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Topband: Inveted L Matching

To: <topband@contesting.com>
Subject: Topband: Inveted L Matching
From: "Ron Real" <wr5rr@sbcglobal.net>
Date: Sun, 3 Dec 2006 18:28:18 -0600
List-post: <mailto:topband@contesting.com>
My Inverted L is 53 ft high supported with a 3 ft arm, and the horizontal 
extends 70 ft to a tree at a 30 ft elevation. So far, I have about 9 random 
length radials on average ground.  The shortest is about 40 ft, and the longest 
about 90 ft.  The 90 ft radial is tied to a metal fence.  The vertical section 
is secured with an insulator, and the coax connector is mountedin PVC fittings. 
 This PVC housing is attached to a driven 8 ft ground rod, and the coax shield 
is connected to the top of the ground rod, and the radials are attached to the 
rod via a ground rod clamp.  I have connected a 1 Meg ohm 1/2-watt resistor 
from the coax center connector to ground to disipate static.     My question is 
how to match this antenna for better SWR.  I have a fairly broad 2:5 swr b/w 
from 1845 to 1955, but the SWR at the center of this range is still 2:1.  My 
MFJ 259 reads the lowest swr at 1895 and 100 ohms impedance.  Most everything I 
have read indicates I should have a low resistance, a
 nd match with a capacitor.  I realize the loss is not great, but is the Unun, 
or some other inductor what I need to add?  I know I need more radials, and I 
will add more as I can.  The ground is covered with 8 inches of snow at the 
present time.  Thanks 73 RonWR5RR
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