Yes, you can do that but the coax needs to be grounded at the shack end.
A general rule with antennas is get as much wire or aluminium as high as
possible.
A more or less horizontal antenna at low level will perform to some extent,
but I would expect high angle radiation.
By way of example of odd things, at my alternative location I used to use a
30 foot fibreglass telescopic pole on a tripod with a wire taped to it, and
mounted on an earth stake. This worked well, as you would imagine, on 40m.
One morning, I woke and heard my friend 9J2BO and gave him a shout. We had
a 559 both ways contact for 20 minutes or so.
When my wife rose, she commented that the antenna had slipped down during
the night.
On examination, it was only about 9 feet tall, with the remaining wire
randomly strewn on the ground which was frosty.
You never really know what will happen until it does!
73
David W Wood
GUILDFORD PHYSIOTHERAPY AND SPORTS CLINIC
MATTHEWS HOUSE
85 EPSOM ROAD
GUILDFORD
SURREY GU1 3PA
T: 01483 575876 (APPOINTMENTS)
302691 (ALL OTHER INQUIRIES/FAX)
E: [log in to unmask]
W: http://tinyurl.com/5wptcp
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-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Shaun Oliver
Sent: Sunday, February 22, 2009 6:23 AM
To: [log in to unmask]
Subject: long wire antennas.
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hey guys, I'm considering building a long wire antenna. mainly, because
I want to, and to see if I can.
my question is, can I simply attach a predetermined length of wire, say,
roughly 40 meters, to the centre core of the coax and be done with it,
or do I need to have some kind of counterpoise in place?
I could always just solder the wire itself to the centre pin of a pl-259
and hope for the best, but, I've no wish to burn the bum out of a radio.
I've considered winding a 12:1 balun to negate the need for
counterpoise, but, I don't know how well that would work, and I dont'
have the patients to do that at the moment.
I realise that somewhere in the mix, I'll need a tuner, but, I'm not too
worried about that just yet. I need to get a radio first, haha.
if anybody's built a long wire or similar, I would appreciate your input.
another thing that is of interest to me, is how high, or rather how low
I can have the thing before I should give up on getting any kind of
signal out.
I'm restricted to 4 meters by she-who-must-be-obeyed.
I'm thinking of having the thing gently slope up to the 4 meter mark.
thanks in advance.
--
Shaun,
vk2fese,
"Cry 'havoc!' and let slip the dogs of war"
web sites:
http://www.myspace.com/blindmanshaunoliver
http://blindman.homelinux.org/~blindman/
skype: brailledude
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