DH Satellite GIBRALTER IV MOUNT - Manual (Page 12)

C14F
KU4FL
For Chaparral (universal) Feed (C14F)
Page 7
Unless you have specified what brand and frequency
your feedhorn is, you will have received by default the
C14F collar. It is best if you have discussed with your
sales rep the feedhorn you are using prior to shipping
so that DH can make sure you have the proper collar to
mate to your feedhorn. You do need to make sure your
feedhorn and collar are the correct combination.
Take the collar and set it on the back of the scaler ring
of the feedhorn. Turn it until all three holes line up
between the two and insert the 1/4" x 3/4" bolts
through the scaler ring and then through the collar;
fasten with the 1/4" nuts. Most C-band and dual feeds
have a 3-bolt pattern on the scaler just for this (see
Figure #11 and the drawing on page 9). Now, slide the
end of the strut with the two 1/4" holes into the feed
bracket as shown in Figure #11. Fasten with the 1/4"
and 1 1/2" bolts and nuts. Do this on all four struts.
Place the flattened end of the struts onto the antenna
and use the 1/2" x 3" bolts to fasten to the dish. Use
every third hole.
Check to see the feed is at the focal length,
then tighten all bolts. The actual focal length should be 1/4"
inside the waveguide for C-band and l/8”for Ku band. See
Figure #11.
Preparing the Feed Assembly ______________________
Antenna Size Focal Length F/D Ratio
10' (3.0m) 36” f/l .3 f/d
11' (3.3m) 36” f/l .27 f/d Discontinued
12' (3.7m) 57.6” f/l .4 f/d
12’5” (3.8m) 57.6” f/l .38 f/d
12' 9" (3.9m) 57.6” f/l .375 f/d Discontinued
14' (4.2m) 57.6” f/l .35 f/d
14' 9" (4.5m) 57.6” f/l .33 f/d
16' (5.0m) 57.6” f/l .3 f/d
If the feedhorn you have selected has an adjustable scaler ring, move it to the proper wave guide setting as per
the manufacturer's instructions. Below we have listed the focal lengths and focal length/diameter ratios for our
commercial antennas. Just find your antenna and you will have the information to set the scaler properly.
NOTE: Strut length includes bent end.
½” x 3” Bolt
1/4” Lock Washers & Nuts
3/4” Feed Strut
Collar
¼” x 1 ½” Bolt
½” Rubber Washer
Antenna Surface
½” Steel Washer
½” Nut
For heavy duty SEAVEY (C24HD) or heavy duty CHAPARRAL (C14FHD) feed assembly please
refer to page 8 and page 9.
Figure# 11