Hy-Gain TH3JR User Manual
ASSEMBLY
OENERAL DESCRIPTION
AND
OPERATION
OF
MODEL
THUNDERBIRD JUNIOR
THE
TH~JR
re=]
The TH-3jr antenna was designed for the Ham
with severe space limitations but still wants top
performance on 10, 15 and 20 meters. The
TH-3jr
is
constructed of durable, lightweight
taper-swaged aluminum tubing offering very
low wind resistance and making it possible to be
rotated with a heavy duty TV rotator. Since it
is
light in weight
it
is
ideal for rooftop or lightÂweight tower installations. The antenna features
an all new trap design, hardware that is iridite
treated to Mil Specs and molded high-impact
insulators.
SPECIFICATIONS
ELECTRiCAL
Forward Gain.
Front to Back Ratio..
VSWR at Resonance. less than 1.5:l
Nominal Impedance.. 50 ohms
Power Capability.. .600 W P. E. P. 300
....................
.................
..........
...............
.
up to 8 db
.25 db
W
AM
w n
ANTENNA PRODUCTS
*.I.
-a
1
Llm
Crnk
Unrbln.
*.lmhb
U.S.A.
Net Weight..
Boom Length.
Longest Element..
Turning Radius
Wind (Survival).
........................
........................
...................
.......................
....................
.80 mph
26 lbs.
.12 ft
.26 ft.
14'9"
WARRANTV
Hy-Gain Antenna Products guarantees for a period of
date of purchase, each new product manufactured to be free from
defects in workmanship and/or materials. Any part or accessory,
be
shall
due
ing, atuse, normal wear or poor installation. No further guarantee
or warranty
full responsibility for proper installation
This warranty
filled out
purchase.
Hy-Gain Antenna Products reserves the right to make changes in
current production models without being obligated
changes in earlier production models.
replaced free of charge providing the defect
to
faulty wo*manship and/or material, and not caused
is
implied and in acceptingddivery the purchaser assumes
is
by
valid only if the Owner's Warranty Card
the purchaser and mailed
and
service arrangements.
to
HyGain at time of original
90
days from
is
in our opinion
by
tamper-
has
to
incorporate such
been
.
Reflector Element
RI
Driven Element
DE
I
10 REF
R2
15
DIR~REF
Director Element
10
Beta
DIR
TRAP
Match/Feedline+
DETAIL
15
DIR~EF
ttachment
Boom
to Mast Bracket Detail
I
I'
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