1/4-20 NYLON LCK NUT
705-2520S-NL
3
#6 self taping screw
656S-0375S-A
1
745-31116S
#16 Hose clamp
736-1848
ABS WIRE BRACKET
32
745-31116S
GOLD U-BOLT SET
1
566344
FLAT WASHER
4
554071
10-24 HEX NUT
16
561178
SPLITWASHER #10
16
500158
10-24 X ½ BOLT
6
656-0312S
6-32 X 5/16
16
705-0632S-K
6-32 KEEPNUT
18
ABS WASHER
736-1845-W
5
1/4-20 X 3-3/4 BOLT
662-3250S
1
ROPE RING
736-1835-RR
2
ABS CABLE TIE
745-2149B
30
32
17-1838-1 PARTS PACK
745-31116S
STAINLESS U-BOLT SET
2
014388
10-24 NYLON NUT
4
705-0632-NL
6-32 NYLON NUT
1
500321
10-24 X 1-3/4 BOLT
14
Antenna Mast
The recommended support mast for the MFJ-1838 is steel water pipe between the sizes
of 1-1/2" OD to 2" OD and with a length that will place the antenna base at a safe
height. The MFJ-1838 is designed to operate at a height of 10 or more feet for pro per
performance. Placement on the side of a house or garage at eaves level is acceptable as
long as the wires will not be in contact with anything.
Antenna Grounding
Although the MFJ-1838 is designed to operate efficiently without the requirement of an
earth ground, SAFETY GROUNDING must still be provided to protect equipment,
property and persons from the hazards of lightning strikes and other weather related
electrical discharges. In addition the coaxial cable feeding the antenna should have the
shield grounded to eliminate the risk of any indoor equipment failure from allowing
hazardous voltages from appearing indoors and creating a shock hazard. The support
mast should be grounded with a large diameter ground wire.
Additional protection can be accomplished by grounding the shield of the coax where
it enters the building to a good earth ground or directly burying the cable in the earth
for several feet before it enters the building. The coaxial cable should be totally
disconnected from the station during threatening weather conditions for maximum
lightning protection.