TASK I
Center Radiator Assembly
( ) Refer to Figure A to assemble the Center Radiator. Attach BA tubing section to either
end of the Base Insulator (IN) with (2) 1/4-20 x 2" bolts (S8) and (2) 1/4-20 nylock nuts
(N5). Do not tighten the nuts at this time.
( ) Find the (2) counterpoise rings (RI) The ones with the tabs. . Press the flat sides of the
rings together and slide them onto the Base Insulator (IN). Leave rings loose at this time.
( ) Attach the drilled end of tubing section BB to the Base Insulator (IN) with (2) 1/4-20
x 2" bolts (S8) and (2) 1/4-20 nylock nuts (NS). Do not tighten the nuts at this time.
( ) Place (1) hose clamp (HC 1) over the slotted end of tubing section BB. Slide unslotted
end of BC tubing section into BB until it stops. Tighten hose clamp. NOTE: For
protection against oxidation, a conductive paste such as NoAlox® may be used between
telescoping pieces of aluminum tubing only.
Do not apply the paste to insulators or coax
connections.
( ) Place (1) hose clamp (HC 1) over the slotted end of tubing section BC. Slide unslotted
end of BD tubing section into BC. Tighten hose clamp.
( ) Place (1) hose clamp (HC 1) over the slotted end of tubing section BD. Insert AV-680
Coil Assembly (LI) 4 inches into tubing section BD. Tighten hose clamp.
( ) Install two sections BE and BF on top of the coil assembly. Use the 6-32 x 1- ¼
screw and nut to secure BE into the top of the coil assembly. Slide BF into BE three
inches and place the HC2 hose clamp over the slotted end and tighten. Install the
jumper on the top of the loading coil to the tube BE using a 6-32 x 1-1/4” screw and nut.
( ) Place 5/8" plastic cap (C2) on end of tubing section BF
TASK II
Stub Base Bracket Assembly
( ) Refer to Figure B for Stub Base Bracket Assembly. Study Figures B and C to learn
how the stub base brackets are attached for each band. Note how the brackets are offset
90 degrees from each other for proper antenna assembly.
( ) Find the aluminum Stub Brackets (SB 1 & SB2). Attach a Radiator Bracket (RB) to
each Stub Bracket with (2) 6-32 x 3/8" screws (S I) and (2) 6-32 lock nuts (N1) as shown
in Figure B.
( ) Find a Single Stub insulator (P3). Attach it to a Radiator Bracket (RB) with (2) 6-32 x
3/8" screws (S I) and (2) 6-32 lock nuts (NI).
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