3.5 -9
f0
+9
7
-14
f0
+14
14 -50
f0
+50
21 -100
f0
+100
28-29 -125
f0
+125
50 -1000
f0
+1000
MHz
KHz
KHz
1.5
1.4
1.3
1.2
1.1
Band
Spread
One direction
Length/
radials
radials
Frequency
80m(3.5MHz)
Applox.540mm
Applox.450mm
35mm/10KHz
40m(7MHz)
Applox.470mm
Applox.440mm
10mm/10KHz
20m(14MHz)
Applox.490mm
Applox.400mm
15mm/20KHz
15m(21MHz)
Applox.540mm
Applox.460mm
32mm/50KHz
10m(28-29MHz) Applox.420mm
Applox.380mm
35mm/50KHz
6m(50MHz)
Applox.420mm
Applox.300mm
50mm/1MHz
(Table A)
Tranceiver
VSWR
meter
CP-6S
(Fig-10)
10 Turn each radial element into radial
element holders. Then align water
drain hole in each radial element trap
coil assembly downward by turning
backward and fasten each element
with grip nut, Note that 6m radial
element does not have trap coil assem-
bly. (Refer to Fig-9)
<<Note>>
To avoid breaking each radial element
trap coil assembly, turn it into a holder
lightly till it stops and turn backward to
align water drain hole downward and
secure with a screw.
●
Adjustment
<<Note for frequency adjustment>>
Practice the following adjustment
procedure at the place where the antenna
is actually installed.
Test transmission for the adjustment has
to be performed for as short time as
possible and with as low RF power as
possible. Maximum RF power rating of
continuous wave.
(CW or FM at less than 10W)
1 Prepare suitable VSWR meter for
operating frequencies and output RF
power. Then connect it as shown in
below.
2 Adjustment procedure can be started
from any frequency you like. Transmit
at desired frequency and trim adjust-
ment length of radial element to have
lower VSWR at the frequency.
Adjustment length of each radial element
is shown in the following table. If you do
not have a VSWR meter, adjust it to a
typical adjustment length.
※
If the radial element of a band is made
longer, resonant frequency of the band
is made lower proportionally.
※
Though typical adjustment length of
each radial element is set at center
frequency of each band, it varies more
or less depending on the place the
antenna is installed.
Adjustment example:
If center frequency of 40m band is set at
7.050MHz and real center frequency
when the antenna is installed is at
7.010MHz, then frequency difference
between is:
7.050MHz (desired center frequency) –
7.010MHz (real center frequency) =
40KHz.
From Table A, adjustment length at 40m
band is about 10mm per 10KHz,
therefore:
10mm x 40KHz / 10KHz = 40mm
Since real center frequency is lower than
desired center frequency, radial element
has to be made 40mm shorter to have
7.050MHz center frequency.
●
VSWR
●
Specifications
Frequency range
/
80, 40, 20, 15, 10, 6m
(3.5, 7, 14, 21, 28-29, 50MHz)
Feed point Impedance
/
50Ω
VSWR
/
Less than 1.5
Maximum power rating
/
200W(SSB),
70W(FW/CW)
Maximum wind resistance
/
90MPH (40m/sec)
Length
/
177”(4.5m)
Radial element length
/
71”(1.8m)
Weight
/
9.9lbs (4.9Kg)
Mast diameter accepted
/
1 1/5” – 2 1/3” (30-62φ)
Design
/
6band trap vertical antenna
with trap radials
■
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.
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 [email protected]
