I've just re-read your question. So, the twin lead is not for the feeder,
it's for the arms of the doublet, or possibly both. I presume to widen the
frequency response. There are some interesting ideas for using ribbon as
antennas.
If it's the pale pink variety, the only thing I would advise is to make sure
you water-proof the cut ends because it will drink water by capillary action
and rapidly rot the copper inside. This happened to me many years ago. If
it's the black ladder line, I would say it is quite heavy compared to single
wires.
Otherwise I see no particular problems.
David
G3UNA
----- Original Message -----
From: "Jozef Hand-Boniakowski" <[EMAIL PROTECTED]>
To: "Robert Tellefsen" <[EMAIL PROTECTED]>
Cc: <Elecraft@mailman.qth.net>
Sent: Tuesday, August 14, 2007 5:02 PM
Subject: Re: [Elecraft] Twin Lead feedline
I have been using TruValue twin lead at $14/100 feet for the past 4 years
on both my G5RV and my 40 meter loop. Works just fine. Best bargain
around. Since I only need 40 feet on either antenna, if it goes bad, I
just use the other half of what is left with some to spare.
Jozef WB2MIC
PS. The antenna wire is leftover electric fence wire now over 22 years
old. Cost per antenna per year is quite low. :)
Robert Tellefsen wrote:
Thom
There are various grades of 300 ohm twinlead.
Some are very cheap and have pretty skimpy
conductors. Some are good quality. There is/was
at least one version that was suitable for transmitting
(power level not stated that I can recall). If you
have some of the good quality stuff, you can probably
do 100w just fine. I'd watch out for the skimpy stuff,
though.
Good luck and 73
Bob N6WG
----- Original Message -----
From: "Thom LaCosta" <[EMAIL PROTECTED]>
To: <Elecraft@mailman.qth.net>
Sent: Tuesday, August 14, 2007 4:26 AM
Subject: [Elecraft] Twin Lead feedline
It's been years since I melted 300 ohm twin lead...
Can I use it for a 44 foot each side of center doublet at 100 watts out?
I
can't find any other open wire feedline locally, and I need to get
something up
in the air....I keep on walking into the slinky that runs down my
hallway.
I'm thinking at 5 watts it will pass...just not sure what will happen at
100
watts.
Thanks
73 k3hrn
Thom,EIEIO
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