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Doug Dotson
 
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Default Quadrafiliar Heliz antenna newsgroup?

What is really nice is the capability to capture multiple passes which are
automatically georeferenced and put them into into a sequence that can
then be animated. Same thing applies to WX FAXs although they have
to me georeferenced manually. Really allows you to see what is going
on. What would be nice is to be able to overlay WX FAX onto the
satellite image. Maybe in a future release.

Doug

"Glenn Ashmore" wrote in message
news:_bMsb.554$0K4.386@lakeread04...


Jim Woodward wrote:
We had a QH for weather satellites on Swee****er and I might do the
same on Fintry -- as a practical matter it's a fun toy, but you need
other weather information as well.


I like to put the picture beside the current surface analysis to get a
feel for what is happening. A sequence of 3 or 4 passes really shows
the movement of a weather system.

Why not just use copper -- the conductivity of stainless is only 2%
of copper, so there are surely some issues there?


Mainly for apearance. The QFH will mount on the stern rail at eye
level. My copper versions are hard copper tube and elbows. Soft copper
is to soft to stand up to a careless hand or a boarding wave. The
stainless tube looks less like a plumber's nightmare and will not turn
green.

The resistance of the stainless tube is the thing that worries me. The
balun design I came up with balances 1/2" copper tube to 50 ohms almost
perfectly but changing the diameter to 3/8" stainless is going to change
the impedance. I just don't know how much and in which direction.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
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