[Antennas] question regarding dipole

2002年3月19日 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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>> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
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- - -
Your moderator for this list is:
Larry Wilson KE1HZ [email protected]
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