Hy-Gain TH5 User manual

Broadband
Model TH-5MM
Instruction
Manual
Hy-gain
308 Industrial Park Road
Starkville, MS 39759 USA PH: 662-323-9538
FAX: [phone]

TABLE OF CONTENTS
C
HAPTERI Page
General Description ....................................…………...............………………………………...1
S
p
ecifications ...............................................…………………………………………….............1
CHAPTER 2
CHAPTER
Assembly of the Boom-to-Mast Bracket and Boom ...............……………………................ 5
Assembly of the Element-to-Boom Brackets on the Boom ............………………….......... 6
Installation of Tubing Clamps ....................…………………………………............................ 7
Element Assembly ........................……………………………................................9
Front Driven Element .......................………………………………………….............................9
Rear Driven Element .........………………………………...........................................9
10 Meter Reflector Element …………………………………………………………............... 10
15-20 Meter Reflector Element .....................…………………………………...................... 10
10-15-20 Meter Director Element .................……………………………….......................... 12
CHAPTER 4
Installation .........................................………………………………………………..................19
Installation On a Crank-Up Tower ...........……………………………................................ 19
Attaching the Antenna to the Mast ..........……………………………….............................. 19
Other Types of Towers .......................……………………………………...........................19
Lightning Protection ..................................................... 20
Attachment of Feedline ..................................................20
VSWR Curves .........................................................20
CHAPTER 5
Operation .............................................................23
CHAPTER 6
CHAPTER 7
CHAPTER 8

LIST OF ILLUSTRATIONS
Figure P
1 Boom-to-Mast Bracket ..........................................
2 Assembly of Boom .............................................
3 Element-to-Boom Bracket ........................................
4 Tubing Clamps.................................................
5Trap Detail.…………………………………………….................................................1
Detail A - Detail - Measuring Point
Trap .………………………………………………………………………...................... 1
6 Element Assembly and Antenna Dimensions ....……………………….................... 1
7 Rope Dampener ........................………………………………………........................1
8 Overall View of Beta Match and Phasin
g
Tubes
9 Beta Match Assembly .....………………………………………………………………...1
10 Pigtail to Rear Driven Element ...............………………………………..................... 1
11 Pi
g
tail to Balun Connection and Front Driven Element .....…………………............ 1

CHAPTER 1
The Hy-Gain TH5/MK2 is a 5 element, three band beam antenna designed
for broadband, high performance operation on the Amateur 10, 15 and 20
meter bands. Broadbanding is accomplished through the use of two fully
trapped driven elements. Stainless steel hardware and clamps are used on
all electrical connections. Hy-Gain's 50 ohm BN-86 balun and preformed feed
straps are supplied. The antenna is designed to fit masts from 1.9" to 2.5" in
diameter and can be rotated with Hy-Gain's CD-4511, Ham IV or T2X
! ri I
Frequencies of Operation: 20m
Under 2:1 VSWR
(
MHz
)
..................... 14.0-
15m 10m
21.0-21.45 28.0-29.4
Under 1.5:1 VSWR (MHz).................. 14.09-14.32 21.11-21.45 28.25-
Front-to-Back Ratio (dB) ........................19 +/-5 22+/-5 19+/-5
Average 1/2-Power Beamwidth (deg).... 67 66 66
Maximum Gain
(
dBi
)
..............................7.8 8.0 9.0
Maximum Power .................................... Maximum Legal
Lightning Protection ............................... DC Ground
Mechanical
Boom Length..................................................................................19 feet (5.8
m) Boom Diameter..........................................................................2 inches
(5.1 cm) Longest
Element..............................................................................31' 6" (9.6 m)
Longest Driven Element ` (one-half total length)
....................................................... 20m - .183 wavelength 15m -.206
wavelength 1 0m - .227 wavelength

Specifications Mechanical (Cont.)
(Cont.) Turning Radius ..........................………...................................................18'5"
(5.6m) Accepts Mast ..........................1.9" to 2.5" O.D. (50 mm to 63.5 mm)
Net Weight.........................................................…................ 57 lbs. (25.8 kg)
Maximum Wind Survival .................................................100 mph (161 kmph)
Effective Wind Area ........................…...............................7.4 sq. ft. (0.68 m)
Effective Moment*.......................................................1050 ft. Ibs (144 kg-m)
Wind Load at 80 mph .............................................................190 lbs. (86 kg)
Element Tubing Clamps.......... ........................................ All stainless steel
Hardware ............................... Stainless steel, except for boom-to-mast bolts
Suitable Rotators ..................…..................Hy-Gain CD-4511, Ham IV or T2X
'Projected Area (elements) .................................... 10.1 sq. ft. (.94 sq. m.)
(boom) .............................................3.2 sq. ft. (.30 sq. m.)
*Effective moment is defined as the product of the antenna weight and
turnin
g
radius.
•Projected Area is the actual (flat) projected area of either the elements or
boom (highest value) without any shape factor included. This area may be
used with EIA/TIA-222-D and later versions and with the UBC formulas to
determine tower and mast loading. On HF beams, the element area is
usually higher. On VHF/UHF beams, the boom area is usually higher. When
stacking HF and VHF beams, use the element area of all beams at their
attachment points to determine loading at zero degrees to the boom axis.

CHAPTER 7
FOR OUR OVERSEAS CUSTOMERS: The United States uses English units
of measurement. Please see Parts List in back of this manual for assistance
in identif
y
in
g
the hardware and components supplied with this product.
Choose a large, clear area to assemble the TH5/MK2. The area must be at
least 19 ft. x 31 ft. 6 in. (5.8 m x 9.6 m). You may wish to use sawhorses or
chairs to support the boom during assembly. A concrete driveway is an
excellent area for assembly. If you assemble this antenna over a grassy area,
precautions should be taken so that hardware is not accidentally lost during
TOOLS: The followin
g
tools are re
q
uired for eas
y
assembl
y
of the TH5/MK2:
Qt
y
T
yp
e
1 Tape Measure, 12 foot
2 Adjustable Wrench, 8 inch
1 Nut Driver, 7/16 inch
1 Nut Driver, 3/8 inch
1 Nut Driver, 5/16 inch
When unpacking your antenna, check inside of all tubing for parts (traps,
smaller tubing, etc.). To conserve space, these smaller articles are sometimes
put inside larger pieces. Check all parts against the Parts List to make sure no
parts are missing. The hardware supplied with this antenna is bagged by
thread size for
y
our convenience.
All tubing supplied with the TH5/MK2 telescopes together. Make all
measurements to the
g
iven dimensions
,
p
lus or minus
,
no more than an 1 /8
The assembly of this antenna will be easier if you read this manual completely
through at least three (3) times before beginning assembly. Allow at least 6
hours for assembl
y
. Double and tri
p
le check ALL dimensions after assembl
y
.
NOTE: An extra Figure 6 has been inserted in this manual for use when
assemblin
g
the antenna.
The position of the elements onto the boom begins at the center of the
antenna and progresses outward. Followthe instructions as outlined on page
5 and referto Fi
g
ure 6 for assistance.
-3-/
(
-4-
,
blank
)

Assembly of the
Boot-to-Mast
Brackets and Boom
Item Item
No. Description No. Description
16 Bolt hex head
,
5/16"-18 x 5" 35 Nut
,
hex
,
1/4"-20
17 Bolt hex head, 5/16"-18 x 3' 36 Lockwasher, internal, 1/ 4"
18 Bolt hex head, 5/16"-18 x 2 3/4' 52 Caplug, 2'
19 Nut,hex, 5/16'-18 59 Mast Bracket, cast aluminum
20 Lockwasher, split, 5/16" 65 Tube, Boom, swaged, 2" x
23 Bolt hex head
,
5/16" 66 Clam
p,
Boom-to-Bracket
31 Bolt hex head, 1/4"-20 X 3/4" 67 Bracket, Casting-to-Boom
Select the boom-to-bracket damp parts (Item Nos. 66 & 67). Loosely
assemble them on the boom ends (Item No. 65), as shown in Figure 1. Line
up the holes on both brackets and both boom ends. Secure the two brackets
together with four (4) 1/4"-20 X 3/4" bolts, lockwashers, and nuts. Secure the
brackets to the two boom ends using the 5/16"-18 x 2 314" bolts,
lockwashers, and nuts. Tighten these six (6) bolts securely. The use of heavy
motor oil on stainless steel threads will prevent galling of threads.
Assemble the two cast aluminum brackets (Item No. 59) on the mast at the
desired height above your tower. Secure the two brackets together using the
two (2) 5/16"-18 x 4" bolts, lockwashers, and nuts. You may wish to drill a
hole through your mast so that the remaining 5/16"-18 x 4" bolt may be
inserted through the cast brackets and the mast and tightened. This bolt will
prevent the antenna from twisting on the mast in high winds. See Figure 1.
The four (4) 5 inch bolts will be installed when the antenna is installed on the
Slip the two remaining boom sections (Item No. 57) over the two swaged
ends of the assembled boom and secure using (2 each) 1/4"-20 x 2 1/2" bolts,
lockwashers
,
and nuts as shown in Fi
g
ure 2.
Figure 1 Boom-to-Mast
Bracket
CHAPTER 8

Assembly of the Front Driven Element -
Element-to-Boom Select one pair of the largest element-to-boom brackets (Item No. 62).
These are
Brackets on the marked with a number 14. Assemble the brackets on the boom 35 inches to
Rear Driven Element -
Select another pair of the largest element-to-boom brackets (Item No. 62).
Assemble these brackets on the boom 20 inches to the right of the center of
the mast bracket. Refer to Fi
g
ure 3. DO NOT ti
g
hten the bolts at this time.
10 Meter Reflector
-
Select a pair of the smallest element-to-boom brackets (Item No. 60). These
are marked with a number 4. Assemble these brackets on the boom 531/4
inches to the right of the rear driven element brackets. Refer to Figures 3 and
6. DO NOT tighten at this time.
10
-
15
-
20 Director and 15
-
20 Reflector
-
Select two sets of medium sized element-to-boom brackets (Item No. 61) and
loosely assemble these on the boom ends. The front set should be 68 inches
to the left of the Front Driven Element brackets. The rear set should be 36
inches to the right of the 10 meter reflector brackets. Refer to Figures 3 and
6. DO NOT ti
g
hten now.

Installation of
Tubin
g
DRIVEN ELEMENT DETAIL
Item
No. Description No. Description
Bolt, hex head, '/."-20 x 3/8 " 36 Lockwasher, internal, '/,"
Bolt, hex head, Y."-20 x 3/4" 56 Insulator, Driven Element
Nut, square, 1/4" - 20 60 Bracket, Element-to-Boom, #4
Nut, hex, '/."-20 61 Bracket, Element-to-Boom,
62 Bracket
,
Element-to-Boom
,
2
9
3
1
Figure 3 Element-to-
Boom Bracket
Select the proper size tubing clamp as shown in the chart When
installing the clamps, place the clamp near the tube end with the top of
the clam
p
over the slot in the tube as shown in Fi
g
ure 4.
After adjustment of the tubing lengths, tighten the clamp with a 5/16
inch nut driver, socket, or open end wrench until the tubing will not
twist or telesco
p
e. DO NOT OVERTIGHTEN.
REFLECTOR
-
DIRECTOR
AO
-
393S
-
B
-
010