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Subject:
From:
Steve Forst <[log in to unmask]>
Reply To:
For blind ham radio operators <[log in to unmask]>
Date:
Tue, 20 Jul 2010 09:56:33 -0400
Content-Type:
text/plain
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text/plain (44 lines)
Howard,

If you are referring to the feed line loss calculator I posted a few days 
ago, it is speech friendly.  Works fine with JAWS.  BTW besides the coax 
choices, there are also a number of open wires you can select: 300, 450, and 
600 ohm.   You can calculate some of them as being "wet".

A bit further down the page, there is also a antenna gain calculator, where 
you enter line loss, power, and antenna gain to get your ERP.

I'm sure there are a number of such sites on the net, but I just threw this 
one out to Tom as he is still in the planning stages for the new set up.

Here is the link again:

http://www.ocarc.ca/coax.htm

73, Steve KW3A


----- 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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