M1
04C
4 ELEMENT
10/11 METER MAXIMUM BEAM
www.
macoant
ennas
.
net
MACO M104C
PACKING LIST
PART
QTY
SIZE
LENGTH
T41P
T51P
T01
T05P
T11P
T58P
P02P
G01P
S42
Z08P
1
2
6
2
4
2
1
1
1
2
2”x.060
2”x.060
½”x.050
½”x.050
5/8”x.050
3/8”x.050
1/4”x5”
72”
72”
72”
80.5”
72”
11 7/8”
5”
DESCRIPTION
CHECKLIST
ALUMINUM TUBING SWAGED BOTH ENDS
ALUMINUM TUBING SLOTTED ONE END
ALUMINUM TUBING
ALUMINUM TUBING SLOTTED ONE END
ALUMINUM TUBING SLOTTED BOTH ENDS
ALUMINUM TUBING
PLATE 2” BOOM TO 2” MAST
GAMMA MATCH
COAX CONNECTOR W/MOUNTING NUT
GAMMA STRAPS WITH F/COAX CONNECTOR
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____
____
____
____
____
____
____
____
____
HARDWARE BAG #1
U01
S01
N03
10
10
20
2”
2”
5/16”
PLATED U-BOLTS
PLATED SADDLES
LOCK NUTS
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____
____
HARDWARE BAG #2
BE2P
C02
W58
N11
N12
PL1
PL2
PL5
PL5R
S21
Z02P
4
2
8
13
4
2
6
1
1
13
2
1
1
1
2”
½”
10-24
#10
3/8”
.437
2”
2”
10-24x1/2”
BOOM TO ELEMENT MOUNTS
METAL CLAMPS
EXTRUDED ALUMINUM CLAMPS
SQUARE NUTS
LOCK WASHERS
PLASTIC CAPS – BLACK
PLASTIC CAPS – BLACK
PLASTIC CAPS – BLACK
PLASTIC CAP – RED
MACHINE SCREWS
GAMMA STRAPS
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TIP SHEET
WARRANTY SHEET
SET OF INSTRUCTIONS
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____
____
Please note: In an effort to keep the price on Maco Antennas down, 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
MAC0 M 104C
ASSEMBLY INSTRUCTIONS
FIGURE 1
GENERAL INSTRUCTIONS
This drawing shows a view of the antenna assembled. The M104C may be used vertically (Figure
1 A) or horizontally (Figure 1 B). 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. All Hardware
should be tightened securely, and then coated with silicon rubber sealant or a similar compound to prevent
loosening from wind vibration.
Upon completion of assembly, install the red plastic cap (PL4R) on the director end of the antenna,
and the black plastic cap (PL4) on the reflector end. This will allow you to determine at a glance the direction
of transmit and receive.
CAUTION.....
Take care to avoid any contact with overhead power lines when raising your antenna.
Serious or fatal injury could result.
FIGURE 2
BOOM ASSEMBLY AND MAST MOUNTING
To assemble the boom, slide the slotted ends of the boom sections (T5 1 P) onto both swaged ends
of the center boom section (T4 1 P). The overall length should be about 17 feet. Next center the boom-tomast plate (PO2P) and mount using 2” U-bolts, saddles and hardware as shown in detail 2B.
Thisantennaisdesignedformountingona2” O.D. heavydutymast. Mountusing2”U-bolts, saddles
and hardware as shown in detail 2C.
FIGURE 3
ELEMENT ASSEMBLY AND MOUNTING
To assemble the elements, use (4) of the clamps (W58P) and #IO x l/2” screw and square nuts
(S2 1 ,N 1 I ) as shown in the element assembly detail. Insert a length ofthe l/2” O.D. unslotted tubing (TOlP)
into each end of the element sections. Adjust each end to the”B” dimensions and tighten the clamps. Check
the overall length (“A” dimension). Push a 437” plastic cap (PL2) on each end of the elements.
Mount the elements onto the boom using U-bolts, saddles, and hardware (UO 1, S02, NOl, N02) too
fasten the boom-to-element clamp (BE 1 P) as shown in the element mounting detail. From the director end
of the boom, measure in 5/8” to the outside edge of the mounting hardware and fasten the director. Refer
to Figure 1 for the spacing dimensions and fasten the driven element and reflector. Start at about 4” from
the end to center the elements on the boom.
Line the elements up with the use of a level or any other workable method. Double check the spacing
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.
TIGHTENALLHARDWARESNUG;DONOTCRUSHTHETUBING.
WEAKENS THE TUBING.
M104C
CRUSHINGGREATLY
2
ASSEMBLY INSTRUCTIONS
(continued)
FIGURE 4
GAMMA MATCH MOUNTING
Mount the gamma match (GOlP) to the driven element, using the gamma straps (ZO2P, ZO8P) 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 (ZO2P)). Next move the
capacitor adjustment frlrst one direction, then the other until a minimum SWR reading 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 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 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 1.6 to 1.7 When you turn the antenna vertical and mount it on the tower,
etc., the SWR will drop to 1.4 to 1.5 This is good; QUIT!
M104C
63 3/W
t--r
BLACK PLASTIC
CAP (PL5)
\
. . RED PLASTIC
CAP (PL5R)
DIRECTION
OF
RADIATION
/’
R E F L E C T O R -’
/’
DRIVEN ELEMENT’
GAMMA MATCH
2” O.D. MAST
(CUSTOMER FURNISHED)
FIRST DIRECTOR /
SECONdDIRECTOR
VERTICAL POLARIZATION
BLACK PLASTF
CAP (PL5)
RE
DRIVEN
DIRECTION
ELEMENT’
GAMMA MA
RED
2” O.D. MAST
(CUSTOMER FURNISHED)
PLASTIC
SECOND DIRECTOR
HORIZONTAL POLARIZATION
GENERAL ASSEMBLY
M104C
@ED
Ml04C
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__------ ---- --~-~~~-------_--:
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T51P
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T41P CENTER
BOOM SECTION ,
(SWAGED END)
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PLATE
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BOOM /
; CENTER
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bO1, Sol, NOI, NO2
2” U-BOLTS & SADbLEd
5116” NUTS 8 WASHER:
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(2) PLACES
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TSIP
MAST MOUNTING
DETAIL 2C
~~APPROXIMATELY 17’
/-------
------
----------
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U02, S02. NO1 NO2
2” U-BOLTS & SADDLES
5116” NUTS & W A S H E R S
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BOOM CENTER
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BOOM ASSEMBLY
& MAST MOUNTING
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BOOM-TO-MAST
PLATE ATTACHED
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M104C
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ELEMENT ASSEMBLY f
& MOUNTING
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DIMENSIONS
ELEMENT
2ND DIRECTOR
REFLECTOR
188 l/2” 58 l/4”
216 314” 65 l/2”
6 718”
Please read the Assembly and Troubleshooting Tips at the
end of this instruction booklet before assembling elements.
-----~----~-~-----------_---___
-----__
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MACHINE SCREW (S21)
METAL CLAMP (CO2)
SQUARE NUT (Nil)
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2’ SADDLE (SOI)
BOOM-TO-ELEMENT
MOUNT fBE2P)
LOCKWASHERS IN02)
H E X NUT(N01) .
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6
* NOTE: THESE DIMENSONS ARE APPROXIMATE.
REFERTO THEINSTRUCTIONS ON ADJUSTINNG THE
S.W.R TO DETERMINE EXACT SETTINGS. THERE
ARE2 SEPARATEGAMMA ADJUSTMENTS, 1. CAPACITOR ADJUSTMENT, 2. SLIDER POSITION.
DO NOT MOVE BOTH AT THE SAME TIME. MOVE
THE CAPACITOR FIRST, THEN, IF NECESSARY MOVE
THE SLIDER, AND GO BACK TO THE CAPACITOR
S 2 1 , Nil, N127
*IO-24 x 112” S C R E W S
K . W S H R S 8, S Q . \
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DRIVEN
- ELEMENT
S 2 1 , Nil, N12
#lo-24 x 112” S C R E W S
EF”,“,: & SQ.
3/8” 24 N U T
-.
318 STAR-.- (
WASHER
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ZO2P
GAMMA STRAPS
(SLIDER)
COAX.
CABLE
(CUSTOMER
FURNISHED)
318 P L A S T I C S H O U L D E R
WASHER
31%
FLATWASHER
- GO1 P GAMMA MATCH
GAMMA MATCH MOUNTING
@!i@
Ml04C
Mount the gamma match (GOlP) to the driven element, using the gamma straps (202P, 208P) 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 (SWRl
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 (ZO2P)). Next move
the capacitor adjustment first one direction, then the other until aminimum SWRreading 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.
7
M104C
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