[K6BW] Club's TH7 is QRV!

[ab6mt]

Needless to say, GREAT!!

Bill
----- Original Message ----- 
From: David Mueller 
To: k6bw at mailman.qth.net 
Sent: Sunday, September 04, 2005 6:43 PM
Subject: [K6BW] Club's TH7 is QRV!


Hi everyone...
   Over the past two days, I successfully got the TH7
triband yagi up in the air, mounted on a short tower
section on the shack's roof.  Here's a photo of the
installation:

http://www.n2nl.net/gallery/K6BW/Picture_070

The antenna is about 14ft above roof level, the
highest I could safely mount it without making the
whole assembly top heavy.  Any higher and the element
tips get caught badly in the tree tops.  At it's
present height, the antenna can be manually rotated,
but two of the element tips need to be massaged around
tree branches.  

The SWR seems decent, below 2:1 on all three bands,
and  it has some OUTSTANDING front/back.  Pointed
East, the W4's were loud on 20, with nothing heard out
of Asia.  Beaming JA, the W4's disappeared and I heard
(and worked) a few loud JA's I didn't hear previously.

I think the antenna will work well in it's current
location until we can get the crank-up tower
installed.  I'm probably going to tackle that task
over my Xmas school break, when I'll have a month off.

Over the next month, I hope to get some more effective
wire antennas installed for 40, 80, and 160.  I'm
planning a sloping 160m dipole with one end at the
very top of the tower, a full size 80M delta (or
diamond) loop, and something for 40 - possibly a
Lazy-vee array that should give about 5Db gain over a
dipole.

73, Dave N2NL

PS - I'm noticing some very bad 60hz line noise on
15M, up and into the 10M band.  I'm going to work on
tracking down the source with a portable radio.  It
might even be coming from the shack itself; I'm not
sure yet.  It's loudest pointed East, and it may be
coming from the power lines at the bottom of the hill
a hundred yards in that direction.  

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