PS Magazine - SEPTEMBER 1984
PS, The Preventative Maintenance Monthly
ISSUE 382
SEPTEMBER 1984
Squad Radios .
.±
Making It CrysTal cl·eaR
Getting the rIgHt crysTls fr your AN /PR±-4 transm²tter and Its AN /PRR³9
receIve´ Is a breeze. YoU mµke Up yoUr own nUmber.
F²rst, yoU know the crystal nUmber Is CR³81 /¶. ±M 11·5820¸549¸12 tells
you that.
Now, tho, yoU H
A
ve to cHoose tHe operat²ng ¹req yoU'll need. Say one w²ll
be 55.
I
0 MºZ. C8 to the ±M tells you that crystal »eQs are
iO.
70 MºZ below
operat²ng ¹reQs. SUbtractIng, yoU end Up w²th 44.40 MºZ (55.10
-
iO±
70).
¼Ow, add 4 Zeros. ±He number yoU Use then, Is CR½81¶44.400000MºZ.
Go to the Master Cross Re¾rence LIst (MCRL) Part
i
w²tH that nUmber.
l'
I
I
±
±he NSN ¹or tHat cr¿stÀl Is 5955Á00³926³2688 .
²-³³³³³³³´³:µ¶·³³³³³¸¹º»¼r
½¾¿ÀÁÂÂÃÂÄ1Å Æ
803
REF NO
FSCM
NSN
ITEM NAME
NS
co-81/U44.IOO±±² ³1H9·S´ss-0µ-´Z6
l UMiT,OU
HZ
C0-1²
¶u¸4¹l±±±±º 8»34¼ ½¾s½¿0µÀ¼zÁ
AL tMi±²OU
Hl
C:;81ÂUÃÄÅƵµµµÇ 8ÈÉ4´ ÊËss•0µÌ´zÁ
.
____
±
_al UMi³,O´
ÍÎÏÐÑÒÓÄÔÕÖµ0×0ØL
1³´49
½ÙssÚ×ÛÜÝÞßÀ2àh
z Z µ
C¶Ysu· UM¸f¹º»
Defense Electronic SuppLy Center
ATT±: D²SC-STE
Dayton, OH
µ5µµµ
Be sUre yoU IÂstall tHe crysÃals so
tÄey straddle tHe cord. ±HatÅll maKe
reÆÇvÈÉ eas²er.
SEP
84
37
2 2 2
CRYSTA³ UNIT, QU
When al²n²ng tÄe sets a¹ter a ¹reQ
cHange, Use only tHe al²nement tool ²Â
tHe
ÊDË1189
cHannel al²neÌeÂt
²nÍ
d²cator. Screwdr²vers ²Â tHe ²nnards o¹
a rad²o can caUse all K²nds O¹ probleÎs.
Same goes ¹Ïr tHe anteÂÂa load²ng
co²l aÂd capac²tors. Ðse oÂly tÄe proÑ
per al²nement tool.
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