[600MRG] Some advice needed...as usual
Kenneth G. Gordon
kgordon2006 at frontier.com
Sat Dec 14 17:25:46 CST 2013
OK. I need to install a remote antenna tuner. The unit I am building
is pretty big, but will do the job.
The advice I need from you kind folks is, what sort of container can
you suggest that will be water-tight and yet easily opened to work
in?
Some sort of plastic picnic basket or somethin' ?
To fill you in a little bit: The rotary coil I am using is out of the
BC-939 antenna tuner that originally was part of the BC-610
transmitting setup.
Since the coil is quite large and somewhat difficult to turn, I am
using an old satellite TV dish mover and control to operate it.
There will also be two fairly large relays in the box.
The coil is 14" long, 9" wide and 8" high and has 1/2" thick ceramic
end-plates. The satellite TV dish-mover has a gear-motor (with
position sensors) that is 3" wide, 5" tall, and about 9" deep with
the shaft sticking out of it.
So, overall length with the drive attached to the coil will be on the
order of 23".
Ideas?
As soon as I can get my large base-loading coil finished (8" diameter
PVC and about 600 mH), I'll need to be able to switch that into and
out of the base of my 55' vertical.
I intend to use the BC-939 coil in series with the big coil to enable
me to QSY a bit at 630 meters.
Ken W7EKB
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