Subject: | |
From: | |
Reply To: | |
Date: | Tue, 20 Jul 2010 09:56:33 -0400 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
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.
>
|
|
|