Diamond HF6FX Instruction Sheet
HF6FX
50-54 MHz Mobile Antenna
Instruction Sheet
The HF6FX is a 6m adjustable mono-band, 1/4 wavelength mobile antenna, optimized for 6m amateur band.
Tunable bandwidth 1.8 MHz from 50-54 MHz.
Specifications
FREQUENCY: 50-54 MHz
GAIN: 2.15 dBi
POWER: 250 Watts
IMPEDANCE: 50 Ohms
VSWR: 1.5:1 (Nominal)
ELEMENT PHASING: 1/4 Wave
GROUNDING: Required for optimum performance
LENGTH: 44 1/4” (fully extended)
WEIGHT: 0.3 lbs. (130 g)
MOUNT: UHF MALE (PL259)
WARRANTY: 1 Year against defects in material or workmanship.
RECOMMENDED MOUNTS: K400C, K412C or K600M Trunk Mounts.
Installation Instructions
NOTE: THIS ANTENNA REQUIRES TUNING TO DESIRED OPERATING FREQUENCY. USE QUALITY VSWR
METER TO INSURE PROPER ADJUSTMENT. THE HF6FX REQUIRES PROPER VEHICLE GROUND. MOUNTING LOCATION WILL AFFECT VSWR. NOT RECOMMENDED FOR MAGNET MOUNTS.
(1) Remove antenna from package and inspect contents to insure it is complete. Attach whip element assembly #990701
to matching coil assembly #990702. (Illustration 1 & 1A)
(2) Choose desired mounting location to insure maximum strength of mount, and proper vehicle ground to yield best
performance of antenna.
(3) Install antenna on vehicle. With quality VSWR meter, check VSWR for proper antenna tuning. Tuning adjustments
may be required to reach optimum VSWR.
1.5
1.0
+1.8 MHz–1.8 MHz fo
Tuning of Antenna
Loosen element lock nut and slide antenna whip up or down. (Illustration 2 & 3) Tune until lowest VSWR is obtained at
desired center frequency. Tighten adjustment lock nut. Recommend using removable Locktite Threadlocker #242 or
similar product to insure proper fastening of setscrews and element assembly.
(Note: Mounting location and mounting structures will effect RF grounding and resonant frequency. If adjustment of whip
is necessary, adjust in 1/8-inch increments until desired resonant frequency is obtained.)
DIAMOND ANTENNA Products are distributed by RF PARTS COMPANY
435 S. Pacific Street•San Marcos, CA 92078 •(760) 744-0900
www.diamondantenna.net
upper
whip element
matching coil
assembly
#1
#1A
upper whip
element
loosen fastening screw
#2
Adjust to desired center frequency by
sliding the element in and out.
#3
#990703
L shaped
hexagonal
wrench
#990701
element
assembly
#990702
matching coil
assembly
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