TopBand: Re: Flags and Pennants

[Earl W Cunningham]

Hi, Ron,

You wrote:
"Does the resistor give these antennas their front to back? If I took out
or bypassed the resistor, would that give me signals off the back?  I'm
curious as I don't have room on this lot to make up 4 flags, etc."

Yes, the resistor is what makes the antenna unidirectional , among other
things.

If you short out the resistor, at 1.83 mHz the pattern will be slightly
oval in shape, with zero front-to-back and about 3.5 dB down off the
sides and the feedpoint Z will be about 2.7 - j1725 ohms.

If you open the resistor, at 1.83 mHz the pattern will be perfectly
circular and the feedpoint Z will be about 1.0 + j520 ohms.


"I really like this flag however I'd like to get it as high as I can. 
Maybe it's supposed to be close to the ground but that idea is even worse
as I don't have the room."

Putting it up higher buys you hardly anything, really.

73, de Earl, K6SE


___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]

--
FAQ on WWW:               http://www.contesting.com/topband.html
Submissions:              topband@contesting.com
Administrative requests:  topband-REQUEST@contesting.com
Problems:                 owner-topband@contesting.com