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3 ELEMENT
10/11 Meter Maximum Beam
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MACO M103C
PACKING LIST
PART QTY O.D. SIZE LENGTH DESCRIPTION CHECKLIST
T59P 1 1-1/2” .050 72” ALUM TUBING SWAGED 1 END 6” ___
T28 1 1-1/2” .050
T11P 3 5/8” .050 72” ALUM TUBING SLTD BOTH ENDS ___
T04 2 ½” .050 80 ½” ALUM TUBING ___
T01 4 ½” .050 72” ALUM TUBING ___
P01P 1 ¼” x 5” 5” PLATE 1-1/2” BOOM TO 1-1/2” MAST ___
G01P 1 GAMMA MATCH
Z08P 2 GAMMA STRAPS F/COAX CONNECTS ___
S42 1 FEMALE COAX CONN W/MOUNTING ___
U02 7 1-1/2” PLATED U-BOLTS ___
S02 7 1-1/2” PLATED SADDLES ___
N03 14 5/16” LOCK NUTS ___
BE1P 3 1-1/2” BOOM TO ELEMENT MOUNT ___
W58P 6 5/8” EXTRUDED ALUM CLAMPS ___
S21 11 10-24 ½” MACHINE SCREWS ___
PL2 6 .437 PLASTIC CAP - BLACK ___
N11 11 10-24 SQUARE NUTS ___
Z02P 2 1/2” GAMMA STRAPS ___
N12 4 #10 LOCKWASHER ___
PL4 1 1-1/2” PLASTIC CAP - BLACK ___
PL4R 1 1-1/2” PLASTIC CAP – RED ___
1 INSTRUCTION SHEET ___
1 WARRANTY SHEET/SAFETY SHEET ___
1 TIP SHEET ___
Please note: In an effort to keep the price on Maco Anten nas dow n, we have decided not to clean up 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.
Revised 5/09
72” ALUM TUBING ___
HARDWARE BAG #1
HARDWARE BAG #2
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ASSEMBLY INSTRUCTIONS
FIGURE 1
This drawing shows a view of the antenna assembled. The
horizontally. These instructions and FIGURES 2 through 4 show the correct assembly instructions. It is
highly recommended that rope be put in the elements to prolong their life.
Upon completion of assembly, install the red plastic cap (PL4R) on the director end of the antenna,
and the blackplastic cap (PL4) on the reflector end. This will allow you to determine at a glance the direction
of transmit and receive.
FIGURE 2
To assemble the boom insert the swaged end of the l-1/2” O.D. boom section (T59P)
one end of the other l-1/2” O.D. boom section
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Center the boom-to-mast plate
bolts, saddles and hardware as shown in detail 2A.
This antenna is designed for mounting on a l-1/2” O.D. heavy duty mast. Mount using
U-bolts, saddles and hardware as shown in detail 2B.
GENERAL INSTRUCTIONS
may be used vertically or
BOOM ASSEMBLY AND MAST MOUNTING
inches into
The overall length of the boom should be about 11’
over the joint and clamp the boom sections together with the
CAUTION.....
Take care to avoid any contact with overhead power lines when raising your antenna.
Serious or fatal injury could result.
FIGURE 3
To assemble the elements, use (4) of the clamps (W58P) and
(S2 1
into each end of the element sections. Adjust each end to the
the overall length (“A” dimension). Push a 437” plastic cap (PL2) on each end of the elements.
fasten the boom-to-element clamp (BE
to Figure 1 for the spacing dimensions and fasten the driven element and reflector.
dimensions and make sure the elements are centered in the boom-to-element clamps. Tighten all hardware
taking care to line the elements up with the use of a level. Check your measurements and make sure the
elements are centered on the boom.
WEAKENS THE TUBING.
1) as shown in the element assembly detail. Insert a length of the l/2” O.D. unslotted tubing (TOlP)
Mount the elements onto the boom using U-bolts, saddles, and hardware (U02, S02, NO 1, N02) too
Line the elements up with the use of a level or any other workable method. Double check the spacing
TIGHTEN ALL HARDWARE SNUG; DO NOT CRUSH THE TUBING. CRUSHING GREATLY
ELEMENT ASSEMBLY AND MOUNTING
as shown in the element mounting detail. From the 72
to the outside edge of the mounting hardware and fasten the director.
x l/2” screw and square nuts
dimensions and tighten the clamps. Check
to center
Refer
2
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ASSEMBLY INSTRUCTIONS
(continued)
FIGURE 4 GAMMA MATCH MOUNTING
Mount the gamma match (GOlP) to the driven element, using the gamma straps
and
attaching hardware as shown. Attach your 52 ohm coaxial cable to the connector (S42) and dress along boom
and down the mast. The gamma is shown pointing down
this is to let water out.
ADJUSTING THE STANDING WAVE RATIO (SWR)
Refer to Figure 4. The dimensions given are approximate and should be used as a starting point. The
gamma match has 2 adjustments. First is the capacitor adjust and second is the slider adjust.
Connect a SWR
bridge coax between your transmitter and the antenna and check the SWR. If adjustment is required, loosen
the clamp on the gamma match and the screws holding the slider (gamma straps
capacitor adjustment first one direction, then the other until a minimum
Next move the
is obtained. If SWR
is not yet satisfactory, move the slider out 2” away from the boom. If the reading has gone up move the slider
back to the original position and then 2” towards the boom. Now readjust the capacitor for minimum SWR.
You shouldnow be able to determine which direction to move the slider. Repeat the aboveproceduremoving
the slider in smaller increments until a satisfactory SWR is obtained. Tighten all hardware. Disconnect the
SWR bridge and reconnect your coaxial cable.
NOTE!
When assembling for vertical use, set antenna on a pole about 8 to 9 feet above the ground
horizontally and adjust SWR for 1.7. When you turn the antenna vertical and mount it on the tower, etc.,
the SWR will drop to 1.5 or less . This is good; QUIT!
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‘4’
PLASTIC CAP
REFLECTOR’
PLASTIC CAP
PLASTIC CAP
DIRECTION
OF
RADIATION
GAMMA
(SEE FIG. 4)
DRIVEN
VERTICALLY POLARIZE1
DIRECTION
DRIVEN ELEMENT
GAMMA MATC
(SEE FIG. 4)
PLASTIC CAP
RED
HORIZONTALLY POLARIZED
GENERALASSEMBLY
4
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BOOM SECTION
BOOM SECTION PLATE
END)
CENTERED
U-BOLTS
DETAIL 2A
SADDLES,
&WASHERS (TYPICAL ,
(2) PLACES
NUTS
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U02, S02, NOI, N02,
U-BOLTS
SADDLES, 5/16” NUTS
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&WASHERS
WITH
BOOM-TO-MAST
PLATE ATTACHED
---- ----- ------
DETAIL
T28
BOOM SECTION
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CUSTOMER
O.D. MAST
BOOM SECTION
O.D. MAST
(DETAIL 2B)
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BOOM ASSEMBLY
MAST MOUNITNG
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(SLOTTED END)
(UNSLOTTED END)
Troubleshooting Tips
at the end
of this instruction booklet before
assembling elements.
ELEMENT ASSEMBLY DETAILS
ELEMENT MOUNTING DETAIL
TO1
NOTE! Assemble for the middle of the desired channels, that is 27.200 for
regular channel
as this is channel 20.
ELEMENT ASSEMBLY & MOUNTING
.
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THESE DIMENSONS ARE APPROXIMATE.
S.W.R TO DETERMINE EXACT
ARE2 SEPARATEGAh4MAADJUSTMENTS, l.CAPACI-
TOR ADJUSTMENT, 2. SLIDER POSITION.
DO NOT MOVE BOTH AT THE SAME TIME.
THE CAPACITOR FIRST, THEN, IF NECESSARY MOVE
THE SLIDER, AND GO BACK TO THE CAPACITOR.
S21,
LK. WSHRS
NUTS
GAMMA STRAPS
(SLIDER)
x
SCREWS
SQ.
THERE
MOVE
24 NUT\
STAR-e
WASHER
S21,
LK. WSHRS
WASHER
N12
SCREWS
SQ.
COAX.
CABLE
(CUSTOMER
FURNISHED)
GO1 P GAMMA MATCH
GAMMA MATCH MOUNTING
Mount the gamma match (GO
attaching hardware as shown. Attach your 52 ohm coaxial cable to the connector (S42) and dress along boom
and down the mast. The gamma is shown pointing down
ADJUSTING THE STANDING WAVE RATIO (SWR)
Refer to Figure 4. The dimensions given are approximate and should be used as a starting point.*
The gamma match has 2 adjustments. First is the capacitor adjust and second is the slider adjust. Connect
a SWR bridge coax between your transmitter and the antenna and check the SWR.
loosen the clamp on the gamma match and the screws holding the slider (gamma straps
the capacitor adjustment first one direction, then the otheruntil
is not yet satisfactory, move the slider out 2” away from the boom. If the reading has gone up move the slider
back to the original position and then 2” towards the boom. Now readjust the capacitor for minimum SWR.
You shouldnow be able to determine which direction to move the slider. Repeat the above procedure moving
the slider in smaller increments until a satisfactory SWR is obtained. Tighten all hardware. Disconnect the
SWR bridge and reconnect your coaxial cable.
to the driven element, using the gamma straps (202P,
this is to let water out.
If adjustment is required,
is obtained. If SWR
and
Next move
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