Hy-Gain QK-710 User manual

MODEL QK-710
"QUAD-BAND KIT"
FOR THE
EXPLORER 14
NOTICE
All rights in this publication are reserved. No part of the pub-
lication may be reproduced in any manner whatsoever
without the expressed written permission of Hy-Gain.

TABLE OF CONTENTS Pag
e
CHAPTER 1
CHAPTER 2
Preparation for Assembly
................................................................................................................... 2-1 Assembl
y
of the
CHAPTER 3
Installation.......................................................................................................................................
...... 3-1 Attachment of Driven Element Support
Ropes.............................................................................. 3-1 VSWR Curves for 30 and 40
Meters 3
CHAPTER 4
Operation
CHAPTER 5
CHAPTER 6
Service Information
............................................................................................................................. 6-1 Parts
LIST OF ILLUSTRATIONS
Figure Pag
e
1Ca
p
acit
y
-Hat Clam
p
2-1
2 Antenna Dimensions for O
p
erations of the Ex
p
lorer 14 at 7 MHz 2-2
3 40 Meter Ad
j
ustment Chart ............................................................ 2-3
4 Antenna Dimensions for O
p
eration of the Ex
p
lorer 14 at 10.1 MHz 2-4
5 10 MHz Beta Match Extension 2-5
6DrivenElementSu
pp
ort Ro
p
es 3-1
7VSWRCharts 3-2
Attachment

CHAPTER 1
Ge
n
e
r
a
l D
esc
ri
pt
i
o
n
The Hy-Gain QK-710 will allow the
conversion of the Explorer 14 antenna to
cover either the 30, 20, 15 and 10 meter bands
or the 40, 20, 15, and 10 meter bands. This kit
will allow the driven element of this beam to
resonate on either 30 or 40 meters with
VSWR less than 1.6:1 at resonance. The 2:1
VSWR bandwidth is typically 100 kHz on 30
meters and 175 kHz on 40 meters.
Stainless steel hardware and clamps are sup-
plied for-all electrical and most mechanical
connections. A driven element support rope is
supplied to help support the additional weight
of the driven element with either 30 meters or
40 meters added. The Ham IV or T2X
Rotators are recommended to be used with the
modified Explorer 14 antenna.
NOTE: Throughout this manual references
will be made to refer to your Explorer 14
manual. Have your Explorer 14 manual handy
during the entire installation.

CHAPTER 4
Preparation for Assembl
y
Choose a large clear area to work on your Ex-
plorer 14 antenna. The area must be at least
14' x 31' (4.27 m x 9.45 m) for the 30 meter
modification or 14' x 43' (4.27 m x 13.11 m)
for the 40 meter modification. You may wish
to drive a 5 foot (1.53 m) length of mast
material into the ground to attach the antenna
to while workin
g
on it.
Check all parts against the Parts List to make
sure no
p
arts are missin
g
.
All tubing supplied with the QK-710
telescopes together. Make all measurements
to the given dimensions, plus or minus, no
more than 1/8 inch! Double and Triple
checkALL dimensions after assembl
y
.
Assembly of the QK-710 for 7 MHz
O
p
eration
Select the capacity-hat clamps (Item 68) and
loosely assemble a set of four (4) clamps onto
each of the 1" x 6" tubes as shown in Figure
1. Center these clamps on the tubes, before
tightening.
Install a #10 tubing clamp at each end of the
1" x 6" tube and insert the 7/16" x 15" tubes
into the capacity-hat clamps. At this time
tighten all bolts used on the capacity-hat
clamp. Place 7/16" endcaps on the ends of the
15" tubes.
Remove the DE-3 (7/16" x 37") and the 1/2"
compression clamps (older system) or the #6
tubing clamp (new system) from the Explorer
14 driven element. Adjust the DE-2 to 37 1/2"
and slide the 15 meter trap all the way into the
DE-2. Retighten these two clamps securely on
both sides of the antenna. Loosen the sleeve-
spacer insulators and the sleeve boom-to-
element brackets and adjust the spacing of the
sleeves to 7 inches.
Figure 1 Capacity-
Hat Clam
p

In addition to the capacity-hat assemblies,
select the following parts:
Assemble these
p
arts as shown in Fi
g
ure 2.
Determine Dimensions "A" from Fi
g
ure
Use the 11/2" aluminum extension straps,
#1024 x 1" bolts and #10-24 hex nuts to
extend the sleeve spacer insulators to 7
inches.
Assemble the element with the drain holes of
the 20 meter trap facing toward the ground.
Also, adjust sections D-3 and D-4 to the
dimensions shown in Fi
g
ure 2.
The beta match will not be used in this con-
figuration, so the beta match assembly from
the Explorer 14 may be completely removed.
This includes Items 21 and 37 (two), beta
shorting clamp assembly, beta support clamp,
and insulator assembly and all other hardware
used to connect these assemblies together.
See Figure 8, of the Explorer 14 manual.
Tighten all clamps and brackets that were pre-
viousl
y
loosened.
Figure 2 Antenna Dimensions for Operation of the Explorer 14
at 7 MHz

If the antenna is to be mounted between 35 and 55 feet above ground, use Line 1. Typical 2:1
VSWR bandwidth at these hei
g
hts is 200 kHz. with a minimum VSWR less than 1.2.
If the antenna is to be mounted between 60 and 80 feet above ground, use Line 2. Typical 2:1
VSWR bandwidth at these hei
g
hts is 150 kHz with a minimum VSWR less than 1.6.
For antenna heights above 80 feet, use Line 2. Antenna heights less than 35 feet are not
recommended.
• Figure 3
Assembly of the QK-710 for 10
MHz Operation
Remove the DE-3 (7/16" x 37") and the 1/2"
compression clamps (older system) or the #6
tubing clamp (new system) from the Explorer
14 driven element. Adjust the DE-2 to 37 1/2"
and slide the 15 meter trap all the way into
the DE-2.
Retighten these two clamps securely on both
sides of the antenna. Loosen the sleeve-spacer
insulators and the sleeve boom-to-element
brackets and adjust the spacing of the sleeves
to 7 inches.

Select the following
t
Assemble these parts as shown in Figure 4. Use
the 1 1/2" aluminum extension straps, #10-24 x
1" bolts and # 10-24 hex nuts to extend the
sleeve spacer insulators to 7 inches.
Figure 4 Antenna Dimensions for Operation of the Explorer 14 at
10.1 MHz

Assemble the element with the drain holes of
the 20 meter tra
p
facin
g
toward the
g
round. Ite
m
Descri
p
tio
Also, adjust sections D-3 and D-4 to the
dimensions shown in Figure 4.
Assemble the beta match extension as shown
in Figure 5. Remove the existing beta
shorting clamp assembly from the Explorer
14 and reassemble it on the end of the
extension, as shown. Replace boom-to-beta
strap (Item 33) with new boom-to-beta strap
(Item 80). Attach the 5 1/2 inch pigtail wires
(Item 83) between the ends of the existing
beta match and the ends of the extension as
shown. Ti
g
hten all hardware securel
y
.
NOTE: THE ENDS OF BOTH SETS OF
BETA TUBES, AT TI-HS LOCATION,
SHOULD BE ON THE SAME VERTICAL
PLANE.
Figure 5 10 MHz Beta Match
Extension

CHAPTER 9
Installation
IMPORTANT Attachment of Driven Element Support
R
opes
The Explorer 14, plus 7 or 10 MHz,
makes a fairly large antenna and requires
some consideration as to how you will
safely get it to the top of your tower.
Allow plenty of room between any power
lines and your new antenna. Installation
of this product near power lines is
dangerous! Also check the rating of your
tower and rotor against the new wind
loading specifications of your modified
Ex
p
lorer 14.
Due to the element tip loading produced by
the large 20 meter traps, we recommend that
you add vertical support ropes to the central
driven element. The ropes should be tied to
the outer ends of the 15 meter traps and tied to
the support bracket attached to the mast. The
support bracket should be at least 5 feet above
the antenna boom. Horizontal support ropes
are not required due to the construction of the
PARASLEVVE driven element. See Fi
g
ure 6.

VSWR Curves for 30 and 40 Meters
These VSWR Curves are typical for this
antenna mounted between 35 and 80 feet
above ground, horizontally polarized. Similar
curves may be expected for this antenna
mounted between 30 and 100 feet above the
ground. DO NOT TRY TO TUNE THIS
ANTENNA FOR LOW VSWR AT GROUND
LEVEL.
NOTE: The VSWR on 20 meters may be
slightly higher than that of the Explorer 14
alone. This is normal.
See the Explorer 14 manual for more
installation hints.
Figure 7
VSWR
Curves