[AReU] Fw: Double It

[Tony Stone]

----- Original Message ----- 
From: Tony Stone
To: AREU GROUP
Cc: BOB HAYNES
Sent: Saturday, August 25, 2007 7:16 PM
Subject: Fw: Double It


I thought I would give you my opinion on the AREU reflector to see if any 
one else had a better idea.

If you have a doublet that covers from 40 to 10 meters it will perform 
almost exactly like a dipole cut
for 40 meters. At the higher frequencies all of the power will still be 
radiated from the doublet but the
pattern will change. There will be only two lobes at 40 meters with either 
antenna but at progressively
higher frequencies there will be more lobes. I believe the number of lobes 
doubles with frequency.
To explain, there will be four lobes at 20 meters with the doublet and each 
lobe will be 3 db down
from the original lobes at 40 meters given the same power into the antenna. 
If you were to shorten
the doublet to close to a half wavelength at 20 meters there will again be 2 
lobes with each 3 db
stronger that the original 4 lobes with the doublet cut closely to 40 
meters.

If anyone can explain it better, have at it.

Hope this helps.

Tony


----- Original Message ----- 
From: Bob Haynes
To: Stone, W4TAS Tony
Sent: Saturday, August 25, 2007 3:19 PM
Subject: Double It


I realize doublets can be used with a tuner to work on many bands, but for 
use on any one frequency,
how does the performance of a doublet compare to a dipole at the same 
height, cut to the exact correct length,
with a good balun and good coax?


Have a GREAT day!
Bob WB4AKA



No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.484 / Virus Database: 269.12.4/969 - Release Date: 8/23/2007 
4:04 PM