3 0 8 I n d u s t ri al P a r k R o a d
S t ar kv i l l e, M S 3 9 7 5 9 U S A
Ph:
(662) 323-9538 FAX: (662) 323-6551
KIT-160-88
160-Meter Add-On Kit for
DX-88 Vertical Antenna
INSTRUCTION MANUAL
GENERAL INFORMATION
This kit consists of a 160 meter loading coil
assembly, a tuning capacitor assembly, a base
matching coil assembly, and assembly
hardware. This 160 meter kit can easily be
added to any DX-88 vertical antenna to
provide 160 meter band coverage. This kit
will also improve performance on the 80
meter band by increasing the physical length
of the antenna. Since the 160 meter coil and
tuning capacitor must be manually switched
into and out of the circuit, this kit is only
recommended for ground-mounted
installations.
This 160 meter kit will provide tuneable
coverage of the entire 160 meter band, 1800-
2000 KHz. You may set the tuning capacitor
on the 160 meter kit to any specific operating
frequency or you may set the tuning capacitor
for the middle of the band and use an antenna
tuner or external matching device to match the
antenna when you change frequencies within
the 160 meter band.
The addition of the 160 meter coil at ap-
proximately 5 feet above the base of the
antenna provides greater radiation efficiency
than trying to match the DX-88 without the
160 meter coil, or with base loading.
The base matching coil will provide a DC
ground for the antenna and will also help to
bring the VSWR down to 1.0 at resonance. It
will need to be replaced or modified to help
the match on the 80 meter band. It will not
affect operation on 40 through 10 meters.
The loading coil is constructed of heavy wall,
high dielectric strength, laminated fiberglass
using #12 AWG insulated copper wire and
enclosed in a weather protective thermofit
cover. The tuning capacitor is made from 2"
aluminum tubing with a large air gap and
Teflon @ spacers to prevent high voltage
flashover. All hardware is stainless steel.
Teflon® is a registered trademark of DuPont de Nemours, I.E., & Co.,
Inc.
SPECIFICATIONS (160 meters
Tuning Range .......................................................................................1800-2000 KHz
Maximum Power ...................................................1500 watts PEP 700 Watts Average*
2:1 VSWR Bandwidth ...................................................................................... 20 KHz
Nominal Impedance ......................................................................................... 50 ohms
Recommended Radials (not supplied) ..........16 each, 24 ft (7.3m) 16 each, 14 ft (4.3m)
*5 mi n .
o n, 5 mi n o f f
