Hy-Gain TH3-MK3 Thunderbird Instruction Manual

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S6OlrNortheast Highway 6 . Lincoln, Nebraska 68505 U.S.A.
Telephone: t4O?, 467-5321 telex: Hygain Lcn a 48-4324
EUFIOPE: 22, rue de la Ldgiond'Honneur
93200 Saint-Denis - France
Tdldohone: 820.98.46 telex: Telcodi 630013
P N 8 0 1 2 3 5
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DIVISION OF TELEX COMMUNICATIONS, INC.
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ORDER NO. 388
T H 3 . M K 3 T H U N D E R B I R D
3-Element, Ham Antenna
MANUAL
General DescrlPllon
$peclfications
Preparation
ol Assembly
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FOR OUR OVERSEAS
CUSTOMERS:
The UnitedSates uses En0lish units of
measurement
Please see the last page of this manualSassistance
in identifying the
hardware and components supplied with this prodbct
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The Hy-Gain TH3-Mk3 is a three-d.iement tri-band beam antenna designed for operation
on 10, 15 and 20 meters. Multi-barlding is accomplished through the use of Hy-Gain's all
Hy-Q traps. The antenna is desig$ed to fit a 1s/e" (41 mm) O.D. mast and can be rotated
with a heavy duty TV rotator. F
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I n p u t i m p e d a n c e . : . . . . . $ . . . . . . . . .
Gain.
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F r o n t - t o - b a c k r a t i o . . . . . f t . :
. . . . 2 5 d 8
M a x i m u m p o w e r i n p u t .
. i . . . .
. . . . . 1 k w A M
V S W R ( a t r e s o n a n c e ) . . .
. . . . . . . t
Lightning protection
.... t: DC ground
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Mechanical
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'11,11?3,
L o n g e s t e l e m e n t
. . . . . : . 9 . . . . . . . . 2 i f t . ( 8 2 3 . 7 c m )
M a x r m u m w i n o s u r v i v a t . . . . . . . & . . . .
. . r . . .
. . . . 1 0 0 m p h ( 1 6 0 . 9 3 k m p h )
Net weignt.
Accepts mast. .
.i.Fr, . .
.11A" lo 2V2" O.D. (32 mm - 64 mm)
W i n d s u r f a c e a r e a
. . . . . . . } ] . . . 5 . 1 0 s q . f t . ( 0 . 4 7 4 m 2 )
W i n d l o a d a t B 0 m p h
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The antenna site should Oe treeiOt large buildings, metal objects or powertines.
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When Installtng your system, take extreme cara to avold any contact wlth
overhead powerllnes. Fatture to exerclse thls care could result ln serlous or
fatal tnlury.
There are two methods of installing the TH3-Mk3 at the top of your tower.
Method 1 - Completely assemble the antenna on the ground then hoist it into position
using a block and tackle as shown in Figure 1. -. _
Method 2 - Assemble the antenna on the ground in halves, then hoist each half up the
lower and assemble in the boom-to-mast bracket on the tower as shown in Figure 2.
All tubing supplied with the TH3-Mk3 telescopes together. Make all measurements as
accurately as possible using lhe given dimensions to gain optimum results from your
antenna.
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