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Tension ring

M45018

Hat S
M45009

S trap
M45006

Hat
M45008

Hat SS
M45010

Hat ring
M45011

Screw with radial 
element fastener ring 

Nut with radial 
element fastener ring

Screw with radial element holder

Radial coil for 3.5MHz

M45015

Pipe No. 1 

φ

7.4  

M45001

Pipe No. 2 

φ

10

M45002

Pipe No. 3 

φ

30

M45003

Pipe No. 4 

φ

30

M45004

Pipe No. 5 

φ

30

M45005

Tapping screw M4x8
M45021

Tapping screw M4x8
M45021

Tapping screw M4x8
M45021

Tapping screw M4x8
M45021

Tapping screw M4x8
M45021

Tapping screw M4x8
M45021

Inner tooth washer M4
M45022

Inner tooth washer M4
M45022

Inner tooth washer M4
M45022

Inner tooth washer M4
M45022

Inner tooth washer M4
M45022

Inner tooth washer M4
M45022

Loading Coil for 7MHz
M45007

Mast bracket

 M45019

Radial nut

M45025

Radial coil for 7MHz

M45016

Support pipe

M45014

Radial ring

M45013

Radial element

M45017

Feeding point assembly

M45012

Hex head screw  M6x8

M45023

Hex head screw  M6x8

M45023

Spring washer M6

M45024

Spring washer M6

M45024

V-volt set

M45020 

80m and 40m Dual-band Vertical Antenna

CP8040

Parts Description

Operation Instructions

Fig

­1)

Description

The  CP8040  is  a  dual-band 
vertical

 

antenna for HF low band.

Compact,  light  weighted  and  very 
easy to assemble.

It is completely self-supported and 
does not need any guy wires.

Trap radials could be concentrated 

on  one  direction  instead  of 
spreading  them  around  the 
antenna.  This  is  especially 
convenient  if  the  antenna  is 
installed  on  balcony  railing  or 
window side of condominiums and 
urban

 

apartments.

Since  the  antenna  is  direct  DC 
ground  at  the  feed  point,  coaxial 
cable  and

 

transceiver  are  being 

protected  from  the  high  voltage 
caused by lighting. 

Center frequencies of the antenna 
are  adjustable  in  each  band 
simply  by

 

change  radial  length 

and capacity hat (80m only).

Top  loading  structure  utilizing 
capacitive 

hat 

enables 

the 

antenna  to  complete  with  full 
quarter  wave  length  antennas  in 
its performance.

It  is  rigid  and  rugged  enough  to 
withstand  the  wind  pressure  over 
35m/sec.

Mast  brackets  area  adjustable  to 
accept  1  1/5”  to  2  1/3”  diameter 
mast.

Since  feeding  point  is  covered  by 
the  support  pipe,  it  is  excellent  in 
the waterproof property.

CP8040 can be used 3.5-3.8MHz / 

7-7.2MHz. 

Parts Description

Parts # 

Description

        

Qty

M45001  Pipe No. 1 

φ

7.4            1

M45002  Pipe No. 2 

φ

10             1

M45003  Pipe No. 3 

φ

30             1

M45004  Pipe No. 4 

φ

30             1

M45005  Pipe No. 5

φ

30             1

M45006  S trap                            1
M45007  Loading coil for 7MHz      1
M45008  Hat

  

                            2

M45009  Hat S  

                     4

M45010  Hat SS   

                      4

M45011  Hat ring          

               1

M45012  Feeding point assembly   1
M45013  Radial ring        

  

      

  1

M45014  Support pipe 

           1

M45015  Radial coil for 3.5MHz      1
M45016  Radial coil for 7MHz         1
M45017  Radial element    

      2

M45018  Tension ring 

   

     2

M45019  Mast bracket 

    

    2

M45020  V-volt set 

                  2

M45021 Tapping  screw  M4x8

12

M45022  Inner tooth washer M4   12
M45023  Hex head screw  M6x8    3
M45024  Spring washer M6          3
M45025  Radial nut 

                2

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