[HCARC] Antenna Questions Of The Day

[Gary and Arlene Johnson]

ARRL has a new book out called "Antenna Modeling For Beginners".  Maybe I 
should invest - probably still over my head.

Gary J
N5"BAA"


----- Original Message ----- 
From: "Gary and Arlene Johnson" <qltfnish at omniglobal.net>
To: <hcarc at mailman.qth.net>
Sent: Sunday, September 23, 2012 2:44 PM
Subject: [HCARC] Antenna Questions Of The Day


> Some Vertical Antenna Questions:
>
> Does the material a vertical antenna is made of affect its calculated 
> length.  In essence, does it make any difference if the antenna sections 
> are made from Copper, Copper plated steel, Aluminum, or wire attached to 
> PVC pipe??  Does diameter of the tubing make a difference??
>
> How does antenna made up of tapered sections compare to one made from 
> straight tubular sections with no taper??
>
> If a roller inductor that has a diameter of approx 1 inch core diameter 
> with 20 turns of wire on it (wire length approx 5 feet - 3.14 x 1 x 20) is 
> wired into the antenna, how does it affect the antenna??  If set to max 
> length in this case would it effectively add 5 feet to the antennas 
> length??  If none of the above, how does it affect the antenna.
>
> Does the ability to add or remove antenna sections in approx 2 foot 
> intervals affect the ability to tune the antenna between the various 
> bands??  Assuming the antenna is not energised, can sections be added or 
> removed to effectively change the band the antenna is resonant on??
>
> For 80 meters, 40 meters, 20 meters and 10 meters (and the odd bands in 
> between) what would the approx best antenna length be??  I have seen 
> advertisments for all band 43 foot verticals and remember someone talking 
> about a 33 foot vertical as being best.  It is OK to answer 40 and below, 
> or 80/40, or 40/20, or whatever.
>
> I know, I know - Get your radio built and just start talking - I am 
> working on it, but being very careful in the contruction.  I have never 
> done this kind of kit thing before and I am making sure I do it right the 
> first time.
>
> 73's
>
> Gary J
> N5"BAA"
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