maco_SHOOTING.pdf

ASSEMBLY INSTRUCTIONS

SWITCHABLE

8 ELEMENT BEAM

SHOOTING STAR

Mac0 Manufacturing Co. - Division of Majestic Communications, Inc.

4091 Viscount - Memphis, Tennessee 38118 (901) 794-9494

MAC0 SHOOTING STAR

PARTS LIST

PART GTY O.D. SIZE

DESCRIPTION

CHECKLIST

T51P 2

TllP 8

TO1 12

PO2P 1

GOlP 2

WO4P 1

FAlP 4

2” .047”

518” .047”

l/2” .035”

5”x1/4”

72”

5”

Alum. Tubing swaged both ends

Alum. Tubing slotted one end

Alum. Tubing slotted both ends

Alum. Tubing

2” Boom to 2” Mast Plate

11 Meter Gamma Matches

Copper Wire

Fiberglass Rods

14 GA.

40’

48”

HARDWARE BAG #l

UOl

2”

Plated U-Bolts

HARDWARE BAG #2

so1

2”

Plated Saddles

BE2P 8

2”

HARDWARE BAG #3

Element-to-Boom Mounts

HARDWARE BAG #4

W58P 16

PL2P 12

PLSP 1

S21 26

Nil 28

PLSR 1

NO1

518”

.437”

2”

lo-24

2”

5116”

#lO

l/2”

12”

Alum. Clamps

Plastic Caps - Black

Plastic Cap - Black

Machine Screws

Square Nuts

Plastic Caps - Red

Hex Nuts

Lockwashers

Flat Washers

Gamma Straps

Gamma Straps f/ Coax Connectors

Coax. Conn. w/ Mounting Nut

NO2

N12

N26

ZO2P

4”

ZO8P

S42

WHEN ORDERING REPLACEMENT PARTS, ALWAYS GIVE PART NUMBER AND DESCRIPTION.

PLEASE NOTE: In an effort to keep the price on Mace Antennas down, we have decided not to cleanup all the burrs and rough

edges on the parts. We recommend that you deburr and clean up each part with files, sandpaper, etc. so that they go together

easily. We are aware this needs to be done, but have elected not to do it to save you the money we would have to add to the

price of the kit for this service.

SHOOTING STAR

MAC0 SHOOTING STAR

ASSEMBLY INSTRUCTIONS

FIGURE 1

GENERAL INSTRUCTIONS

This drawing depicts an overall view of what the antenna should look like upon completion of

assembly. Refer to Figures 2 thru4 for specific assembly details. All hardware should be coated with a silicon

rubber sealant or a similar compound to insure that wind vibration does not cause it to work loose.

FIGURE 2

BOOM ASSEMBLY

To assemble the boom, slide the slotted ends of the boom sections (T51P) onto both swaged ends

of the center boom section (T41P). Secure both joints with 2” U-bolts, saddles and hardware as shown in

detail 2A.

Next mark the boom center and mount the boom-to-mast plate (PO2P) using 2” U-bolts, saddles and

hardware as shown in detail 2B.

This antenna is designed for mounting on a 2” O.D. heavy duty mast. Mount using 2” U-bolts, saddles

and hardware as shown in detail 2C.

FIGURE 3A ELEMENT ASSEMBLY

Prior to assembling elements, slide a boom-to-element mount (BE2P) onto each of the 8 element

center section (T 11P).

Assemble each element as shownusing the clamps and hardware specified. Refer to the element table

to determine dimensions for each element. Install a blackplastic cap (PL2) onto both ends of each element.

Assemble the reflector elements in the same manner, sliding the fiberglass arms approximately 6

inches into the ends of the center sections (T 11P). Snug the clamps, but don’t tighten them at this time because

the arms will have to be adjusted after installing the reflector wire.

FIGURE 3B ELEMENT MOUNTING

Mark each element at the center and be sure that the boom-to-element mounts (BE2P) are centered

on the elements before tightening hardware.

Starting 1 l/2” from the director end of the boom, mount each element using 2” U-bolts, saddles,

boom-to-element mounts and hardware shown. Refer to Figures 1 and 3B for element spacing instructions.

MAC0 MANUFACTURING, 4091 VISCOUNT AVE., MEMPHIS, TN 38118

For parts or information call (901) 794-9494.

SHOOTING STAR

FIGURE 3C REFLECTOR ASSEMBLY

The length ofthe reflector wire is very critical. REMEMBER: The Reflector dimensions are only

preliminary. Change to get equal side of 9’ 6”. Fiberglass length is not critical, however, the equal wire

length of 9’ 6” is very critical. It must be the correct length to operate correctly. Take the wire (WO4P)

and uncoil it making sure that there are no kinks; secure it to a nail. Pull the wire until it stretches an inch

or so. The easy way to get the correct length for the reflector loop is as follows

1. Drive 2 nails in a board or fence l/2 the length of the loop apart --which is 228” (5.79Om) between

them.

2. Stretch the wire around the nails by hand as tightly as possible and splice ends together. Solder

the splice. Remove one nail and remove the loop. Cut any excess wire off.

3. Loosely assemble the machine screws (S21), flatwashers (N26), lo&washers (N12), and hex nuts

(NO6) onto the lugs of the fiberglass arms, adjusting the length as shown.

4. Tighten 3 of the 4 clamps that hold the fiberglass rods.

5. Install the wire as shown.

6. Tighten the wire by pulling the fourth fiberglass rod until the wire is the same tightness as it was

around the nails. The wire loop is now the correct length. Note the total length of the loop

is critical, and also is the length of each side.

FIGURE 4

GAMMA MATCH MOUNTING

Mount the (2) gamma matches (GOlP) to the horizontal and vertical driven elements, using the

gamma straps (ZO2P, ZO8P) and attaching hardware as shown. Attach your 52 ohm coaxial cables to the

connectors (S42) and dress along boom and down the mast.

ADJUSTING STANDING WAVE RATIO

Refer to Figure 4. The dimensions given are approximate and should be used as a starting point.

The following instructions cover the adjustment ofone gamma match. To adjust the second gamma match,

simply repeat this procedure.

The gamma matchhas 2 adjustments. First is the capacitor adjust and the second is the slider adjust.

Connect a S.W.R bridge to the coax between your transmitter and the antenna and check the S.W.R. If

adjustment is required loosen the clamp on the gamma match and the screws holding the slider (Gamma

Straps ZO2P). Next move the capacitor adjustment first in one direction then the other until a minimum

S.W.R. reading is obtained. If S.W.R. is not yet satisfactory, move the slider out 2” away from the boom.

Ifthe reading has gone up, move the slider back to the original position and then 2” toward the boom. Now

readjust the capacitor for minimum S.W.R. you should now be able to determine which direction to move

the slider. Repeat the above procedure moving the slider in smaller increments until a satisfactory S.W.R.

reading is obtained. Tighten all hardware. Disconnect the S. W.R. bridge and reconnect your coaxial cable.

SHOOTING STAR

REFLECTOR

(SEE FIG. 3B)

DRIVEN ELEMENTS

17’ - 5” ‘2

PL5 - BLACW

PLASTIC CA

GAMMA MATCHES -

(SEE FIG. 4)

DIRECTION

RADIATION

1st DIRECTORS

17’

‘2

2nd DIRECTORS I / / - -

16’ - 6” “2

PL2 - PLASTIC-CAP

(TYP. 12 PLACES)

SHOOTING STAR

Q sEET J

NOTES:

* 1. For details of boom assembly and mast mounting see figure 2.

*2. For details of element assembly and mounting see figure 3.

*3. Horizontal and vertical element spacing dimensions are

identical with l/4” gap between boom-to-element mounts.

SHOOTLNG STAR

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