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Date: | Tue, 20 Jul 2010 07:55:13 -0400 |
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If the SWR is 10 to one and you actually want to use it that way, you have a
lot more problem than worrying about feedline. Of course depending on the
installation, the fact is, coax is better especially inside since ladder
line can radiate and can get you RF feedback if too close to the radio or
cause RFI. It depends on the install, I know people who never have that
problem, and some who always have that problem but as a rule, if running
ladder line, keep it outside. My problem where I live is trying to keep it
low profile and ladder line is certainly not low profile, it sticks out like
a sore thumb other wise I'd try to stick the cobra ultralite out there
somehow.
----- Original Message -----
From: "Howard Kaufman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, July 20, 2010 6:38 AM
Subject: Fw: Need some input on HF wire antennas for the Michigan house
>I forwarded the feedline comparison page to a friend of mine. I have no
> idea if it is speech friendly, but here are the surprising results of his
> test data.
>
> I put the first Wireman ladderline in. 100 feet. SWR 10 to 1. Power 100
>> watts. Frequency 30 megahertz. Loss is 1.33 dB. 74 watts is still
>> radiated.
>>
>> Then I put in Belden RG 58. Same parameters otherwise. Loss is 5.5 dB.
>> 29
>> watts radiated on 10 meters.
>>
>> Is coax that more convenient than ladder line???
>>
>> Thanks for the reference.
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