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Old May 11th 05, 04:58 PM
Frank
 
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"Fred W4JLE" wrote in message
...
What is the basis of your "high loss method" statement?

"Frank" wrote in message
news:O7pge.61496$tg1.25181@edtnps84...

I never liked the G5RV antenna since it just seemed like a high loss

method
of feeding a 102 ft piece of wire.

Frank
VE6CB


The following is based on an analysis I did for a ham Friend. Consider a 102
ft bent dipole (REF: Richards Antenna v4), fed in the center with 33ft of
300 ohm tubular, followed by 25 ft of 75 ohm twin.

Frequency Total feedline loss
(MHz) (dB)

1.8 24.8
3.8 4.9
7.1 2.4
10.1 10.2
14.1 1.4
18.1 3.0
21.2 9.1
24.9 2.7
28.5 3.9

If you are interested I can e-mail you the complete analysis in Microsoft
Word showing various feedline combinations from 1.8 to 30 MHz. If you have
a particular structure in mind I can also do the analysis. I use NEC2 based
software in combination with the ARRL's transmission line analysis program.

Regards,

Frank
VE6CB


 
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