[Antennas] question regarding dipole

2002年3月18日 20:17:50 -0800

Was there not a URL with info on this subject mentioned awhile back?
If so could someone list it again?
Chris opr VE7HCB
At 11:09 PM 2002年03月18日 -0500, Don Havlicek wrote:
>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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>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
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