
Whip element
Set screws
Tiltable whip section
Hexagonal wrench
OPERATING MANUAL
DP-NR2 2M 1/2 Wave Gain Whip Antenna With Omnidirectionally
Tiltable Element Structure. (I.R. 1412570)
●Description
1. The DP-NR2 is a radialless whip antenna
which works well at temporary fixed
station, with motorcycle, with bicycle
or with handheld transceiver.
2. Stiff 17-7 PH stainless steel is used in
element material to avoid unwanted
vibrations that cause QSB.
3. Despite its rather short, 1.1m (43.3”),
element length, it achieves substantial
gain which is enough to compete with
5/8 wave antennas.
4. Omnidirectionally tiltabie whip struc-
ture (I.R. 1412570) is employed to
avoid troublesome antenna detachment
when a car is parked in a garage.
5. The antenna is designed to go well with
contemporary car design.
●Installation Procedure
The DP-NR2 can be installed anywhere
on a car with Diamond’s gutter or trunk
mount bracket, or rooftop magnetic base.
●Adjustment Procedure
The antenna is factory adjusted at 2 m
band center frequency, so that it can be
used without any adjustment.
If the center frequency of the antenna
has to be changed, it can be altered by
putting whip element in and out at tiltable
whip section as follows;
First, loosen two set screws at the top of
tiltable whip section with hexagonal
wrench attached. Then put the element in
and out to get lowest vswr at desired fre-
quency. And fasten these two set screws
with the wrench to fix it. (See below
figure for reference.)
●To Tilt the Antenna
If the antenna has to be tilted, to park
a car at a garage for instance, it can be
tilted for any direction simply by pulling
tiltable whip element up. Be sure not to
drive with the antenna tilted for safety
purpose.
●Notice
Fasten set screws after several drives
after the antenna is installed on a car,
especially if the antenna is brand new,
since they may be loosened by vibrations.
●Specifications
Frequency
Gain
Max. Power Rating
Impedance
VSWR
Length
Weight
Connector
Type
144 〜146 MHz
2.15 dBi
200W
50 ohms
1.5 or less
1.1 m (43.3”)
150 g (0.33 lbs)
UHF
1/2 wave radialless
whip
第一電波工業株式会社 国内事業部 〒350-0022埼玉県川越市小中居445-1 TEL.049-230-1220(代)FAX.049-230-1223
DIAMONDANTENNACORPORATIONMiyataBuilding,No.15-1,1-chomeSugamo,ToshimakuTokyo,Japan170-0002TEL.03-3947-1411FAX.03-3944-2981
ホームページhttp://www.diamond-ant.co.jp