Diamond Antenna NR22L Instructions
NR22L
2m Mobile Antenna
Instruction Sheet
The NR22L is a high performance mono-band, 2-5/8 wavelength mobile antenna,
optimized for the 144-148 MHz amateur band. The NR22L yields 6.5 dB gain from a
Mobile antenna. Use Diamond Antenna model K400C or K600M Trunk Mount, for
best performance.
Specifications
FREQUENCY: 144-148 MHz
GAIN: 6.5 dB
POWER: 100 W atts
IMPEDANCE: 50 Ohms (Nominal)
VSWR: 1.5:1 (Nominal)
ELEMENT PHASING: 2-5/8 W ave
LENGTH: 96.9”
WEIGHT: 1.1 lbs. (500g)
MOUNT: UHF MALE
WARRANTY: 1 Year against defects in material or workmanship.
RECOMMENDED MOUNTS: K400C or K600M
Installation Instructions
(1) Remove antenna from package and inspect contents to insure it is complete.
(2) Choose desired mounting location to insure maximum strength of mount, and
best performance of antenna.
(3) Assemble upper whip element #12201 to Phase inductor #12202.
(4) Install antenna on vehicle. With quality VSWR meter, check VSWR for proper
antenna tuning. The NR22L is pretuned and should require no additional tuning. However, choice of antenna mount and location should take into consideration the antenna’ s
size and the torque imparted to its mount. Mounts of sufficient strength are Diamond
models K400C and K600M.
NOTE: In some installations it may be desirable to trim a small amount from each
element. Trimming 1/4” increments will have the ef fect of raising the operating frequency .
Measure VSWR at lowest and highest operating frequency to optimize range.
(5) Tighten setscrews. Recommend using removable Loctite Threadlocker #242 or
similar product to insure proper fastening of setscrews.
NOTE: Not recommended for Magnet Mounts.
12201
12202
12203
B-03
B-05
12204
12205
Part # Part Description
12201 Upper Whip Element
12202 Phase Inductor
12203 Lower Whip Element
12204 Omnidirectionally tiltable
Whip structure section
12205 Impedance matching section
B-05 Set Screw
B-03 Hexagonal Wrench
DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY
435 S. Pacific Street • San Marcos, CA 92078 • (760) 744-0900
www.diamondantenna.net
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