[Amps] Hmmmm...Legal limit boiled the oil in the cantena

[TexasRF at aol.com]

The corona ball at the tip of a mobile antenna is really important to  
proper standing wave management. If it is completely symmetric, then  
omni-directional radiation is assured. If it is asymmetrical, then increased  field 
strength can be obtained by proper orientation of the asymmetry. If it is  
inverted cone shaped, the angle of radiation is lowered and concentrated.
 
Any CB field strength contester is aware of these little known  phenomena.
 
73,
Gerald K5GW
 
 
 
In a message dated 4/7/2010 9:38:26 P.M. Central Daylight Time,  
garyschafer at comcast.net writes:

Standing  waves on the antenna are necessary for it to radiate. They are  
not
necessary to transfer power from the plate of the tube.

I hope  that Bill Orr book arrives soon.

73
Gary  K4FMX

>  -----Original Message-----
> From: amps-bounces at contesting.com  [mailto:amps-bounces at contesting.com]
> On Behalf Of Bill, W6WRT
>  Sent: Wednesday, April 07, 2010 9:36 PM
> To: Amps reflector
>  Subject: Re: [Amps] Hmmmm...Legal limit boiled the oil in the cantena
>  
> ORIGINAL MESSAGE:
> 
> On Wed, 7 Apr 2010 15:39:03 -0400,  "Gary Schafer"
> <garyschafer at comcast.net> wrote:
> 
>  >Reflected power reaching the tube plate, not likely.
> 
>  REPLY:
> 
> Not so. With the antenna connected directly to the  plate (or through a
> DC blocking capacitor) I guarantee you there will  be some reflected
> power returning back to the plate. Why? Even a  perfectly resonant
> antenna does not radiate 100% of the power fed to  it on each half
> cycle. Some power is reflected back from the end of  the antenna to the
> feed point  (plate of the tube) where it  combines with the next half
> cycle. Antennas 101.
> 
> The  only exception would be an infinitely long antenna, and you are
> not  likely to ever see one of those, especially mobile.  :-)
> 
>  However, that reflected power does not contribute to SWR if there is
>  literally no transmission line. It's just reflected power.
> 
>  73, Bill W6WRT
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