Diamond Antenna CPVU8, Operation Instructions

Mast bracket

V-volt

Pipe bracket

Volt

Nuts

Washer (L)

Washer (S)

Core

3.5MHz Radiator 
(Element 874mm)

Main body

7MHz Radiator 
(Element 280mm)

14MHz Radiator 
(Element 280mm)

21MHz Radiator 
(Element 360mm)

28MHz Radiator
(Element 260mm)

29MHz Radiator Adjustment 

Element (174mm)

29MHz Radial Adjustment 

Element (610mm)

3.5MHz Radial 
(Element 780mm)

7MHz Radial 
(Element 330mm)

14MHz Radial 
(Element 280mm)

21MHz Radial 
(Element 850mm)

28MHz Radial 
(Element 780mm)

50MHz Radial 
(Element 610mm)

Wrench

Tranceiver

SWR meter

Antenna tuner

CPVU8

--

Note

------------------------------------------------------------------

・

Touching the antenna during transmission may cause to 

electrify. Pay attention not to touch the antenna especially 
for children if installing on a balcony railing.

・

Please refrain from operation at over power than the 

specified.

・

Kindly check tight fastening of each mounts, set screws 

etc. regularly to prevent any accident.

・

When the install location is changed, please check and 

adjust SWR of each frequency newly.

・

Specifications

Frequency range  3.500-3.575MHz

7.00-7.10MHz
14.00-14.35MHz
21.00-21.45MHz
28.00-29.70MHz
(The element is required at 29.00MHz)
50-52MHz
144-146MHz
430-440MHz

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Gain

2.15dBi (144MHz)
5.5dBi (430MHz)

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VSWR

Less than 2.0 (3.5/7/14/21/28/50MHz)
Less than 1.5 (144/430MHz)

Max. power rating  200W SSB, 50W CW 

(3.5/7/14/21/28/50MHz)

150W FM (144/430MHz)

Mast diameter accepted

φ

30-62

Length 2.7m
Weight 2.4kg
Connector M-J

Though these products purchased are manufactured 
under strict quality control, if damage is caused by 
transporting, ask your dealer promptly.

Design and specifications of these products will be 
changed for future improvement without advance notice.

VSWR

About the antenna tuner

CPVU8 is designed as using the antenna tuner makes the 
best SWR. When operating, the auto antenna tuner of the 
transceiver is ON. If the transceiver doesn’t have the 
antenna tuner, use the antenna tuner. Check the antenna 
tuner instruction when operating the antenna tuner. 
Set the SWR meter between the transceiver and the 
antenna tuner and check the SWR. If SWR is less than 
2.0, you can operate the antenna tuner ‘Through”. 
(However, if protection circuit of the transceiver is 
operated and the transmitting is stopped automatically, it 
is not so.)

CPVU8

Operation Instructions

Description

The CPVU8 is an eight-band ground plane antenna for 
3.5/7/14/21/28/50/144/430MHz.
Since the CPVU8 is compact and light weight, it can 
be used for temporary base station antenna.
The CPVU8 can be used at 144/430Mhz without any 
adjustment. Other bands (3.5/7/14/21/28/50MHz) can 
be tuned by sliding the each element.

-Note---------------------------------------------------------------

<<Installing the antenna>>
Don’t install on a rainy or windy day since it is dangerous.
Don’t attempt to install the antenna only by yourself. 
Installing the antenna alone on the roof may lead you 
dangerous accident. Always ask your friends for help 
installing the antenna.
Don’t drop the antenna, tools and attachment when 
installing the antenna in the height. Install the antenna 
before assembling it on the ground.

Parts Description

80m,40m,20m,15m,10m,6m,2m and 70cm Eight-band Vertical Antenna

DIAMOND ANTENNA CORPORATION

 Miyata Building, No.15-1,1-chome Sugamo,Toshimaku Tokyo,Japan 170-0002 TEL.03-3947-1411 FAX.03-3944-2981

Home Page   http://www.diamond-ant.co.jp

E-mail overseas@diamond-ant.co.jp

(Antenna tuner is needed)