[Antennas] question regarding dipole

Tue, 19 Mar 2002 00:28:39 -0500

Thank you for your kind and gentle explanation of  the errors of my ways. I
am forever repentant!

Mike / W8DN

----- Original Message -----
From: "Don Havlicek" <[email protected]>
To: "Mike Rhodes" <[email protected]>
Cc: <[email protected]>
Sent: Monday, March 18, 2002 11:09 PM
Subject: Re: [Antennas] question regarding dipole

This is another ridiculous comment by someone who does not understand
what 'RF exposure standards' really means at HF!
If this antenna was a microwave dish with power at the focus of over 20
watts, THEN it MIGHT be a problem.
At HF, it would take MEGAWATTS into a dipole at near field exposure to
be in the realm of 'dangerous'.
At 100 watts .. you could hold the antenna wire [insulated, of course]
in your hand all day during a contest and not suffer 'exposure'
problems!
Please become more informed BEFORE you offer an OPINION.
Don - N8DE

Mike Rhodes wrote:
>
> I'm not so sure I would want to be the one sitting on that deck when you
are
> cranking out 100W. I would think that would significantly exceed the RF
> exposure standards. But then again, it might save the cost of a Vasectomy.
>
> Mike / W8DN
>
> ----- Original Message -----
> From: "Joe Falcone" <[email protected]>
> To: <[email protected]>
> Sent: Monday, March 18, 2002 5:25 PM
> Subject: [Antennas] question regarding dipole
>
> Hello:  I want to run a dipole for 40 meters, 33 feet for each leg, under
my
> second story deck.  I was  going to use insulated wire and staple the wire
> to the underside of
> the
> supports of the deck. Purpose of the antenna is just to hook up to when I
am
> on the deck to work some  100 watt CW.
>
> I am going to fit the 66 feet of dipole into 40 feet by simply running the
> wire in a pattern like this  _|~~|__|~~|________ center
> __________|~~|__|~~|__   You get the
> picture.  (I made the top lines wavy only because I did not know how to
type
> them straight.  The wire  will run in straight lines).
>
> My question is:  Is there some type of rough rule of thumb on changing the
> lenght of the wire if you are  going to shorten the total lenght of the
area
> that the dipole is going
> to fit into, or doesn't it matter?  Would I still use the 33 feet?  This
> antenna will be up about 8 feet  from the ground, but the land slopes away
> from the house.
>
> Thanks, Joe. N8TI
>
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>
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>
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Your moderator for this list is:
Larry Wilson KE1HZ [email protected]
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