M2 Antenna Systems 249CP24, Инструкция по сборке

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249CP24 ASSEMBLY MANUAL
ASSEMBLY INSTRUCTIONS FOR THE 249CP24
Before beginning assembly, read over the parts list and check for missing or damaged parts. Contact the M2
Antenna Systems, Inc. directly, (559) 432-8873 if any discrepancy is found.
Tools required: A medium size flat blade screwdriver, an 11/32 nut driver or equivalent, a 1/2 inch wrench or
nut driver, a 7/16 inch wrench and a tape measure.
1. The driven element is partially assembled at the factory. Starting 13-3/4” (13.75”) from the rear of the
boom, mount this driven assembly to the boom so the two female “F” connectors point toward the front of
the antenna. Secure with an 8-32 x 1-1/4” screw. Next, slide the 3/16 x 23.0 inch long rod through the
open holes just below it and add two black button insulators. Center the rod in the boom. Add the shorting
blocks, positioning them at the ends of the shorter rod elements. When everything is adjusted, tighten up
the set screws.
2. Repeat this operation for the second driven element, mounting it at 25-1/4” (25.25”) from the rear and with
the two “F” connectors facing the rear driven element just installed and on the left side of the boom per the
sketch. Proper positioning per the sketch will guarantee RIGHT HAND CIRCULARITY.
3. Assemble the boom per the antenna dimension sheet, secure the joints with the 8-32 x 1-1/4” screws, lock-
washers and nuts. Final tightening and alignment will be done after the elements are all in place.
4. Now mount the phasing block 9-1/2” from the rear of the boom using an 8-32 x 1/4 inch screw. Position the
block on the same side of the boom as the rear driven element so the large “N” connector is facing to the rear.
REFER TO THE CABLE ASSEMBLY SKETCH FOR STEPS 6, 7 & 8
5. Connect the two 18.0 inch long balun cables to the two close spaced connectors on each driven element
block. Tighten the connectors first by hand and then gently but firmly with a 7/16 inch end wrench. TO
PREVENT POSSIBLE CABLE DAMAGE hold the body of the connector with pliers so it doesn’t rotate during
this final tightening operation.
6. Connect the long, 27-3/8” phasing cable to the single TOP connector on the FRONT driven element and
route the cable back to the side connector on the phasing block. Again, tighten both ends first by hand and
then finally with the 7/16 inch wrench.
7. Connect the short 9-1/8” phasing cable to the single connector on the rear driven element block and route
the cable to the in line connector on the phasing block. Tighten as before.
8. Once the cables are all in place form them neatly against the boom and hold in place with the black nylon
ties. In places where director rod elements will come through the boom, do not tighten the nylon ties all the
way so the cables may be moved slightly for clearance around the rod elements.
INSTALLING THE ELEMENTS
9. Separate the rod elements into two (2) sets. Using just one set, install the 22-7/8” rod element in 5/16 inch
diameter hole 5 inches form the rear of the boom. Use the black button insulators on either side where the
element passes through the boom. At this time just position the element near center. Final centering can be
done later when all the elements in one plane are in place.
10. The elements taper in length so continue installing the rods down the boom using the button insulators as
described in step #10.