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Healy, Rus wrote:
>
> Anybody know whether the Cushcraft 12-4CD has the same element tubing
> schedule as the 15-4CD or the 10-4CD? And, for that matter, what the
> element center tubing sizes are for each of these antennas?
Here are my YO files. El diameters at top of column, lengths below.
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Cushcraft 10-4CD
28.000 28.500 28.700 MHz
4 elements, inches
0.8750 0.7500 0.5000
0.0000 25.0000 44.0000 36.5000
52.0000 25.0000 44.0000 32.5000
104.0000 25.0000 44.0000 29.5000
187.5000 25.0000 44.0000 18.0000
These are dimensions #1 for CW and low phone.
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Cushcraft 20-4CD
14.000 14.100 14.250 MHz
4 elements, inches
2.6795 1.2500 1.1250 0.8750 0.6250 0.5000
0.0000 3.0000 15.0000 68.0000 44.0000 32.0000 54.5000
105.0000 3.0000 15.0000 68.0000 44.0000 32.0000 46.0000
210.0000 3.0000 15.0000 68.0000 44.0000 32.0000 41.0000
378.0000 3.0000 15.0000 68.0000 44.0000 32.0000 16.5000
These are dimensions #1 for CW and low phone.
The innermost taper sections represent the 4" by 6"
element-mounting plates.
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Cushcraft 12-4CD
24.940 MHz
4 elements, inches
2.0000 0.8750 0.7500 0.6250 0.5000
0.0000 2.0000 23.0000 45.0000 45.0000 6.0000
2.0000 0.8750 0.7500 0.6250
67.6250 2.0000 23.0000 45.0000 45.0000
114.9500 2.0000 23.0000 45.0000 42.5000
209.9500 2.0000 23.0000 29.0000 44.0000
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