[TowerTalk] 10M phased verticals

[Tim Duffy K3LR]

Hello Bill!

Three years ago I attempted to construct a proper four square phasing
network using four 5/8 wavelength elements and 1/4 wave spacing (on a side)
for 10 meters. I installed 60 ground radials - 5/8 wavelength long (60 per
element). I could never get acceptable pattern performance.

This last summer I converted the 5/8 wavelength elements to 1/4 wavelength
using a traditional four square phasing system. Performance is as expected
with 25 dB of F/B. 

We use this antenna exclusively for receiving. The 10 meter four square
pattern is similar to a Yagi antenna mounted at 50 feet above the ground.

73!
Tim K3LR

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Bill and Cindy
Sent: Monday, November 28, 2011 10:01 AM
To: towertalk at contesting.com
Subject: [TowerTalk] 10M phased verticals

Unfortunately my crankup is maxxed out with 15/20/40M yagis. I guess when
I put it up 6 years ago I thought the sunspots would never come back (I
read that in an article on the internet), so I didn't put up anything for
10M.... I've got 31 sq ft of yagis on a 30 sq ft rated tower....

I do not have XYL/neighbor approval or $$$ for a second tower, so for the
CQWWCW last weekend I put a ZeroFive 5/8 wavelength 10M vertical on a 6'
pole and set it up groundplane style with 24 down sloping radials off of 
a Lance Johnson Engineering round radial plate. It worked very well, way
past my expectations. And it is the perfect XYL antenna - this morning
I took the antenna off of the pole, slid the radial plate to the ground
and it was gone!

Would it be worth putting 2,3 or 4 phased verticals like this on 10M? I 
have had 40m and 80M 4-squares in the past and of course they were great.
There are commercial boxes available. Do the patterns hold up on 10M?

Thanks for any input !!!

Bill KO7AA in Tucson, AZ





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