradiation masked byhouse in oppositedirection3/25/2019 60’Why I Chose Buddipole15
Inverted VDipole (Cont’d) Back fence is 3’ Lets us see deer andcattle Does not keep deerout Wire in backyard likethis not a solution 60’3/25/2019Why I Chose Buddipole16
QST Ads, eHam Reviews,and Internet Search Looked at a number of verticals Those with matching unit really needed mastso Push poles a possibilityo Ruled out by 2X safety factor A number with vertical dipoleso Ground mounts in these caseso Radial wires neededo Ruled out because can not leave on ground untended foreven short periods OCF was another type of wire ruled out for that reason End wire feed was another type of wire ruled out Yagis or beams skipped for band coverage reasonsand not enough height to really use one3/25/2019Why I Chose Buddipole17
QST Ads, eHam Reviews,and Internet Search (Con’t) Search narrowed down to mast supported dipoles Several companies had mast supported dipoles 3/25/2019Alpha AntennaAlpha DeltaBuddipoleHi-Q-AntennaiPortableMFJSuper Antenna (actually a vertical)Transworld (monoband oriented)Why I Chose Buddipole18
BuddipoleInformation Written by BuddipoleSteve NE1RD User uses, as shown onthe cover, in the field Illustrates Buddipole’sorientation towards thelightweight, modularcomponents for backpackand portable use 15 each, but download ofPDF is FREE I read the PDF. So impressed, I bought thebook3/25/2019Why I Chose Buddipole19
Buddipole This is a center mast supported dipole. Has a 2M-40M frequency range in Basic version Can add 60M-80M coil to the Basic version Resonance solutions for 2M and 6M in Basic version Can add components to get resonance solutions for2M-20M and increase resistance portions of 30M & up A portion of the book addresses how to addcomponents to do a great part of this Buddipole is an Antenna System3/25/2019Why I Chose Buddipole20
Buddipole Fitsin Backyard Height even with 18’mast and tripod isbelow power line Some clearance ofhouse and fence oneach side Radiateperpendicular tohouse and powerline (WSW to ENE)3/25/201934’Why I Chose Buddipole21
Buddipole AntennaComponents (Basic)Item3/25/2019BuddipoleVersatee1Anodized Aluminum Arms - 22"2Coils2Coil Clip36" Tap Cable - red16" Tap Cable - black15.5 ft Telescopic Whips w Knurled Sleeves2Choke Balun w removable BNC/PL259 Adaptor125' coaxial cable1black thermoplastic carrying case1nylon backcloth carrying bag w stretch velcro strap1Why I Chose Buddipole22
Buddipole AntennaComponents (Basic vs. Deluxe)Item3/25/2019Buddipole DeluxeVersatee11Anodized Aluminum Arms - 22"22Coils22Coil Clip366" Tap Cable - red116" Tap Cable - black115.5 ft Telescopic Whips w Knurled Sleeves23Choke Balun w removable BNC/PL259 Adaptor1125' coaxial cable11Tripod01Portable Mast - extends to 9' 6" H01Rotating Arm Kit01black thermoplastic carrying case10nylon backcloth carrying bag w stretch velcro strap11Antenna System Bag01Why I Chose Buddipole23
Buddipole Antenna Components(Basic vs. Deluxe vs. Deluxe Long)Item3/25/2019Buddipole DeluxeDeluxe LongVersatee111Anodized Aluminum Arms - 22"222Coils222Coil Clip3666" Tap Cable - red1116" Tap Cable - black1115.5 ft Telescopic Whips w Knurled Sleeves233Choke Balun w removable BNC/PL259 Adaptor11125' coaxial cable11050' coaxial cable001Tripod011Portable Mast - extends to 9' 6" H010Portable Mast - extends to 19' H001Guying Kit001Rotating Arm Kit011black thermoplastic carrying case100nylon backcloth carrying bag w stretch velcro strap111Antenna System Bag010Antenna System Bag - 49" Long001Why I Chose Buddipole24
ItemBuddipoleAntennaComponentsAE5ASPlus someother thingsadded.3/25/2019BuddipoleDeluxeDeluxe LongAE5ASVersatee1111Anodized Aluminum Arms - 11"0002Anodized Aluminum Arms - 22"2224Anodized Aluminum Arms - 32"0006Coils2222Coil Clip36666" Tap Cable - red11126" Tap Cable - black11125.5 ft Telescopic Whips w Knurled Sleeves23369.5 ft Telescopic Whips w Knurled Sleeves0006Choke Balun w removable BNC/PL259 Adaptor1110Triple Ratio Switch Balun0001Extra BNC Pigtail (TRSB to Versatee)000125' coaxial cable110050' coaxial cable0011Tripod0111Portable Mast - extends to 9' 6" H0100Portable Mast - extends to 19' H0011Guying Kit0011Rotating Arm Kit0111Wire Assembly 33' w CWA0002Yagi Set0001IT adapter0001Knob from RAK0001black thermoplastic carrying case1000nylon backcloth carrying bag w stretch velcro str1111Antenna System Bag0100Antenna System Bag - 49" Long0011Winders (paracord and sanp hooks added)0004Why I Chose Buddipole25
Dipole Characteristics At ½ wavelength,almost omnidirectional At ½ wavelength,classicperpendicularpattern Approximately every½ wavelength abetter low anglepattern emerges3/25/2019Why I Chose Buddipole26
On What Frequencies canBuddipole get ½ WavelengthWith Buddipole’s 18’ Mast and 1’ of ground clearanceon the Tripod, reality is: ½ wavelength off ground is best that can be done for10M and 12M Multiple wavelengths off ground for below 10M:o 2 wavelengths for 6Mo 5 wavelengths for 2m For 15M and 17M wavelength off ground is 0.30wavelength off ground At 20M and above wavelength is ¼ wavelength off theground and less – Near Vertical Incidence Skywave NVIS is better at 40M – 160M3/25/2019Why I Chose Buddipole27
BuddipoleBook has“Cookbook” Scott NE1RDincludes exampleson how to buildantennas. It will usually showmodels built withstandard kitcomponents. It will showmodels built withextra components.3/25/2019Why I Chose Buddipole28
AE5AS’s“Cookbook” Build’s on ScottNE1RD concept Incorporates theBuddipolecomponents thatAE5AS has. It does retainbasic models incase spacerestricted.3/25/2019Why I Chose Buddipole29
Basic Tripod and Mast SetupStart3/25/2019Why I Chose Buddipole30
Basic Tripod and Mast SetupGuy Ropes3/25/2019Why I Chose Buddipole31
Basic Tripod and Mast SetupAt Full ExtensionThis will give instantaneous support when you put on antennacomponents and then run up the mast!3/25/2019Why I Chose Buddipole32
Versa Tee and TRSBTRSBTriple-RatioSwitch Balun3/25/2019Why I Chose Buddipole33
2M Dipole Ready3/25/2019Why I Chose Buddipole34
2M Dipole3/25/2019Why I Chose Buddipole35
6M DipoleSame 5.5 ft telescopic whips as 2M. They are just pulled out more.3/25/2019Why I Chose Buddipole36
10M DipoleChanged from 5.5 ft telescopic whips to 9.5 ft telescopic whips.3/25/2019Why I Chose Buddipole37
12M DipoleSame 9.5 ft telescopic whips as 10M. They are just pulled out more.3/25/2019Why I Chose Buddipole38
15M DipoleIncludes 22” arm on each side.3/25/2019Why I Chose Buddipole39
17M DipoleIncludes 2 each 22” arms on each side.3/25/2019Why I Chose Buddipole40
20M DipoleIncludes 2 each 32” arms and 1 each 22” arm on each side.3/25/2019Why I Chose Buddipole41
30M & 40M DipoleIncludes coil on each side. Different taps for 30M and 40M.3/25/2019Why I Chose Buddipole42
70CM Dipole3/25/2019Why I Chose Buddipole43
70CM Dipole?How can this be?3/25/2019Why I Chose Buddipole44
1.25M Dipole3/25/2019Why I Chose Buddipole45
Buddipole does VerticalDipoles The Versa Tee can handle a vertical element. The Versa Tee can handle two radials using aRotating Arm Kit (RAK). The RAK adds a RAK connector to each side. The red from TRSB connects to the verticalelement. The black connects to one RAKconnector. An additional tap wire is needed. It connects thetwo RAK connectors together. This gives a vertical with two radials.3/25/2019Why I Chose Buddipole46
Impact of the Number ofRadials On the left, there is only one radial. There is a dead side to the antenna. On the second from left, the second radial has eliminated the dead spot. On the third from left, four radials bring improvement. Scott NE1RDachieves this with wire. On the right, 16 radials bring even more improvement. The issue is what to choose. I chose two radials as it eliminates thedead spot and I can do most radials without any wire.3/25/2019Why I Chose Buddipole47
Connection Changesfor 2M Vertical3/25/2019Why I Chose Buddipole48
2M Vertical DipoleReady to be Raised3/25/2019Why I Chose Buddipole49
2M Vertical Dipole3/25/2019Why I Chose Buddipole50
6M Vertical Dipole3/25/2019Why I Chose Buddipole51
70CM Vertical Dipole3/25/2019Why I Chose Buddipole52
1.25M Vertical Dipole3/25/2019Why I Chose Buddipole53
2M Vertical AntennaWanting to be 20MFor 2X Safety reasons, no vertical dipole antennas over 6M in the backyard.This was a proof of concept that arms and whips could be used for 20Mradials on a 20M Vertical Dipole Antenna.3/25/2019Why I Chose Buddipole54
Buddipole will do YagiAntennas Buddipole has a Yagi kit. It will do 2 element Yagi Antennas. With a few more parts, it will do 3 element Yagi Antennas. Some Yagi calculators: Set boom length at ½ wavelengthSet the elements apart by ¼ wavelengthMake the Driven Element at ½ wavelengthMake the Reflector slightly longer than ½ wavelengthMake the Director slightly shorter than ½ wavelength Some Yagi calculators want all dimensions of everythingand then produce refined output. Buddipole Yagis are pretty much done with the simplecalculations (Remember, we are in the field doing the bestwe can.)3/25/2019Why I Chose Buddipole55
AE5AS’s “Cookbook for6M 3 Element Yagi Antenna There is a lot ofrounding in all YagiAntennas, but theBuddipole componentsget us close ondistances betweenelements. Cookbook includes 2and 3 element YagiAntennas for 2M, 6M,10M, and 12M. Beyond that, it is notexpected that balancecan be maintained.3/25/2019Why I Chose Buddipole56
2M 3 Element Yagi AntennaReady to be Raised3/25/2019Why I Chose Buddipole57
2m 3 Element Yagi AntennaRaised up3/25/2019Why I Chose Buddipole58
2m 3 Element Yagi AntennaVertical Polarization3/25/2019Why I Chose Buddipole59
2m 2 Element Yagi Antenna3/25/2019Why I Chose Buddipole60
6m 3 Element Yagi Antenna3/25/2019Why I Chose Buddipole61
6m 2 Element Yagi Antenna3/25/2019Why I Chose Buddipole62
10m 3 Element Yagi Antenna3/25/2019Why I Chose Buddipole63
10m 2 Element Yagi Antenna3/25/2019Why I Chose Buddipole64
12m 3 Element Yagi Antenna3/25/2019Why I Chose Buddipole65
12m 2 Element Yagi Antenna3/25/2019Why I Chose Buddipole66
Buddipole will do Near VerticalIncidence Skyway(NVIS) Antennas They provide a “manual” (1 page) on setting up thestandard Buddipole as a NVIS. NVIS is good for 400-500 miles. ARES uses NVIS to get out of a disaster area. The “manual” gives settings for 40, 60, and 80meters. AE5AS has not done this yet. AE5AS has procured guy ropes (paracord), snaphooks, and winders to replace the stakes. AE5AS has used a graphical technique todetermine guy rope length.3/25/2019Why I Chose Buddipole67
Extract from BuddipoleNVIS “Manual”3/25/2019Why I Chose Buddipole68
Miscellaneous on NVISGuy Ropes to handle the NVIS in order to keep the ends 2’ off theground without using stakes need only be 10’. The use of more arms, 22” and 32”, should change theparameters on NVIS. Large coils for low bands should change the parameterson NVIS. Could these changes extend NVIS to 160M? Unknown.3/25/2019Why I Chose Buddipole69
160M on Buddipole AE5AS asked the manufacturer. The manufacturer did not say Buddipole can do160M, but his words implied some people haveexperimented with it. Experimentation with large coils in place of normalones on 30-40 dipole configurations are in order tosee how low that can go. Experimentation with large coils, more arms, andwires in NVIS are in order to see how low that cango. No odds on whether either approach will work.3/25/2019Why I Chose Buddipole70
Advantages of Buddipole Buddipole is a system. Buddipole can do: Dipoles from 70CM to 40M with normal coils.Dipoles from 60M to 80M with large coils.Vertical dipoles from 70CM to 40M with normal coils.Vertical dipoles from 60M to 80M with large coils.Yagi antennas, 2 element and 3 element, from 2M to 12M.NVIS antennas from 40M to 80M. Incorporate 3rd Party parts. Be configured for true backpacking Hide behind the house and fly by night – HOA avoidance. Almost affordable.3/25/2019Why I Chose Buddipole71
Disadvantages of Buddipole Every change of frequency requires that the mastbe lowered and components changed by hand.Mitigated by having a “cookbook”. Every change of directions requires that the mastbe loosened and turned by hand. Not real cheap, but a good value for what you get.3/25/2019Why I Chose Buddipole72
Acknowledgement Richard Elder, WB5ACN, was my Elmer on this. His up front advice was his best:Get an antenna analyzer. He has helped on troubleshooting other problemsincluding this winter.3/25/2019Why I Chose Buddipole73
100W of power on HF and 50W power on VHF/UHF okay Tall tower really need to get separation between people and 1500W. Therefore, no linear amplifier so antenna needs to handle 100W. 3/25/2019 Why I Chose Buddipole 13
incompatibilities with the descriptions in this text. Please visit www.buddipole.com or the Yahoo! Buddipole User Group to obtain the latest data on Buddipole products, and updates to this book. Acknowledgements The danger of one of these lists is that someone is always omitted, much to the chagrin of the list creator. Well, here goes: Chris .
Homebrew Buddipole Variant By Paul – AE5JU History: The Buddipole is a portable dipole using telescoping whips on the ends of ce
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One spool of #20 Radio Shack insulated speaker wire. It comes in 75' spools, and that is more than enough to make several antennas. RS Part Number 278-138 One bag of the blue Radio Shack end connectors. Make sure you have at least six pairs of male/female connectors. Two “Featherweight” whips: Buddipole.com under “Accessories”.
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ner, Gladys Thomas, Charles McKinney, Mary Pelfrey, Christine Qualls, Dora Turner, David Petry, Cleone Gor don, Dorothy Scruggs, Phyllis Rice, Jacquelyn White, Rowena Napier, William Smith, Annie Smith, Ruth Ann Workman, Barbara Johnson and Letha Esque. The awards were presented by MU President Robert B. Hayes on March 4. Faculty meet Tuesday A general faculty meeting has been scheduled for .
