maco_V58.pdf

ASSEMBLY INSTRUCTIONS

5/S WAVE COMMERCIAL GROUND

PLANE WITH RADIALS

V58

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

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

MAC0 ALPHA V58

PARTS LIST

NOTICE: ALL PARTS ARE MADE OF AIRCRAFT GRADE 6063 T-5 MATERIAL

PART OTY

T47P 4

T43P 1

T18P 1

T15P 1

TO1 5

R03P 1

BAlP 1

ROIP

O.D. SIZE LENGTH

DESCRIPTION

CHECKLIST

98” .047”

36”

Alum. Tubing slotted both ends

7/S” .047”

48”

Alum. Tubing slotted one end

314” .047”

48”

Alum. Tubing slotted one end

518” .047”

48”

Alum. Tubing slotted one end

l/2” .047”

72”

Alum. Tubing

Cast Alum. Spider

Base Assembly

3,‘s” .035”

17-7/S” Hoop Rings

POSP 1

R02P 1

co1 1

W58 9

w34 1

W78 I

C13P 1

WlOP 2

s21

HARDWARE BAG

5 l/2” Bracket WI SO239 connector w/ wire

1/2x1/8” 7 3/4” Alum. Strap

318”

Stainless Steel Hose Clamp

518”

Extruded Alum. Clamp

314”

Stainless Steel Hose Clamp

7/8”

Extruded Alum. Clamp

I .845”

Clamp Ring

Stainless Steel Hose Clamp

1 o-2-l 11’2”

Machine Screws

s45

IO-24

”

Machine Screw

s24

51 I 6”

2”

Hex Bolts

Nil

IO-24

1”

Square Nuts

NO1

5/l 6”

Hex Nuts

N26

#lO

Flat Washers

N12

#lO

Lockwashers

PL2

.437”

Plastic Cap - Black

NO2

51 I 6”

.Lockwasher

Set of Instructions

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

PLEASE NOTE: In an rffotl IO keep the pnce on h4aco Antennas down. we have decided not to clean up all the burrs and rough

edges on the parts We rrcomntrnd IIKII you deburr atid clean up each part with files. sandpaper. etc. so that they go together

easily. We are aware 1111s needs to be done. but ha\ e elected not to do it to save you the money we would have to add to the

price of the kit for this service

V5/8

MAC0 ALPHA V58

26 - 33 MHZ Base Station Antenna

ASSEMBLY INSTRUCTION

FlGURE 1 BASE ASSEMBLY

Install the PO8P Bracket to the base assembly BAlP with #lo-24 x 1 7/8 hardware S45, Nil, N12

(ref. Detail 1A). It should make a 90 degree angle with the base assembly. If not, bend the PO8P until it

does.

Fasten one end of the strap R02P (ref. Detail 1C) to the vertical end of the base section using the

stainless steel worm drive clamp supplied. Tighten snugly but not too tight as this may have to be adjusted.

Next join the two hoop rings together (ref. Detail 1D) using #lo-24 x l/2” hardware S21, N26, Nil,

N12.

Now fasten one end of the hoop ring RO 1 P to bracket PO8P (ref. Detail 1E) and the other end to strap

R02P using IO-24 x l/2” hardware S21, N26, Nil, N12.

Position the aluminum clamp CO 1 on the hoop ring assembly approximately where shown (ref. Detail

1 F) and attach the wire as shown using # 1 O-24 hardware S 11, N26, Nl 1, N12; do not tighten. Now measure

from the center of the screw (ref. Detail 1D) around the outside of the ring 6 l/4” toward the PO8P end of

the hoop ring assembly until the edge of the clamp CO 1 is against the mark; tighten snugly. Now make the

final adjustment of R02P so that the distance between the ends of the rings is 1”. This is a vertical separation

of 1”. (Ignore the screws in this measurement) and tighten the clamp firmly.

FIGURE 2 BASE ASSEMBLY

To install the vertical elements, # T43P, T18P, TISP, use a felt tip marker and ruler, andmark 6” from

the unslotted end. Mark the TO 1 P 4” from one end. Now using the clamps and hardware as shown (ref. Detail

2A) slide the unslotted ends into the larger sections to the mark and tighten clamps. Install the plastic cap

PL2 on the top. THE OVERALL LENGTH MUST BE SELECTED FROM THE FREQUENCY CHART

ONTHE NEXT PAGE AND ADJUSTED TO THIS MEASUREMENT. Shorten at top Clamp WlOP. This

is important to assure low SWR; however, the chart length is not sacred and may be changed to allow for

objects close enough to the antenna to cause the SWR to be affected. For frequencies falling between those

shown on the chart, it is suggested that interpolation be used to get the starting point for adjusting. Note:

The bottom means the very bottom!

To install the radials, first put the aluminum bracket R03P spider on the base section BAlP as shown

in Detail 2B. Install the 5/l 6 x 1 hex bolt,, nut, and washer in the bracket. The bracket is positioned so that

there is l/2” clearance between the top of the spider and the bottom of the bracket PO8P. This position puts

the top edge of the R03P spider just where the base section stops tapering and gets back to full size. Now

tighten the bolt and lock nut. Next take the four T47P radials and the four clamps W58 with #lo-24 x l/

2 screws, hardware S21, Nl 1; and place the clamps with hardware installed over the end of the tubing up

on a bracket stub and tighten. Now repeat with the other three radials.

Next take the four TO1 P radials and using a marking pen, mark 4” from the end on all four radials.

Now using clamps W58 and #l O-24 x l/2 screws with hardware Sl 1 and Nl 1; insert the marked end to the

mark and tighten the clamps (ref. Detail 2C). Install the four Black

Plastic Caps PL2 on the ends. Exact length is not critical.

MAC0 MANUFACTURING, 4091 VISCOUNTAVE., MEMPHIS, TN 38118

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

V5/8

ASSEMBLY INSTRUCTIONS

(continued)

The C 13P clamp is round when received. It must be made egg shaped enough to allow the nut NO 1

to go between the clamp C13P and the BAlP base assembly.

The base section can be mounted two ways:

On a mast with an outside diameter of up to 1 3/S”, first position clamp ring C13P on the base and

install the 5/l 6 x 1” hex bolt and nut S24, NO 1 as shown. Turn the bolt down firmly onto the mast (ref. 2D).

On a mast with an inside diameter from 1 l/2” to 1 3/4”, first position the clamp ring C13P with the

5/l 6 x 1” bolt and nut, S24, NO 1, as shown, over the base. Slide the base into your mast about 6” and tighten

the bolt down onto the base.

ADJUSTING THE STANDING WAVE RATIO (SWR)

There are only two possible adjustments to change from those in the instructions. One is the position

of the clamp CO1 on the ring. It is recommended that if the SWRis about the same on both ends of the band,

this adjustment be left alone. Adjust only to try to get the same SWR at both ends of bond covered.

The other adjustment is the length of the antenna. This should be changed at the top of the base

section. Loosen clamp WlOP and adjust. It is recommended that you work in l/4” increments so as to tell

if you are going in the right direction.

REMEMBER THIS ANTENNA REACTS TO EVERYTHING IT CAN SEE; THIS MEANS

THAT TREES, POWER LINES, BUILDINGS, AND OTHER ANTENNAS AT THE SAME HEIGHT

WILL AFFECT THE SWR.

FREOUENCY TO LENGTH CHART for V58 26-33 Mhz Antenna

THIS CHART MUST BE USED TO SELECT THE OVERALL LENGTH FOR THE ANTENNA.

FF=Q

Mhz

OVERALL

LENGTH

NOTE:

These measurements are for the overall length of

the antenna. This means the top is where the plastic

cap goes and the bottom is below the hole for the

mounting bracket C13P.

26.0

248”

27.0

240”

28.0

232 518”

29.0

225 314”

30.0

215 l/4”

IF THIS ADJUSTMENT IS NOT MADE

THE ANTENNA WILL NOT WORK

CORRECTLY!

31.0

209 l/8”

32.0

203 112”

33.0

198 l/4”

NOTE: To use at other frequencies25-50 mhz, change the length.

R03P

STRAP

I 1 I I

----w--w--- ----

BASE ASSY.

a--- -- --

II I I

I I I I

I I

PO8P BRACKET

I I

S45, N12, Nll

#l O-24 x 2” SCREW

LK. WSR. & SQ. NUT

DETAIL 1C

I I

------_ ----

-----v--w--

DETAIL IA

------m

1 S21,, N26, NIZ,

1 Nl 1, #I O-24 x l/2”

BASE

ASSEMBLY

HOOP RINGS

. 1,

--a--

---------*

--- ---- DETAIL 1D

,R02P

NOTE: Wire is soldered

to connector, SO239W

RING 3 Nl I, #IO-24 x l/2”

SCREW, FLT. WSR.

LK. WSR., & I

SQ. NUT

ROI P

; HOOP RING

Nll, N12, N2E

#IO-24 x SQ.

NUT, LK. WSF

RING,

& FLT. WSR.

DETAIL 1E

;

---a---- ----w

I DETAIL 1F

------ ------w--

V5/8

ALPHA V58

FIGURE 1

HOOP

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