PS Magazine - JANUARY 1972
PS, The Preventative Maintenance Monthly
1972 SERIES, ISSUE 230
JANUARY 1972
You say the transmit·
ter fixed head on your
AN/GRC-103 radio set
has bee± replaced .
.. and
now you ²a±'t get power
to the transmitter.
Here's a clue tO one
problem that cOuld cause
it: Full scale de³lectiOn of
the
transmitter
p´nel meter .
.. caused by
the ±oµpower load¶
The BaD guy¸ Pi± AL o³ the
J7 jack can't Make contac¹
with
]6 cO±±ec¹Oº .». whIch ¼ea±s 630 vOL¹s ca±½¾
make it ¹o your Type 72¿¿ tubes.
Add, or have your suÀport add, enough shims
sO it'll seat righ¹ in the ]6.
To prevent the probleM, transmitter heads, where pOssIBLe,
stay with the same radIo set. Áo±'t shIft 'em around. When you have to
shIft 'em, dOublecheck the connector to be sure it Makes contact¶
Âo¹sa JOes k±ow ¹hat a± extraÃharD
¹Ur± ca± s±ap thĹ lOngÃÅıdled PÆÇÈ
ÉWRsÊI¹ch O± ¹he AÈ-3349/ËRCÌÍ06Î
ÄMÏlIfIer.
Ðu¹ cer¹Äi± Ñoes stILL Do±Ò¹ k±OÊ ¹Åa¹
tÅe saMe kind of tuº± ca± frac¹uºe ¹he
fIbergLass ĺM i± aMplifIers ¹hĹ have the
shOrt-ha±dleD swI¹cÅ.
SOÓ reMe¼Ber: ÁO a gOOd ¹ur±.
4
Has the RT-6Ô2 azimuth counter of
your AN/PPÕÖ×A radar set Øot in a j´m
lately?
Ùf so, get it Úeplaced, because chances
are good that your azimuth readinØs on
all targets are wrong.
Âike, if the counter j´ms .
.. and moVes
on .
.. Ûhe counter clutch slips. And you'Ve got loss of azimutÜ alinement. Which
means your set has to be realined and the coÝnter replaced.
ÕoÞcheck azimÝth cOVeraØe at the contrOl inßicator at least àwice durinØ a mIssio±
and at the end of the mission.
To check, you'Ve gOt to know áour
sector coverage limits. The target aziâ
muth should
b
within these limits .
..
and the azimuãh position on your
B
scope
shOuld agree with your azimuth counter
reading of the tarØet.
DOES ±
SCOPe i-:.²
AGREE?
You might also check the azImuth readInØ on your receiVer-transmitter wäth that
on the Cå. Ùn any case, lOss of azimuth alinement is a problem for yoær suppOÚt
çople to handle.
Whe± you're MovI±' your cased AN/
ÉRS-4 Mine De¹ec¹or se¹, keep tha¹ case
away froM sharp cor±ers a±d bulges.
Ùt's a goOd Metal caseèit shields the
de¹ec¹or frOm blows a±d wOesèbut i¹ ca±
be daMaged.
é±d
b
ex¹ra careful wItÅ those 6 latches. êf they're Be±¹, broKe± Oº lost, thE
set's left ope± ¹O daMage. ëOu have ¹o replace ¹he la¹ches By ca±±IìalIzatio±.
³1
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