o
rrut
I
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
PN 801235
,n,electronics
DIVISION
OF TELEX
COMMUNICATIONS, INC.
,wSrRUCTtOrv
ORDER
NO.
388
TH3.
MK3
THUNDERBIRD
3-Element, Ham Antenna
MANUAL
General
DescrlPllon
$peclfications
Preparation
ol Assembly
*
{-r\i
FOR
OUR
OVERSEAS
CUSTOMERS:
The
UnitedSates
uses En0lish
units of
measurement Please
see
the last
page
of this manualSassistance
in identifying
the
hardware and
components supplied with
this
prodbct
.
:i'..
;:i
.Et
4i
s
The
Hy-Gain
TH3-Mk3
is
a
three-d.iement
tri-band beam antenna
designed for operation
on
10, 15
and
20 meters. Multi-barlding is
accomplished through
the use of Hy-Gain's
all
Hy-Q
traps.
The
antenna is desig$ed to fit
a 1s/e"
(41
mm) O.D. mast
and can
be
rotated
with
a heavy
duty TV
rotator.
F
:
t
"r
$
Ebctricat
Inputimpedance.
:.....$.........
Gain.
..::::::.::f::::::::::::::::::::::::::::::::::;;it,i?"l*tr
Front-to-backratio
.....ft.:
....25d8
Maximum
power
input
. .i....
.....
1 kw AM
VSWR
(at
resonance)...
... ....t
Lightning
protection
....
t:
DC
ground
f
f;n
l;
Mechanical
B::il:l#$";
::::::::::::::g::::::::::::::::::::
:::::::::::
'11,11?3,Til1
Longest
element
.....:.9....
....2i
ft.
(823.7
cm)
Maxrmum wino
survivat.......&....
..r...
.... 100 mph
(160.93
kmph)
Net
weignt.
Accepts
mast.
. .i.Fr,
.
.
.11A" lo 2V2"
O.D.
(32
mm
-
64 mm)
Wind
surface
area
.......}]
...5.10 sq.
ft.
(0.474m2)
Wind
load
at B0
mph
...#.
t
-i
I
i
ft
(.r
The
antenna site should
Oe treeiOt large
buildings, metal
objects
or
powertines.
wARNtNc
'
i1
'',-'
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.
n
A0-0388-C-OO2
Assembly
ol
the
Boom
WARNING
When
Installlng
your
system,
take
extreme
care
to avold any contact
wlth
.
overhead
powerllnes.
Falture
to
exerclse
thls carc
could
resull ln
serlous
or
latal
lnlury.
,t,,1..'"""*-
.,"
.,.,
Figure
1
Flgure
2
CAUTION
When unpacking
your
antenna,
check
the
inside of all
tubing
for
parts
(clamps,
insulators, smalter
tubing,
etc.).
To
conserve
space,
these
smaller
articles
are
sometimes
put
inside larger
pieces.
Select
the
boom-to:bracket
clamp
parts (items
2 and
3). Loosely
assemble
them on the
drilled
ends
oi the
two boom
sections
(item
8) using
the1A"'20
x
3/a"
bolts and
the
7a" nuts
and
internaf
lockwashers.
Secure
the boom
to
the bracket
using
the two
sh.a"-18x23/0"
screws,
nuts,
and
lockwashers
provided.
See
Figure 3.
$r
ao-0388-8-OlJ
:
dDoule,
,<
('
\g
@
(D
@
@
Flgure 3
-2-
Select
the
cast aluminum
boom-to-mast bracket
(item
1). Align the holes in the boom-to-
mast
bracket
with the holes
in
the
boom-to-bracket
clamp.
Us:e the
s/
'a"-18
x
5"
screws
and the
s/ro"
nuts
and split
lockwashers
to
join
the bracket and
the clamp.
See
Figures
4
and 5. Do not
tighten
the
screws at this time.
The
bracket
must
be
loose
to enable
you
to
mount
the
antenna
to the
mast.
BOOM.TO.MAST
BRACKET
AO-0388-B-014
Figure 4
NOTE: The
boom-to-mast brackets have
a
hole
thrcugh
their
centers to allow securing
to the mast with the
5
/ rc"-18
x31/2" bolt. lt is recommended
that the mast
be
removed and
an11
/32"
hole
be drilled at the desired mast
clamp
position,
then reinstallthe mast.
lf
this
is
not
possible,
the
clamp
will
hold
its
position
on the mast in all
but the
most severe
weather
conditions.
tr-18 r 5' 8oLT. LocKwasHEn ail
tur
(tr9tcot
4
Dtocaa )
casT
Alutttlx
ARACKETS
-a-6
?6-18r2t'
rcLr,
LocKwAsrER o.d
NUT
BOOX-TO'SRACXET CLAIP
$.-rBr!h'!olt,
LOCIWASXER od XUT
(O9lloml
d 16.
tro&cta,
1.-[r
3Yt' 3o!T,
-
locxwlsaEn.nd NUT
(
Irplcol 2
ploc..
t
-@-o,li
Figure
5
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L-
k-zo'1,'eorr.
LocKw sHER od rur
(
ltplccl
4
,locat
)
CASTING
-TO.8OOT
CLAilP
IAST
(Suppli.d
!r
curroil..l
Element-to-Boom
Brackels
Select
the element-to-boom
brackets
and
insert
lhe
%"-20
xVe"
anchot screws and
1A"
nuts
as shown
in Figure
6.
ELEMENT
TO
EOOM
BRACKET
Figure 6
Lciosely assemble the larger
element-to-boom brackets
and
place
them
over one end of
the boom.
Slide
them toward
lhe boom-to-mast
bracket.
This will
be the bracket for the
Driven Element
(DE).
Loosely
assemble
the
smaller element-to-boom brackets
and
slip them over the same
end of
the
boom.
This will
be
for
the
Reflector
element.
See
Figure 7.
Loosely assemble the
remaining
pair
of element-to-boom brackets and slip them overthe
opposite end of
the
boom. This will be for the Director Element.
e
AO-O3E8-C-0t5
DO
NOT TIGHTEN
THESE
EOLTS
UIITIL
LATER
(8
REOUIREO
PER ERACKETI
IVEII
ELEIIENT ERACKET
REFLECTOR
ELETEI{T ERACKET
o
Q
to
Boot
-ro-rrAsr
BRA.KET
Figure 7
-4-
t$:
ORIVET €L€IEf,'
If,SULATOR
MVEN
ELEMENT
DETAIL
REFLECTOR-
DIRECTOR
DETAIL
l,:'<'
_l
Compresslon
Clamps
Use the
compression clamps
in
the
following manner:
Take
care when measuring the
tubing
lengths
for
your
mode
of transmission.
Place
the clamp
near
the end of the tube
with
the
joint
even with the
slot.
Tighten
the clamp untilthe
inner tube cannot be turned
in
the outer tube.
One-half to
three-quarters further
turn on.the compression
screw
will
provide
a
secure
electrical
and mechanical
connection.
During the readjustment
or
disassembly
the tubes can
be separated
by
removal of the
clamp.
The tubes
can lhen
be
separated
and
the compression
clamp
reinstalled,
CAUTION
Do not
overtighten the
compression
ctamps.
NOTE:
To
save time, loosely
assemble
all of the compression clamps.and their
appropriate hardware
before
beginning further
installation of the antenna.
rA-oooo-A-oot
L-
#
)
--tt
.l
-rrj
to-lu'
HH BoLT
#IO
SQUARE NUT
#la
rFro-tli'HH
BoLT
i'f
IO
SQUARE
sLoT
rx
PtP€ lltct|€o
w|lH
--
c€rtER
of cLAxP
OPEilIXG
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BoLT
I
SQUARE
NUT./
COMPRESS
ION
Figure
-5-
#lo-l"HH
CLAMPS
-..,:--::---.=
--i--Ttn3m$sJon
Modes
Assembly
of
the
Rellector
Determine which
mode of
transmission
you
will
use-either
phone
or continuous
wavei:
(C{).'Dimensions
for both are
shown,
liut only one
mode
must
be
used
throughout ths:i.
assembly of
the
antenna. Trying
to Use'phone
dimensions on one band
and CW*;,1"
dimensions on
another band will
give
less
than optimum results on
both.
The typical
VSWR charts shown
in Figure
9
will
help
you
to decide which mode is best
for
your
use.
AO-0388-A-OO5
VSWR
CURVES
These
VSWR curves
are typical for
this
antenna
mounted 70
feet
above the
ground,
horizontally
polarized.
Similar
curves can
be
expected
for this
antenna
mounled
belween 30 and 100 feet above
the
ground.
DO NOT
TRY TO TUNE
THIS
ANIENNA
FOR
LOW VSWR AT GROUND
LEVEL.
tttor".
r*to#t"o*r,'tto
Figure
9
NOTE: The
following steps cover assembly of only one side of
the
antenna,
They will
have to
be
done first
for
one
side
and then
reoeated
for the other side.
Check to see that all the element-to-boom brackets
will
lie
horizontalwhen
the
antenna is
mounted on
your
mast. Do this by observing the
position
of the element
with
respect
to the
boom-to-mast
bracket. lv4ake any adjustmenis
necessary,
keeping the center of
the
bracket 2/a" lrom the tip
of
the
boom
then tighten the anchor
screws
securely.
Select f
he R1
section of tubing
(1%"
x 48",12L9 cm long, item 4). Slip
a
1 %'compression
clamp
onto the
R'l
section.
Refer to Figure
L
Select the R2 section
(1/e"
x 48",121 .7
cm
long,
item
7). Slip
the
unswaged
(untapered)
end
of the R2 section
intothe
R1 section and
measure
dimensions
B for
your
mode of
transmission
(phone
or
CW)
as shown
in
Figure
10
then
tighten the
compression clamp slightly.
CAUTION
There are two kinds
of
1 5-meter traps. Part
No.878694
is
a
parasitic
trap that
is
used
in the
Reflector
and Director.
Part
No. 878637
is
for use
on
the Driven Element.
i.,
i"r
zl'
B
Figure 10
Reflector
I
NOTE:
Install all the traps with drain
holes
on
bottom
and
make sure lhe
part
number end
is
toward the boom.
2.O
t5
t.o
2.O
ft
FJ
iir,
j"
$
:
#
f)j
.{
:.!
l
L-."'t,.,-"-,
I
ti
F.a'll2l-r.il+
A
ttco$rcd 03 Siorn.
Detall
:-.1-+--.:..---,-,-
-6-
@
(c
Assembly
of
the
Driven
Element
Slip a 1
"
compression
clamp
onto
the
swaged
end of the R2
section. Select the 10-meter
trap
(item
16),
and
slip the
shorted
end into
the
R2
section. The
shorted end can be
identified
by the
part
number
marking near
the
plastic
insulator.
Measure
dimension C
f-or
your
mode
of
transmission
as
shown
in Figure'10.
Make
certain
lhe drain
holes in
the traps
are facing
downward,
CAUTION
Be sure
you
instatt
the
traps
corre6tty.They wilt not
operate
property
unless lhe
shorted
end
is facing
towards
the
boom.
Slip two 1"
compression
clamps onto the
R3
section
(1"
x 5",
12.7
cm
long, item
13). Now
slip the R3
section
over
the
1O-meter
trap
and slip
the
shorted end of
the 1S-meter
parasitic
trap
(item
15),
into
the R3
section.
Make
certain the shorted end of the trap
(identified
by
the
part
number)
is inserted
into
the
R3
section. Measure
dimension
D for
your
mode
of transmission as shown in
Figure
'10,
keeping R3 section
approximately
equidistant
from
the
two
traps.
Make
certain
the drain
holes in
the trap are
facing
downward. Now
tighten all
compression
clamps
slightly.
Slip
a
Vz"
compression
cla;rip
over the
swaged end
of the
1S-meter
trap. Select the R4
section
(7/rc"
x
28", item
11)and
slip it intothe
15-metertrap. Measuredimension
Efor
your
mode
of transmission
as
shown in
Figure 10,
then tighten
compression
clamp
slightly.
Carefully
recheck all measurements
and make
certain the
shorted end of all
traps
are
pointed
towards the
boom.
Now
tighten all
compression
clamps as
explained earlier.
Remember
not to
overtighten them. Make
sure all
drain
holes
are facing
down.
Slip
the
Reflector
e-lement
into
the bracket
assembled in the
boom.
Tighten
the screws to
hold
the
R'l
section
securely but do not tighten
the anchor
screw
(item
25) at this time.
Select the DE1
section
of tubing
(1/q"
x 48",121.9icm
long,
item 4). Slip
all/a" compression
clamp
over
the DE1
section. Select the DE2
section
(1Va"
x
38", 96.5 cm long,
item
9). Slip
the unswaged
end of the DE2 section into
the DE1 section
and measure
dimension
G for
your
mode
of tran.smission
as
shown
in Figure 11. Now
tighten the compression
clamp
slightly.
ORIVEN ELEMENT
Oaz,tt'19-
a,
U,
..'
H@
Figure 11
Driven
Element
Slip a
1
"
compression clamp
over the
swaged end of
the DE2 section.
Select
the
'l
0-meter
trap
(878649,
item 1
6) and
slip
the
shorted end
(identified
by the
part
number)
into
thepE2
section. Measure
dimension
H for
your
mode of transmission
as shown
in
Figure
1
1
.
Make
certain
the drain
holes in
the trap are facing
downward.
Now tighten the compression
clamp
slightly.
aa\'ttaz
{F
Slip two
1''
compression clamps
overthe DE3 section
(1"
x 6", 15.2
cm
long,
item 12). Now
slip the DE3 section over
the 1O-meter trap then slip the
shorted end of
the 1S-meter
Driven Element trap
(878637,
item
14)
into
the DE3 section. Make
certain
the
shorted
end
of the trap
(identif
ied
by
part
number)
slipped into
the
DE3
section. Measure
dimension
1
for
your
mode of transmission
as shown in Figure
11
,
keeping
the
DE3
section
approximately equidistant
from
the
two
traps. Now
tighten
the
compression
clamps
slightly.
Slip a Yz" compression
clamp
over
the swaged
end of the
1S-meter DE trap. Select the
DE4
section
(7
/
ra"
x
28", item
1
1
)
and
slip it into
the swaged end of the 15-meter
DE
trap.
Measure
dimension
J
for
your
mode
of transmission
as shown
in Figure 1 1 then tighten the
compression clamp slightly.
Carefully recheck
all measurements
as shown in Figure 1'l and make
certain
that the
shorted ends of the
traps
are
pointed
towards the
boom and
trap
drain
holes
are
facing
downward. Now
tighten
all compression
clamps
securely.
Slip the insulated
end of
the tjriven
element
into the bracket assembled on
the boom.
Tighten
the screws to hold
the element
securely but do nol tighten the
anchor
screw
(item
25) at this time. Refer
to Figure 6.
Check to see that the Driven
Element
will lie in
the same
plane
as
the Ref lector and
make
certain it
is still 723/n"
(184.8
cm)
from the
center of
one
bracket
to the
center
of the other.
Now
tighten the
anchor screw
securely.
Select
the
D1
section of tubing
(1%"
x48",121.9
cm
long, item 4).
Slip a
1 /n"
compression
clamp over the D1
section.
Select
the D2 section
(1%"
x38",96.5 cm long, item 9). Slipthe
unswaged end of D2 into the D1
section and measure dimension
L
for
your
mode of
transmission
as shown
in
Figure 12.
Now
tighten
the
compression clamp slightly.
(o
Assembly
of
the
Director
oa,
'4j
r 2a'
t5-rET€i
t6!,!
{6t-5
2!'tr.r6'
f-
ll'(D.t@l
F
Lo
(3r
Figure
12
Director
Slip a
1"
compression
clamp
over
lhe
swaged
end of D1 . Select the
10-meter
trap
(878749,
item 16)
and slip the
shorted
end
(identified
by the
part
number) into the D2
section. Measure
dimension
M
for
your
mode
of
transmission as shown in
Figure 1 2. Make
certain the
trap
drain holes
are
facing
downward,
then tighten the
compression clamp
slightly.
Slip two
1
"
compression
clamps
over
the D3 section
(1"
x 6", 15.2
cm long,
item 12).
Slip
the D3 s,ection over the 1 0-meter trap,
then slip
the shorted end of the 15-meter
parasitic
trap
(878694,
item
15), into the D3
section.
Make
certain the shorted end of
the trap
(identified
by the
part
number) is inserted into the D3
section.
Measure
dimension
N for
your
mode
of transmission as
shown
in
Figure
12,
keeping
D3 approximately equidistant
from
the
two
traps. Now
tighten
the
compression
clamps slightly.
'01,
t"
a'
E.llf
r$'-
-Dl.tt'.4'
o32
6
rqr
{5h
qr
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flzr.hEr
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crpt-uc
XOTE:IIISTALL ALL TRAPS
WIIH
DRAril HOLES Ot{ BOT'OM
t
ilA(E CERTAIT{
PART }{Uil8EN
END
ts TowARo
800rr.
Slip
a
lz"
compression
clamp over the
swaged
end
of the 1S-meter
trap.
select
the
D4
section
(7ha"
x28",71 .1
cm long,
item 1 1
)
and
slip
it into
the
swaged end
of
the 1
S-meter
trap.
Measure dimension
O for
your
mode
of transmission
as
shown in Figure
12
and then
tighten
the compression
clamp lighily.
Insert
the
Director
Element into the bracket
hssembled on the boom. Tighten
the screws
to
hold
the
element
securely but do not
tighten
the anchor screws
(item
25)
at this
time.
ELEMENT.
TO.
8OOil ARACXETS
ISEE
FIGURE 4}
Eoon
sEcilo[
2' r 84'
(213.4cn
long)
9l?a'ti!J.ocn)
CENTER
-TO.CENTER
G
FRONT
7,""
capr-uo
le"
capuud
BOOM.TO.MAST
BRACKET
ER DRIVEil
ELEMENT TRAP
IO.METER
TRAP
RF
CHOKE
LEAOS
(SEE
FIGURE t4)
{DETAILS A 8 B)
DRIVEI{
€LEUENT
COMPRESSION
CLAt,,tPS
EETA
MATCH
(SEE
FIGURE I4I
BOO|'
SECTtON
2' r 84'
(213.4cn
longl
lzU.'llg4.Bc6l
15.f,ETER
PARASITIC
TRAP
IO-METEi
TRAP
REFLECTOR
COMPRESSION
CLAMPS
Flgure
13.
Overall
Vlew
Carefully
recheck
all
measurements
as shown in
Figure 13. The driven
element should
measure
723/n"
(184.8
cm) from
the
center
of the
ref lector
element-to-boom
bracket to the
center
of the
driven element{o-boom
brackel as shown in
Figure
13. The
director should
measure
913/o"
(233.0
cm) from
the
center
of the
driven element{o-boom bracket to the
center
of the
director{o-boom
bracket.
Make
certain
that
the
shorted
ends
of the trap are
pointed
towards
the boom
and
the
trap
drain holes
are
facing downward. Nowtighten
all
compression
clamps
and
anchor screws
securely.
-9-
I
)
I
-i
'.4
e'
tG:::
lnstallation
of
the
Beta Match
FinalAssembly
ORIVEN ELET€NI
Select the beta match
tubes
(%"
x 46",
116.8 cm long,
item 10)
andthe beta support
insulators
and clamps
as shown in
Figure
14
and DetailC &
D. Assemble the beta match
tubes in
the boom as
shown
.in
Figure 14
and Detail C & D.
Select
the beta match
shorting
clamps
and the
shorting strap and assemble as shown in
Figure
14
and Detail
D. Notice
that
the
#10-24
x 1 l/2"
screw attaching the shorting clamps
to
the strap has
a sleeve
slipped
over it. This
allows
you
to
install
the shorting clamps
without
putting
undue
strain
on
the beta match
tubes.
Install
the
pigtail
assemblies (item
55) on
tne
Oeta match tubes using the two
#10
screws
(item
32) and
lockwashers
(item a2).
Slip lhe
1t/t" tubing clamps on the Driven Element
near
the insulalor.
Loosely
attach
the
pigtails
to
the tubing clamps using the
t/n"
-20
x 11/2"
screws as shown
in Figure
14.
Do not
tighten
the eonnection at
this
time.
The
coaxial
feedline
will
connect
to
this
point
in
a later
step.
***;
.r'
SEAL WITH NEOPRENE.
PLY-O-8OND
OR OTXER
SEALANT.
ao-o388-A-OlO
AO-O188-A-O09
to t7j'(3.ecm)
CLAMP
RF
CHOKE 5"
(
15.2
cm
t
INNER
DI/IMETER,
r2 TURNS
OF RG
g/U
OR
HY.GAIN
STRIP COAX
FOR
C}IOKE
AS
SHOWN
DETAIL B
AO-OS8.A-ql
Place
a
7/,0"
caplug
on
each
element
DETAIL D
tip
and a
2"
caplug on each
end of the
boom
Install
a
Hy-Gain
balun Model
BN-86,
available at
your
local
Hy-Gain
dealer. The
BN-86
will
allow the
TH3-Mk3
to
operate
with
a
greater
efficiency than
is
possible
with
a
"home-
made"
choke.
lf
your
wish,
you
may wind
yourself
an RF
choke.
The
choke
consisls of
12
turns of
RG-
8/u
coaxial feedline with
6"
(15.2
cm)
diameter. strip one
end of the
choke as shown
in
Figure
14
and
Detail B
and connect
to the
tubing
clamps
on the Driven
Element.
Tape the
choke
securely
to the
boom
and
weatherproof the
connection
to the
Driven Element
using
Pli-O-Bond,
Neoprene
or some similar substance.
o)
Qi'
@
I
@
I
DETAIL
C
DETAIL
A
-10-
Parl No. Dercrlptlon
otv
102734 brackel, cast
aluminum
...........2
172732 clamp,
boom-to-bracket.
.......... 1
172735 bracket, casting-to-boom.
. .
. .
. . . . .
. . . . . . .
.
1
190900 R1,0E1,Dl,1%"x48"..
.........6
165919
bracket, element-to-boom;
#13
............ 4
165920
bracket, driven
element-to-boom, fl14
......2
190300 R2, 1ya" x48"swg7/e"....
........2
178411 boomsection,2"x84".
...........2
190307 De2,D2,11/a"x38"swg/a"
.......4
171142 beta rods,.%"
x
46"
. .
......
2
178558 D4,DE4,R4,7/16'x28"
..
.......6
190606
03,DE3,1"x6".
........4
190607 R3, 1" x
5" . .. ..
......
....
2
878637 lrap,
1S-meter
driven element .............2
878694 lrap,
ls-meterparasitic
...........
4
878749
trap, lo-meter
......
.... .
6
879894
Parts Pack
A .....
....... 1
879231
Parts Pack
B
.....
....... 1
872089
Parts Pack
C
..
...
.......
1
Parls
Pack A,
879894
171131 betamatchshortingsleeves,
......1
502898
il10-24x
1" hex head
screw ..............6
501541 screu
5/t6"-18x3Ya"
hex
head...........
3
501543
screw, 5/16"-18
x
5", hex
head...
......... 4
506325
screw,
%"-20
x
3/q"
hexhegd...
...........
28
505540 scfew,
%"-20 x
%" hex head...............
6
506335
screw,
%"-20
x 1Yz" hex
head
.............
3
506440
screw,
#10-24
x13/"
round
head...
,.......4
500095
screw,
#10-24 x
1%"
hex head
. . .. ..
.....25
lo-oltt-c-ooa
SEE GTAIL
O
sE€
o€t^tl c
Pari No.
Dercrlpllon
Ary
506485
.
screw,
#10-24 x
%" round head.
. . ... ......
2
506741
screw,5/16"-18 x23/c" hex
head...
........2
(not
applicable)
516470
screw,
f10-24
xy2"
Wpe
A ..... ..,........2
(not
applicable)
555362
nut, #10-24
square .
..... 30
556945
.nut,
5/16"-18 hex .. ..
............
I
556960
nut.
y."-20
hex
.... ....... 34
556970
nut, #10-24
hex .....
......
9
558685 nut,
y1"-20
square .
.......
6
(nol
applicable)
567075 lockwasherr
5/1 6" internal
. ..
.
.. ..2
5671 10
lockwasher,
%"
internal
..........
58
567125 lockwasher,#l0internal
.........11
Parls Pack
B, 879231
380284
compression
clamp,Yz"
.,......... 6
380286
compressionclamp, 1"
..........18
380287
compression clamp,
1%"
..... ......
6
168695
tubingclamp, 1U,"....
............2
17'1077
beta shorting
strap, 2"
|D.,...
......
1
171162
beta
shorling slrap,21,"
..... .......2
177888
beta'supportclamp..
....,.2
Parts
Pack
C, 872089
455625
caplug, 2"
... . ......2
455644
caplug,T/16'.
...........6
465595
insulalor.
beta tube
........2
465600 insulator,
beta support ..,........2
465833 insulator,
DE-to-boom
............2
878561
pigtail
assembly......
............2
|Ge4
|
lt'
@
rrr
eoos
{**""*
E
':
i
'''--..-:''
,
Qr
llem
I
2
a
4
5
6
7
8
9
10
1l
12
13
14
llem
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
54
55
15
16
17
18
19
20
21
22
23
24
25
26
zt
28
-1
't
-
ry
{
Converllng
Engllsh
Measurements
to Metrlc
Use
this
scale to identity
lengths
of bolts,
diameters
of
tubes,
etc.
The
English
inch
(")
and foot
(')
can
be converted
to
centimeters
in
lhis
way.
1 inch
(1")=
2'54
cm
1 foot
(1')
=
30.48
cm
Example:
42"
x2.54
=
106.7
cm
c)
;q
'q
.,s
li,
;l
..:
'a.
'z
I'
PRNTEDN U.S.A
Copyrighto 1979 by
Fy-Gain
EleClrooics
Oivision
d
T€LEX
COMMUNICATIO|.IS.
lNC.
All rigils
resewed.
6-791r2140
t*:
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
