PS Magazine - JULY 1979
PS, The Preventative Maintenance Monthly
ISSUE 320
JULY 1979
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You key the AN/VRC-12 series radio and your M60A2 tank acts like iT
±eeds an exorcisT. ²he Turret, main gu± and Tank commander's cupoLa all
move at oncE³vioLentLy.
Chances are, The right exorcisTs fOr Thes´ demons are shielded anTenna
cabLes. ²he word is in a WARNIµG on page 2-137 of ²M 9-2350¶232-10
(Apr 73 ).
_.c-±"²³´
WARNING
.
±
±
ersonnel because of
To avoid mIurmg
P
d
i
or Cupola due
t of the turret an
B
MoveMen
±
interferenCe betweeN t e
to eleCtroM
µ
net
²
1C
s Ste³ and the radio
tUrrEt stab´Hzat10
µ
n
Y·
the
foLlowing
r¶C·iVer¸transM ¹tter
•
B
ºd be taken:
P
r»CaUtions ¼ ou
±
h t RF Cab½e as¼eMbly
l
¾ak¿ Certam t
a
bl
.
Or
SC-C±69013².
Cabl» a¼¼eM
y
per
P
o-<L
!antenna ControlÀÁ and
sC³´µ¶·
's 1 _29
¸
ÂRÃ are in¼talled
ant¿Nna
A
¸
±
.
²28
BÄwn Än ÅGÆ
2³
·
d
As ¼
Ç
that alÈ harN¿¼ses an
´.
¾aK¿ É¿rtaÊN
¼ition¿d
ÉablËÌ in th• tUrr¿t bUstle are Po
RF
nd
sibl¿ froM the
a
ÍÌ Îar a¼ P
o¼
b½
W
hen it i¼
aNt¿nna ÉÄntrol Ca
t·
or harnesses
nÏÉ¿¼¼ary to rÄUte Ca
±
e¼ they ¼hould
aÉrÐ̼ th¿¼¿ ant¿nNa Ca
l
ÑrÄ¼Ì at a ÒÓÔÕÖGr¿¿ an× eØ
Some folks don·T beLieve whaT they
read, tho. ²hey use plain cables.
²hey get tha¸ wiLd tanK reacTion
because their radio signals geT inTo
the TUrret stabilization system.
4
SHieLded
cabLes
co¹TroL
Those
signals. ºhe anTenna RF cable (SC»C-
690731¼ is NS½ 5995¾00¿764¾8877.
²he anTenna conTroL cable (SC-D-
690798) is NSN 5995-00À764-8876.
·Course, even wiTH The shieLd, you
should keep oTher harnesses and
cabLes away as much as possible. If
yoU have to rUn ·em close by, do iT at
an angle to The anTenna cables.
or maÁ
commo gearÂ
²eLetypewriters a±d radio sets are
prime targets Ãor tHe surges you·Ll
geT wHen power isÄ resToreÅ.
±
Ænce electricity returns, wait unTiL
l
-'."
volTage Levels settle back to normal
•
µ
¶
²
befoÇe swÈtcHi±g on gearÉ
²
"
¶
¸¹
Êou·LL
probabLy
have
some
aLi±eme±ts and adjustmenTs to make,
of
but that sure beaTs
Ëncovered battery posTs can be a
prime mover in fires or eXpLosions.
If a piece of metal ToucHes boTh
TerminaLsÌor Touches The posiTive
terminal and cHassis groUÍd at THe
same time³you geT a spark.
Mix That spark wiTh gasoline or
dieseL fumes or
gases from The
baTtery itself, and yoU'll bLow iT.
RUbber terminal
covers,
NSN
2920-00»738»6272, are a cheap inÎ
surance policy. ²Hey fiT all Terminals.
¹5
m
I
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