Diamond Antenna W-735 Operation Instruction - Page 2

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Diamond Antenna W-735 Operation Instruction

Assembly

The antennas are assembled as shown per figures.

1. Turn wire element approximately 20cm (7.9") through balun and

bind two parts by binding wire as shown per Fig.1. In case of the W-

8010, two wire elements for one side are bound together.

Note:

Cut binding wire for approximately 10cm (3.9") each to bind.

2. To install a trap, turn a wire element approximately 15-16cm (5.9"-

6.3") and then hook the element to wire holder section of the trap and

turn crimped terminal side of the element four times around the other

side of the element. Put crimped terminal through wire holder and fix

with nut and spring washer. (each adjustment element is to be set at

balun side of each trap.)

3. To install a insulator, put a element approximately 55cm (21.7")

through the insulator and tie the element once as shown per

Fig.3. Then bind the element with binding wire as shown per Fig.3.

Note :

Since each wire element is being affixed with its own cord.

assemble the antenna by referring to each assembled an-

tenna figure.

Note :

Set adjustment element downward to avoid effecting reso-

nant frequency of the main element. And at insulator sec-

tion at both ends. rest of 55cm (21.7') turned back be-

comes an adjustment element.

Note :

Tie an insulator and nylon rope firmly as shown per Fig 4.

4. Finally, connect 50Q coaxial cable to the balun.To make con

nector Section waterproof, wrap around self-melting adhesive

plastic tape supplied by stretching it about two times. Then wrap

around conventional plastic tape to ensure it.(Fig 5)

Installation

There are various ways of installing the antenna depending on

the place where it is installed. In any case, take the following

points into account.

1. Since maximum voltage occurs at both ends of the antenna in

transmission, touching these points may lead to electric shock.

And it is recommended to locate both ends of the antenna al

least 1 to 2m (3.3'to 6.6') away from a building wall to avoid

spark noise which may cause TVl.

2. If the antenna is installed the way it is shown in Fig.B or D. to

avoid having direct load from coaxial cable, turn a coaxial cable

around the balun once and fix with a plastic tape. Set coaxial

cable away from the element to avoid causing bad VSWR or

unstable VSWR.

3. If the antenna is installed between two trees, to avoid breaking

the element by strong wind, it is recommended to pul elastic ma-

terial such as rubber band or coil spring at the both ends of the

element.

4. Since antenna adjustment has to be practiced at the place where

the antenna is being operated, it is useful to make the antenna

up and down easily. It is also useful get rid of earth effect if the

antenna is installed as a horizontaldipole antenna, for the height

of the antenna is related with propagation impedance of the an-

tenna.

Fig. 1

20cm(7.9")

Fig. 2

15-16cm

(5.9"-6.3")

Fig. 3

Fig.4

Fig.5

7cm(2.8")

7cm(2.8 )

Spr

Spring washer

ing w

ing

asher

Adjustment element

djustmen

t elemen

Binding wir

Binding wire

Adjustment element

djustmen

t elemen

Wire holder

e holder

Trap