Hy-Gain LP-1009A Bedienungsanleitung

LP-1009A / LP-1009AN

Log Periodic Antenna

Instruction Manual

TABLE OF CONTENTS

Page CHAPTER 1

General Information .............................................................…………...........................................1-1

General Description ........................................................................................................................1-1

Theory of Operation........................................................................................................................1-2

Preparation for Assembly................................................................................................................ l-2

Installation Planning .......................................................................................................................1-3

Corrosion Precautions..................................................................................................................... l-3

Assembly of the Element-to-Boom Brackets on the Boom............................................................ l-5

Instalation of Tubing Clamps on Elements..................................................................................... l-6

Element Assembly ..........................................................................................................................1-8

Feedline Assembly.......................................................................................................................... l-9

Beta Tube Assembly .....................................................................................................................1-12

Installing Elements on the Boom..................................................................................................1-15

Balun Assembly............................................................................................................................1-15

Boom Support Assembly..............................................................................................................1-16

Final Inspection.............................................................................................................................1-17

CHAPTER 2

Antenna Installation.................………………....................................................................................... 2-1

Installation on a Crank-Up Tower............….................................................................................. 2-1

Installation on Guyed Towers........................................................................................................ 2-1

Attachment of Coaxial Feedline.................................................................................................... 2-1

Attaching the Antenna to the Mast................................................................................................ 2-2

Lightning Protection ...................................................................................................................... 2-2

VSWR Curves................................................................................................................................ 2-3

Operation........................................................................................................................................ 2-4

VSWR Record ............................................................................................................................... 2-4

Troubleshootin

............................................................................................................................ 2-5

LIST OF ILLUSTRATIONS

FigurePage

1 Boom-to-Mast Bracket................................................................................................ l-4

2 Boom Assembly.......................................................................................................... l-5

3 Element Location .......................................................................................................1-6

4 Element-to-Boom Bracket.......................................................................................... l-6

5 Element Tubing Clamps.............................................................................................. l-7

6 Rope Dampening .......................................................................................................1-8

7 Element Tubing Descriptions...................................................................................... l-9

8A Exposed Tubing Lengths, LP-1009, American........................................................1-10

8B Exposed Tubing Lengths, LP-1009, Metric.............................................................1-11

9 Feedline Assembly, Front Section ...........................................................................1-12

10 Feedline Assembly, Middle Sections.......................................................................1-13

11 Feedline Assembly, Rear Section ..............................................................................1-14

12 Installing Elements on the Boom...............................................................................1-15

13 Boom Support Cable Assembly.................................................................................1-16

CHAPTER 1

General Information

General Descri

tion

The LP-1009 log-periodic antenna is a medium

gain unidirectional antenna with an instantaneous

bandwidth of 13 to 30 MHz under 2:1 VSWR.

The LP-1009 also covers the 10,12,15,17 and 20

meter Amateur bands. It is supplied with the new

HyGain BN-4000 high power balun which allows

the antenna to handle 2000 watts continuous-duty

and 4000 watts PEP on all modes.

All-stainless steel hardware and clamps are used

on all electrical and mechanical connections of

the LP-1009. The LP-1009 may be rotated with

HyGain's T2X or HDR-300 rotators, and may be

installed on any tower rated for at least 12.5 square

feet wind load.

Theory of Operation Preparation for Assembly

The design of the LP-1009 is based on a 12

element log-periodic dipole array with a 'TAU'

of 0.896 and a'SIGMA' of 0.05. These

parameters give the LPDA a gain of

approximately 7.2 dBi, a front-toback ratio of

approximately 17 dB, and maximum VSWR of

1.8:1. The mechanical design of each element

was optimized by computer analysis to provide

minimum weight and wind area yet survive wind

speeds of at least 100 mph (165 kph).

The United States uses American units of

measurement. Please see page 2-8 of this manual

for American-to-metric conversion information.

Most illustrations in this manual contain both

American and metric dimensions.

When unpacking your antenna, check inside of all

tubing for smaller diameter tubes and other small

parts. To conserve space, these smaller parts are

sometimes packed inside larger pieces. Check all

parts against the parts list to ensure no parts are

missing. The hardware supplied with this antenna

is ba

ed b

thread size for

our convenience.

You may want to sort the aluminum tubing for

the elements before assembly. This makes

element assembly much easier. The following

table shows the various element tubing sizes and

quantities.

TUBING SIZE QUANTITY SUPPLIED

1 1/4" x 64 3/4" with insert 2

1 1/4" x 59" with insert 2

1 1/4" x 37 3/4" with insert 2

1 1/4" x 20 1/2" 2

1 1/4" x 17" 2

1 1/4" x 15" 6

1 1/8" x 42" 2

1 1/8" x 36" 4

1 1/8" x 317/8" 4

1 1/8" x 17" 6

7/8" x 55" 4

7/8" x 51 " 4

7/8" x 46" 4

7/8" x 34" 4

7/8" x 24" 4

7/8" x 15" 4

5/8" x 28" 2

5/8" x 24" 20

5/8"x 16" 2

7/16" x 58" 2

7/16" x 55" 6

TABLE 1

Choose a large, clear area to assemble your

antenna. The area must be at least 28' x 38' (8.5

m x 11.6 m). You may wish to use a temporary

mast with sawhorses to support the boom during

assembly. A concrete driveway or parking area is

an excellent area for assembly. If you assemble

this antenna over a grassy area, precautions

should be taken so that hardware is not

accidentally lost during assembly. We have

included some extra small parts with this

roduct

ust in case some are lost.

All tubing supplied with the LP-1009 antenna

telescopes together. Make all measurements to

the given dimensions, plus or minus no more

than 1/8 inch

(

3 mm

)

TOOLS: The following tools are required for

eas

assembl

We suggest that the assembly of this product be

done over at least a 2 day period. We further

suggest that you read this manual thoroughly, in

its entirety, and then go through the manual a

second time and identify and familiarize yourself

with all of the antenna components. Start

assembling the antenna when you are prepared.

A few extra minutes invested in the assembly

process will ensure many years of satisfaction

with this antenna.

NOTE: An extra page that contains Figures 8A

and 8B, Element Assembly, has been inserted in

this manual for use when assembling the

elements.

Installation

The Hy-Gain LP-1009 Log-Periodic Antenna re-

quires a supporting tower structure which is at

least 50' (15.2 m) in height above ground level

and which will support at least 12.5 sq. ft. (1.1

sq. m) wind surface area. A support mast is not

supplied with this antenna. Mast height will vary

according to installation. A standard 10 foot mast

will suffice in most cases. This antenna may also

be installed atop buildings or other structures. In

these cases, the antenna should be at least 10' (3

m) above a peaked roof and at least 20' (6.1 m)

above a large flat roof. Performance may be

degraded at less than these heights, depending

upon the amount of metal in the roof and/or attic.

Other nearby antenna structures, power lines,

and guy wires may also affect the performance

of this antenna.

The LP-1009 also requires a suitable rotator, if

not installed in a fixed azimuth. Suitable rotators

include H

-Gain models T2X and HDR- 300.

Corrosion Precautions

The LP-1009 antenna is designed to be relatively

maintenance free for most environments. All

hardware is made of passivated stainless steel,

typically grade 304. The internal tooth-type

lockwashers used in this antenna are grade 410

stainless steel, and are slightly magnetic. The

element tubing clamps are grade 304 stainless

steel. The set of boom support clamps is hot

dipped galvanized steel. Most other metallic

parts are aluminum. All insulators exposed to

sunlight are made from U.V. resistant black

polyethylene or black Cycloac.

We have supplied a 3 oz. tube of Penetrox-ATM

from Burndy Corporation for use as an anti-

oxidant within element tubing assemblies. This

prevents aluminum oxide from forming on the

aluminum surfaces, especially in coastal

environments.

Before assembling the tubing sections, abrade

the mating surfaces with a wire brush or

sandpaper. Apply the anti-oxidant to both

surfaces, then assemble joint. Wipe off any

excess material.

A light amount of clear lacquer or an acrylic

spray may be used to coat the exterior surface of

the element assemblies if this antenna is to be

installed near a sea coast. Tighten all joints

securely before coating! Also, if installed near a

sea coast, the solder lugs on the pigtail wire

assemblies should not touch the aluminum tubing

or clamp directly. Each solder lug should be

between 2 stainless steel flatwashers. Tighten

these connections securely and competely coat

with Scotchkote or RTV.

NOTE: Only use alcohol-based RTV (non-cor-

rosive). The acid-based RTV (which releases

acetic acid and smells like vinegar) will corrode

metal.

If a UHF connector (PL-259) is used with the

BN-4000 balun, seal the connector with Coax-

Seal (TM) or black electrical tape for rain

protection. Type N connectors are designed to be

weatherresistant if ti

htened securel

Select the boom-to-mast bracket and clamp parts.

Loosely assemble them on the boom ends as

shown in Figure 1.

Secure the boom ends and brackets together with

four (4) 1/4"-20 x 3/4" bolts, lockwashers and

nuts (70, 75, 76), and two (2) 5/16"-18 x 2 3/4"

bolts, lockwashers and nuts (80, 82, 83 ). Tighten

these six bolts securely. The casting-to-boom

bracket (7), may deform slightly when the four

1/4" bolts are ti

htened. This is normal.

Assemble the two cast aluminum brackets (1) on

your temporary mast at about 4 feet (1.2 m)

above ground. A seven foot length of 2" ABS or

PVC plastic drain pipe makes an inexpensive

temporary mast. Secure the two brackets together

using the two (2) 5/16"-18 x 3" bolts,

lockwashers and nuts (78, 82, 83). Tighten these

two bolts evenly until the brackets are snug.

Attach the boom and bracket assembly to these

two brackets using the four (4) 5/16"-18 x 5"

bolts, lockwashers and nuts (77, 82, 83). If you

have problems aligning all of the holes in the

brackets, you may wish to carefully run a 5/16"

drill bit through these holes. Do not enlarge

these holes beyond 5/16" or you may weaken the

brackets. This will prevent alignment problems

that might occur on the top of your tower!

Tighten these four bolts just enough to hold the

wei

ht of the antenna.

Slip the remaining boom sections over the

swaged ends of the assembled boom and secure

as shown in Figure 2.

Assembly of the Element-to-Boom

Brackets on the Boom

There are two sizes of element-to-boom brackets

supplied with the LP- 1009 antenna. The largest

has a 1 1/2" I.D., and is used on the 8 longest

elements and the boom support tubes. The

remaining brackets have a 11/4" I.D., and are

used on the 4 front elements.

The largest brackets are stamped with the

number 14, while the smaller brackets are

stamped with the number 13.

Assemble the brackets as shown in Figure 4 and

locate them on the boom assembly as shown in

Figure 3. It is easier to assemble the brackets on

the boom at the correct location, rather than try

to slide them on the boom. If you are going to

leave this assembly unattended for more than 15

minutes, we suggest that you tighten the eight

(8) bolts on each bracket, so that they do not

vibrate off. Do not tighten the anchor bolt on the

bottom of the brackets until the elements are

installed and aligned. Install the boom support

tubes (17) and brackets (2) also at this time! The

boom support brackets will have both top and

bottom anchor bolts.

NOTE: The longest element (#12) uses top AND

bottom anchor bolts! All other elements use only

bottom anchor bolts!

You may want to mark the bracket location on the

boom with an indelible marker. You can quickly

realign the brackets to these marks when you

install the elements in a later ste

Installation of Tubing Clamps

on Elements

Select the proper size tubing clamps as shown in

Figure 5. When installing the clamps, place the

clamp near the tube end with the top of the clamp

over the slot in the tube as shown in Figure 5.

After adjustment of the tubing lengths, tighten the

clamp with a 5116 inch nut driver, socket or open

end wrench until the tubing will not twist or tele-

scope. DO NOT overtighten! Also, if you loosen

and re-tighten a clamp more than 5 times, we

suggest that you replace the clamp. After repeated

tightenings, these clamps may become difficult to

completely tighten. Should you need to replace

these clamps, use only high quality stainless steel

clamps to ensure proper torque.

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