[Antennas] 30 Meter Ground plane

Wed, 25 Feb 2004 08:14:20 -0600 (GMT-06:00)

You might try tilting the radials downward.
If I recall correctly, that by doing so will help to raise the feedpoint impedance to 50 Ohms.
73,
Jon
KD5SFA

-----Original Message-----
From: WX5L <[email protected]>
Sent: Feb 25, 2004 6:35 AM
To: [email protected]
Subject: [Antennas] 30 Meter Ground plane

Hello,

For an afternoon project I built a 30 meter ground plane.

I used the base section of an old 14AVQ and used some tapered aluminum
sections to obtain the 23' 1" I needed. Also installed 4 radials in a
horizonal plane 5% longer.

The base of the vertical is 15' above ground on a steel mast. I also have
the base of the vertical grounded with 3/4" braid to a 8' ground rod.

I found the resonant point just about where I wanted but the lowest swr is
1:7. I checked it with my MFJ anatenna analyzer and found the impedence
around 33 ohms.

I'm looking for a way to match this 33 ohms closer to 50 ohms and keeping
the RG8U that I'm using.

I'm looking for not the most complicated way but KISS and use spare parts
from my junk box.

Any idea's.

Thanks,

Randy

[email protected]
Thibodaux, Louisiana

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