CHANNEL MASTER 84 cm Elliptical Antenna Modification for Multiple Feed Bracket (Right side pictured, as viewed from rear of antenna) Locate this horizontal  brace (just below pictured feed bracket attachment). About 1 inch above the horizontal brace, drill a 1/4 inch hole centered in the middle of the rim.  Repeat on left rim of antenna.
DBS LNBF with 4-inch Adjuster,          Mounted Upside Down	Carefully thread the two 1-inch x 1/4 inch bolts into LNBF bracket with a 7/16-inch box end wrench, equally on each side until they are secured.  Center the straight bar within the clamps so that the etched marking is midway between the above two bolts.  Wrench the 1/4-inch nuts with a 7/16 open end wrench to secure the bar within this clamping device. Remove the outer nut and bolt from the clamp that is on the straight end of the side-bar pieces.  Slide the clamps off the side-bars and loosely install into the 1/4 inch holes drilled on both sides, with a flat washer on each side of the fiberglass rim.  Tighten with 7/16-inch open end wrench so the straight end of each side-bar can be easily installed.  Carefully slide the side-bar pieces onto the center straight bar so that the compression fitting is fully engaged.  Push the straight end of each side-bar into the clamps installed on each rim.  Slight bending may be required to match position of the clamps.  Re-install the nut and bolt on each clamp.  Get a large pair of crescent wrenches and securely tighten the two compression fittings, and then use the 7/16-inch wrench to securely tighten the clamps on each rim edge.
DBS LNBF with standard Adjuster	84-E Antenna with Ku LNBF at Center 1 DBS LNBF on left, 2 on right.  Sidebars not installed	Pansat PF-7600 Linear Ku-LNBF             with standard Adjuster

Installation of the Center LNBF should be done first.  Try to install so that the center of front throad is about two inches above the straight bar.  Install between the two attachment clamps at center, aiming as close as possible to the middle of the reflector.  Rotate the antenna up and down, left and right for best signal on the satellite that will be at center.  If this is a Ku-band type, rotate clockwise or CCW for best signal.  Please note that when using DBS LNBFs, there is no need to worry about this rotation angle, also known as Skew.  As long as the LNBF is at the point of strongest signal, also known as the Focal Point, you can point it upside down if necessary.  This may be necessary to avoid physical interference from an adjoining LNBF.    Just waterproof so that moisture does not collect anywhere. Our LNBF clamps are made of hose clamps drilled with 1/4 inch holes to match our adjusting hardware.  Larger diameter clamp is needed when using a 40mm outside diameter neck such as found on the PF-7600 shown above right.  Rotate linear LNBFs for best signal and then carefully tighten a bit more for security. GLOBAL COMMUNICATIONS S-9141  State Highway 23 Plain, Wisconsin   53577   U.S.A. Tel  (608) 546-2523     Fax  (608) 546-2157 E Mail   globalcm@mhtc.net

Initial signal is found on the center LNBF.  Before installing other LNBFs, make sure that the dish is secured tightly so that nothing will move.  Any moving of the dish after this point will un-do a lot of work.  Go to the Satellite Pointing Angles section of the GLOBAL COMMUNICATIONS website and write down the elevation and azimuth angles for the satellites you intend to receive from your location.  Based upon the position of the "center" LNBF, the positions of other LNBFs will be above or below and left and right of it.  With numbers in hand, remember that this acts much like a mirror.  Looking at the front of the dish, satellites to the west will appear on the right (or east side), and vice versa.  Satellites with lower elevation angles than the center satellite will appear higher than the center reference LNBF.  High elevations = below center.  You need to carefully find each signal while using satellite equipment, after using these numbers and advice as a guide. Center picture just above shows dish centered on Ku-band satellite at 72 West, with DBS satellites at 61.5 West on left, and 82 plus 91 West on right.   Local Coordinates At Picture Location  (Plain, WI) Satellite        ELEVATION      AZIMUTH 61.5 W         32.5                     141.5    Up and Left 72.0 W         36.9                     154.5    Center 82.0 W         39.5                     168.3    Down & Right 91.0 W         40.1                     181.3    Down & Right