Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the...
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Transcript of Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the...
![Page 1: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/1.jpg)
Antennas
Frank Donovan, W3LPL
![Page 2: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/2.jpg)
Antenna Secrets of the Top Multi-Op Stations
Revealed !How do the top multi-op stations break those huge pileups so fast?
How do they consistently make 5000 to 8000 QSOs in one weekend ?
Of course, they have great operators, full legal power, great locations, and they’re really serious competitors...
But that’s not enough ! Its not even close...
They all use stacked monoband Yagis at carefully chosen heights
But the most competitive multi-ops do much more…
The antenna secrets of the Top Multi-ops...And tips to apply to your own station!
![Page 3: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/3.jpg)
Secret #1: Use All of the Right Angles
Do your antennas cover all of these elevation angles?The top multi-ops cover them all (or almost all…)
Europe Asia/Pacific80M 10 - 30 deg (100 - 200 ft) 7 - 18 deg (150 - 200 ft) 40M 7 - 23 deg (100 - 200 ft) 5 - 15 deg (120 - 200 ft) 20M 5 - 18 deg (75 -100 ft) 4 - 12 deg (100 - 200 ft) 15M 4 - 15 deg (60 - 90 ft) 3 - 10 deg (90 - 200 ft)10M 3 - 12 deg (50 - 80 ft) 2 - 8 deg (80 - 200 ft)
![Page 4: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/4.jpg)
Secret #1: Use All of the Right Angles
Of course, its extremely difficult to cover all of the right angles
So…
Tip #1: Design your antennas for as many of the right angles as you can. A good compromise is:
50 - 100 feet for Europe 80 - 100 feet (plus) for Asia/Pacific
![Page 5: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/5.jpg)
Secret #2: Eliminate Radiation Pattern Nulls
Low antennas have clean radiation patterns- with no nulls- but poor low angle radiation
![Page 6: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/6.jpg)
02468101214161820
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5 Element 20 Meter Yagion 48 Foot Boom, 50 Feet High
decibels
degr
ees
50 FT
5 degrees
Europe
Poor low angleradiation
18 degrees
No nulls...
![Page 7: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/7.jpg)
02468101214161820
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5 Element 20 Meter Yagion 48 Foot Boom, 50 Feet High
decibels
degr
ees
50 FT
4 degrees
Asia/Pacific
Poor low angleradiation
12 degrees
No nulls...
![Page 8: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/8.jpg)
Secret #2: Eliminate Radiation Pattern Nulls
High antennas produce excellent low angle radiationbut have deep nulls at very important elevation angles
![Page 9: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/9.jpg)
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5 Element 20 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep nullEurope
12 degrees
4 degrees
Excellent low angleradiation
![Page 10: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/10.jpg)
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5 Element 20 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep null
Asia/Pacific
12 degrees
4 degrees
Excellent low angleradiation
![Page 11: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/11.jpg)
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6 Element 15 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep null
Deep null
Europe
15 degrees
4 degrees
Excellent low angleradiation
![Page 12: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/12.jpg)
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6 Element 15 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep null Asia/Pacific
10 degrees
3 degrees
Excellent low angleradiation
![Page 13: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/13.jpg)
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7 Element 10 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep null
Deep null
Europe
12 degrees
3 degrees
Excellent low angleradiation
![Page 14: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/14.jpg)
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7 Element 10 Meter Yagion a 48 Foot Boom, 200 Feet High
decibels
degr
ees
Deep null Asia/Pacific
8 degrees
2 degrees
Excellent low angleradiation
![Page 15: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/15.jpg)
Secret #2: Eliminate Radiation Pattern Nulls
Well designed stacked Yagis provide the best of both!- low angle radiation, and- null-free radiation patterns
Tip #2: Use stacked Yagis to produce broad null-free patternsthat cover the full range of needed elevation angles
Stacked Yagis require a tower 70 to 100 feet tall
![Page 16: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/16.jpg)
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Two Stacked 5 Element 20 Meter Yagison 48 Foot Booms, 50 and 100 Feet High
decibels
degr
ees
BOTH
100’
50 FT
Europe
18 degrees
5 degrees
![Page 17: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/17.jpg)
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12 degrees
Two Stacked 5 Element 20 Meter Yagison 48 Foot Booms, 50 and 100 Feet High
decibels
degr
ees
BOTH
100’
50 FT Asia/Pacific
4 degrees
![Page 18: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/18.jpg)
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Two Stacked 6 Element 15 Meter Yagison 48 Foot Booms, 47 and 94 Feet High
decibels
degr
ees BOTH
94 FT
47 FT
Europe
15 degrees
4 degrees
![Page 19: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/19.jpg)
02468101214161820
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Two Stacked 6 Element 15 Meter Yagison 48 Foot Booms, 47 and 94 Feet High
decibels
degr
ees BOTH
94 FT
47 FT Asia/Pacific
10 degrees
3 degrees
![Page 20: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/20.jpg)
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Two Stacked 6 Element 10 Meter Yagison 36 Foot Booms, 35 and 70 Feet High
decibels
degr
ees BOTH
70 FT35 FT
Europe
12 degrees
3 degrees
![Page 21: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/21.jpg)
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Two Stacked 6 Element 10 Meter Yagison 36 Foot Booms, 35 and 70 Feet High
decibels
degr
ees BOTH
70 FT35 FT Asia/Pacific
8 degrees
2 degrees
![Page 22: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/22.jpg)
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Two Stacked 3 Element 40 Meter Yagison 48 Foot Booms, 100 and 200 Feet High
decibels
degr
ees BOTH
200’100 FT
Europe
23 degrees
7 degrees
![Page 23: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/23.jpg)
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Two Stacked 3 Element 40 Meter Yagison 48 Foot Booms, 100 and 200 Feet High
decibels
degr
ees BOTH
200’100 FT
16 degrees
5 degrees
Asia/Pacific
![Page 24: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/24.jpg)
Secret #3: Stacks for Europe and Asia are Different!
Stacked Yagis that produce an optimum null-free higher angleradiation pattern for Europe…cannot produce the optimum lower angle pattern for Asia/Pacific
Stacked Yagis that produce an optimum null-free low angleradiation pattern for Asia/Pacific...cannot produce the optimum higher angle pattern for Europe
![Page 25: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/25.jpg)
Secret #3: Stacks for Europe and Asia are Different!
The solution is:
Tip #3: Use switchable stacks of three Yagis to select broadnull-free radiation patterns for either Europe or Asia/Pacific
![Page 26: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/26.jpg)
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Three Stacked 5 Element 20 Meter Yagison 48 Foot Booms; 50, 100, 150 Feet High
decibels
degr
ees
50 FT/100 FT
100 FT/150 FT
Europe
18 degrees
5 degrees
![Page 27: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/27.jpg)
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Three Stacked 5 Element 20 Meter Yagison 48 Foot Booms; 50, 100, 150 Feet High
decibels
degr
ees
50 FT/100 FT
100 FT/150 FT
Asia/Pacific
12 degrees
4 degrees
![Page 28: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/28.jpg)
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Three Stacked 6 Element 15 Meter Yagison 48 Foot Booms; 47, 94 and 140 Feet High
decibels
degr
ees
Europe
15 degrees
4 degrees
47 FT/94 FT
94 FT/140 FT
![Page 29: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/29.jpg)
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Three Stacked 6 Element 15 Meter Yagison 48 Foot Booms; 47, 94 and 140 Feet High
decibels
degr
ees
10 degrees
3 degrees
47 FT/94 FT
94 FT/140 FT
Asia/Pacific
![Page 30: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/30.jpg)
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Three Stacked 6 Element 10 Meter Yagison 36 Foot Booms; 35, 70 and 105 Feet High
decibels
degr
ees
12 degrees
3 degrees
35 FT/70 FT
70 FT/105 FT
Europe
![Page 31: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/31.jpg)
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Three Stacked 6 Element 10 Meter Yagison 36 Foot Booms; 35, 70 and 105 Feet High
decibels
degr
ees
8 degrees
2 degrees
35 FT/70 FT
70 FT/105 FT
Asia/Pacific
![Page 32: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/32.jpg)
Antenna Secrets of the Top Multi-Op Stations
Revealed !
Secret #1: Use All of the Right Angles
Secret #2: Eliminate Radiation Pattern Nulls
Secret #3: Stacks for Europe and Asia are Different!
![Page 33: Antennas Frank Donovan, W3LPL. Antenna Secrets of the Top Multi-Op Stations Revealed ! How do the top multi-op stations break those huge pileups so fast?](https://reader035.fdocuments.net/reader035/viewer/2022070323/56649dda5503460f94ad039c/html5/thumbnails/33.jpg)
Tips to Apply to Your Own Station
Tip #1: Design your antennas for as many of the right angles as you can. A good compromise is: 50 - 100 feet for Europe 80 - 100 feet (plus) for Asia/Pacific
Tip #2: Use stacked Yagis to produce broad null-free patternsthat cover the full range of needed elevation anglesStacked Yagis require a tower 70 to 100 feet tall
Tip #3: Use switchable stacks of three Yagis to select broadnull-free radiation patterns for either Europe or Asia/Pacific