Antennas
Computer Calculated Gains

BCK50-4

10.12 DBI = 8.01 DBD
1-1/4" & 1-3/8' 6061-T6 Alum. Tubing
1/2" Alum. Elements
Wavelength .67
Length 13.1 FT.
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BCK50-5

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11.27 DBI = 9.17 DBD
1-1/4" & 1-3/8' 6061-T6 Alum. Tubing
1/2" Alum. Elements
Wavelength .88
Length 17 FT. 6 IN.
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BCK144-8

13.48 DBI = 11.38 DBD
1-1/4" & 1-3/8' 6061-T6 Alum. Tubing
1/2" & 1/4" Alum. Elements
Wavelength 1.90
Length 13 FT.
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BCK144-10

14.65 DBI = 12.55 DBD
1-1/4" & 1-3/8' 6061-T6 Alum. Tubing
1/2" & 1/4" Alum. Elements
Wavelength 2.57
Length 17 FT. 8 IN
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BCK146-4

10.47 DBI = 7.40 DBD
1-1/4" 6061-T6 Alum. Tubing
1/2" & 1/4" Alum. Elements
Wavelength .50
Length 3 FT. 4 IN.
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BCK146-5

10.47 DBI = 8.37 DBD
1-1/4" 6061-T6 Alum. Tubing
1/2" & 1/4" Alum. Elements
Wavelength .74
Length 5 FT. 6 IN.
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BCK146-6

11.24 DBI = 9.14 DBD
1-1/4" & 1-3/8' 6061-T6 Alum. Tubing
1/2" & 1/4" Alum. Elements
Wavelength .99
Length 7 FT.
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BCK222-14

16.5 DBI = 14.4 DBD
1-1/4" & 1-3/8" 6061-T6 Alum. Tubing
1/4" & 3/16" Brass & Alum. Elements
Wavelength 3.91
Length 17 FT. 5 IN
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BCK224-7

13.15 DBI = 11.05 DBD
1-1/4" 6061-T6 Alum. Tubing
1/4" & 3/16" Brass & Alum. Elements
Wavelength 1.30
Length 6 FT.
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BCK432-22

18.32 DBI = 16.22 DBD
7/8" x 1" 6061-T6 Alum. Tubing
3/16" Brass & Alum. Elements
Wavelength 6.77
Length 15 FT. 5 IN
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BCK432-27

19.30 dbi = 17.2 dbd

1-1/4" & 1-3/8"' 6061-T6 Alum. Tubing

3/16" Aluminum Elements

Wavelength 8.81

Length 20 ft 1 inch

BCK439-10

14.44 DBI = 12.34 DBD
7/8" x 1" 6061-T6 Alum. Tubing
3/16" Brass & Alum. Elements
Wavelength 2.49
Length 5 FT. 10 IN
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BCK439-22

18.30 DBI = 16.20 DBD
7/8" x 1" 6061-T6 Alum. Tubing
3/16" Brass & Alum. Elements
Wavelength 6.87
Length 15 FT. 8 IN
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BCKATV-SLOT

22 Elements
7 DBD
1'' 6061-T6 Alum. Tubing
Length 89.5"

Originally made by John Shaffer, W3SST

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