40m,15m,10m and 6m(7/21/28-29 and 50MHz) Four-band Vertical Antenna
CP-725H
・Description
①The CP-725H is a four-band vertical
antenna for HF band.
②Compact, light weighted and very easy
to assemble.
③It is completely self-supported and
does not need any guy wires.
④Trap radials could be concentrated on
one direction instead of spreading
them around the antenna. This is
especially convenient if the antenna is
installed on balconyrailing or window
side of condominiums and urban
apartments.
⑤Since the antenna is direct DC ground
at the feed point, coaxial cable and
transceiver are beingprotected from
the high voltage caused by lighting.
⑥Center frequencies of the antenna are
adjustable in each band simply by change
the length of each radial element.
⑦Top loading structure utilizing capacitive
hat enables the antenna to complete
with full quarter wave length antennas
in its performance.
⑧It is rigid and rugged enough to withstand
the wind pressure over 100MPH.
⑨Mast brackets area adjustable to accept
1 1/5” to 2 1/3” diameter mast.
⑩Feed point section is kept waterproof
by covering it with support pipe.
⑪10m FM band compatible.
・Parts Description
Operation Instructions
（Fig 1）
Pipe No. 1 φ15
M27005
Internal tooth lock washer M4
M27019
Tapping screw M4 x 8
M27018
Double element
trap coil assembly
M27006
Internal tooth lock washer M4
M27019
Tapping screw M4 x 8
M27018
Pipe No. 2 30φ
M27007
Spring washer M6
M27017
Hex head screw
M6 x 8
M27016
15m(21MHz) radial element
trap coil assembly
M27011
Mast bracket set
M27001
Radial nut
40m(7MHz) radial element
trap coil assembly
M27012
Mast support pipe
M27002
Radial element holder
M27003
6m(50MHz) radial element
trap coil assembly
M27009
10m(28-29MHz) radial
element trap coil assembly
M27010
Radial element
M27013
Feed point
assembly
M27004
Hex head screw
M6 x 8
M27016
Spring washer M6
M27017
Capacity hat assembly
M27008
Capacity hat
fastener ring
M27020
Radial element fastener ring
M27014
V-bolt with nut
M27021
8cm
・Parts Description
Parts # Description
Qty
M27001 Mast bracket set
2
M27002 Mast support pipe
1
M27003 Radial element holder
1
M27004 Feed point assembly
1
M27005 Pipe No. 1 φ15
1
M27006 Double element trap coil
assembly
1
M27007 Pipe No. 2 30φ
1
M27008 Capacity hat assembly
4
M27009 6m(50MHz) radial element
trap coil assembly
1
M27010 10m(28-29MHz) radial
element trap coil assembly 1
M27011 15m(21MHz) radial element
trap coil assembly
1
M27012 40m(7MHz) radial element
trap coil assembly
1
M27013 Radial element
4
M27014 Radial element fastener ring 4
M27015 Grip nut
4
M27016 Hex head screw M6 x 8
3
M27017 Spring washer M6
3
M27018 Tapping screw M4 x 8
4
M27019 Internal tooth lock washer M4 4
M27020 Capacity hat fastener ring
1
M27021 V-bolt with nut
2
Nut with radial
element fastener ring
Screw with radial
element fastener ring
Screw with radial
element holder
※ Radiator has a water drain hole.
Leave it opened.
Grip nut
