Comet CHF-10 Bedienungsanleitung

MODEL CHF-10

Thank you for purchasing our products.

For your safety :

Read this manual carefully for proper handling and operation before using.

Keep this manual in a safe place for future reference.

【Features】

●　1/4λ Base loading type, multi-band HF Antenna.

●　Designed to be widely adjustable, simple and compact.

【Specification】

【Appearance】

HF~50MHz 10 Band Mobile Antenna

● TX Frequency : 3.5/3.8/7/10/14/18/21/24/28/50MHz

● Max. Power : 200W J3E/SSB

● Impedance : 50Ω

● VSWR : 1.5 or less

● Connector : PL-259 (M-P)

● Max. Length : 1.88m

● Weight : 830g

Antenna

Base

Element

fixation

screw

Top

Element

Tuning

Bracket

Knurling Vis

Hex Wrench

Knurling Vis

(Long)

Knurling Vis

(Short)

　　 PRECAUTIONS for mounting

●Check if the connecting cable fits into the antenna connector. If they don’t

match, it could cause damages or disconnection.

●While driving, the antenna could fall down and SWR could be higher due to

the lack of ground contact area.

●Placing any other antennas or electrical conductors nearby this product

could make SWR higher or fluctuateresonance frequency.

For : 3.5/3.8/7/10/14/18/21/24/28/50MHz

Instruction Manual

Connector

3.5MHz : Aprrox. 5 KHz/cm

3.8MHz : Aprrox. 6 KHz/cm

7.0MHz : Aprrox. 10 KHz/cm

10MHz : Aprrox. 12 KHz/cm

14MHz : Aprrox. 30 KHz/cm

18MHz : Aprrox. 50 KHz/cm

21MHz : Aprrox. 80 KHz/cm

24MHz : Aprrox. 100 KHz/cm

28MHz : Aprrox. 110 KHz/cm

50MHz : Aprrox. 120 KHz/cm

【VSWR Data】

COMET CO.,LTD.

4-18-2, Tsuji, Minami-ku, Saitama-shi, Saitama-Pref, 336-0026, JAPAN

TEL : 81-48-839-3131 / FAX : 81-48-839-3136

URL : http://www.comet-ant.co.jp/english

【Maintenance】

Check SWR before using to confirm if the antenna works normally.

Check if screws, bolts and nuts are tightened securely, and if not, retighten them.

Be sure to change the parts, deformed by long-term use or low in intensity.

Knurling Vis

for temporary use

【How to Adjust】

1. Make sure to choose the right terminal, according to

the right fig.

2. Slide the Tuning Bracket to the designated terminal.

3. Adjust the length of the element to the designated

length, shown in the right fig.

4. Measure SWR at operational freq. Cut the element in

case tuning freq is lower.

5. Extend the element in case tuning freq is higher.

*Freq band could be narrower depending on the

distance with a human body.

**Tuning Bracket should be fixed at Terminal 0 when

used at 3.5/3.8MHz.

Term. 8

Use with 14MHz

for 50MHz

Standard Length L

3.8 MHz :

7 MHz:

10 MHz:

21 MHz:

24 MHz:

28.5 MHz:

51 MHz:

1365 mm905 mm

900 mm945 mm

1020 mm950 mm

1128 mm1050 mm

14MHz:

Term. 7

Term. 6

Term. 5

Term. 3

for 28MHz

for 24MHz

for 21MHz

for 14MHz

It the position

changes to the

top and bottom.

Standard Length L

3.5 MHz : 18 MHz: 1030 mm1185 mm

Term. 4 for 18MHz

Term. 2 for 10MHz

Term. 1

for 7MHz

Precautions for using

This antenna is only for ham radio. Do not use this for other purposes.

Operation outside the specification might damage the antenna.

Adjust the antenna correctly. Elevated SWR could damage the antenna.

Never attempt to modify or fix the antenna by yourself.

Do not touch the antenna while transmitting.

【How to use】

1. Make sure all the screws are securely tightened.

2. Mount the antenna to the base etc.

3. Keep the antenna as vertically as you can for better

transmitting.

4. Measure SWR before using.

Specifications or appearance is subject to change without notice.

*Each freq band shall be clearly marked on the element.

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