WADE Antenna, Inc. PB-81 Manual de usuario

Printed in Canada Page 1

The PB-81 Parabeam UHF parabolic screen reflector antenna is of modular design for use

singly or in dual arrays and offers very high gain with extremely low windloading. It is supplied with

the necessary installation hardware. Output terminal is a 75-ohm threaded “F” type fitting.

Model : PB-81 Instruction Sheet

PB-81 screen reflectors are shipped in two sections and must be assembled prior to mounting

the feed assembly. The entire antenna assembly is then raised into position, oriented and secured

to the mast or tower leg as shown in Figure 1 and overview drawing on page 4.

Overview

Materials and tools required

Mechanical Specifications

MODEL REFLECTOR DIMENSIONS(IN.) THRUST**

SIZE(FT) QTY WIDTH HEIGHT DEPTH* NOICE 1/4” ICE NET SHIPPING

PB-81 8.0 1 99.5 96.5 18.0 389 805 100 155

WEIGHT

*Depth for reflector only

**Thrust in pounds transferred to supporting structure at 30 PSF

1. An appropriate 75-ohm downlead equipped with a 75-ohm female “F” type connector and a

weatherboot.

2. Weatherproofing compound.

3. A ratchet wrench with 7/16 and 9/16 inch sockets.

4. A 7/16 open-end wrench

Instruction Sheet

30569-002 Rev. E

09/04/08

Please Note: A qualified structural engineer

should be consulted prior to mounting an

antenna on a tower or support structure.

Figure 1

Delhi Antenna Products Division

 4 - Bolts, 1/2” - 13 x1-1/2”

Hex Head

 4- Nut, 1/2”-13 GR. 2 HEX

 4- Lockwashers, 1/2” split

 4 - Nuts, 3/8 - 16 Hex

 4 - Lockwashers, 3/8” Split

 4 - Washers, 3/8” Flat

 2 - U-bolts, 3/8 Inch

 2 - U-bolts, 5/16 Inch

 4- Nuts, 5/16 Hex

 4 - Lockwashers, 5/16” Split

 4 - Reinforcing Channel

 2 - Mast Clamps

Printed in Canada

Swing the frame open,

assemble it using 3/8 - 16 x 1-

1/2 hex head bolts and mount it

to the PB-81 screen frame using

the supplied U-bolts, mast

clamps and reinforcing clips as

shown in Figure 3 and overview

drawing on page 4.

Open hardware package #1. This should consist of a minimum of:

Screen Assembly

Use this hardware to

assemble antenna halves

as shown in Figure 2.

Refer to detail at right.

Figure 2

 8 - Bolts, 1/4 - 20 x 3 1/2” Hex

Head

 8 - Nuts, 1/4 - 20 Hex

 8 - Lockwashers, 1/4” Split

 16 - Reinforcing Channels

Locate the outrigger frame and hardware package #2. This should consist of a minimum of:

Outrigger Assembly

Frame Array

Figure 3

Page 2

Printed in Canada

Attach the feed to the center of the screen using the 1/4 - 20 x 3 1/2” bolts, flat washers,

lockwashers and nuts as shown in Figure 4 and Detail B. Proceed by attaching the feed

tube to upright vertical member of the outrigger frame using the 5/16” U-Bolt,

lockwashers, nuts, reinforcing channel and mast clamp as shown in Figure 1 and

overview drawing on page 4. Note that the output connector must be installed in the

“up” position and that the feed must be aligned straight out from the screen,

perpendicular to the frame. Connect the down-lead fitting to the antenna output terminal.

Hand tighten, then wrench tighten the fitting not more than 1/6 of a turn. Apply a liberal

coating of weatherproofing compound to the connection and slide on the weatherboot.

Locate driver and hardware package #3. This should consist of a minimum of:

 2 - Bolt, 1/4 - 20 x 3

1/2” Hex Head

 2 - Nut, 1/4 - 20 Hex

 2 - Lockwasher, 1/4”

Split

 2 - Washer, 1/4 Flat

 1 - U-Bolt, 5/16 x 2”

I.D.

 2 - Nut, 5/16 Hex

 2 - Lockwasher,

5/16” Split

 2 - Reinforcing

Channel

 1 - Mast Clamp

Feed Assembly

Page 3

Figure 4

Figure 4, A

Figure 4, B

Figure 4, C

1) Carefully lift the antenna

assembly into position on the

tower or mast, roughly aligned to

the direction of the desired

broadcasting stations.

Temporarily secure the unit as

shown at right and tightening

them sufficiently to bear the

weight of the antenna.

Caution! Take care not to damage

the feed assembly or move it out of

alignment with the center of the

reflector.

 4 - Bolts, 1/4-20 x 3/4”

 4– Nuts, 1/4-20 x 3/4”

 2 - U-Bolts, 3/8-16

 4 - Washers, 3/8 Flat

 4 - Lockwashers, 3/8 Split

 4 - Nuts, 3/8 Hex

Locate hardware package #4. This should

consist of a minimum of:

Antenna Mounting

Page 4

Overview Drawing

Printed in Canada

2) Assemble the twist-lock azimuth

braces onto the reflector frame following

steps 1,2 & 3 at right by aligning open

portion of end bracket with antenna

frame, sliding bracket over antenna frame

and turning 1/4 turn counterclockwise to

lock bracket on frame.

3) Locate azimuth brace mount (Figure

5), The 3/8 U-bolts supplied are

adaptable to range of appropriate tower

leg sizes. mount to tower leg as in Figure

1 and overview drawing on page 4.

Rotate the entire antenna slightly, both

left and right, until maximum signal

strength is received. This is obtained by

sliding the azimuth braces in their

attachment hardware (Figure 5). Two (2)

1/4-20 x 3/4” bolts are used to lock the

azimuth brace in place, and two (2) 1/4-

20 nuts are used as lock nuts to lock the

bolts (not shown in picture). When

alignment is When alignment is

satisfactory, tighten all bolts and U-bolts

securely.

4) Connect the down-lead fitting to the

antenna output terminal. Hand tighten,

then wrench tighten the fitting not more

than 1/6 of a turn. Apply a liberal coating

of weatherproofing compound to the

connection and slide the weatherboot on.

Utilize the remaining zip ties to secure

STEP 1

STEP 3

STEP 2

Figure 5

Page 5

1.N

2.D

2.C

Antenna Mounting - continued

Ontario, CANADA

www.wade-antenna.com

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