PS Magazine - MAY 1985
PS, The Preventative Maintenance Monthly
ISSUE 390
MAY 1985
AN/GRC-103 Radio Set. ±²
Tape Your T-983
The cable receptacles on the back of
your T-983 traNsmitter look the sAme,
·
but they're not.
Forcing the CX-10762 power cable
onto the OW (order wire) receptacle
will zap your 5TR1±5 AmplifIer mon²³
tor panel.
Head o´ this revoltin' jolt²µ' by
putt²ng a small piece of colored tape or
a touch of paint near the 115 V±C
receptacle. Put another on the cable.
Then when you connect the cable,
keep the colors together.
You can get a roll of tape ¶r this job
·
w²th ·S· 7510¸00-550¹7126.
ºf you thi»k a bad connection has
already been made, make the r²ght one
and test ¶r damage. With the radio
on, turn the T-983's input control knob ¼lly counterclockwise to LOW. Set the
meter switch in the 12 C½ PCM, 24 C½ PCM and FDM positions. ¾f there's
a meter readinG in any of these settings, the panel is damaged and yoU¿ org shop
has to replace it.
•
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fRANSMITtEr
BanD
I
46
MAY 85
CX-³076³ Cable ²´µ
HOld Lugs DO
y
n
¾t takes a tight, r²ght hooKp betwEÀÁ
your Âwer cÃble and Äe PPÅ763 Âwer
supply to keep arc²ng and coÆrosion
Çom knocking oÈt your coÉo gear.
This big one-two PM punch wÊËl keep
your ±·/ÌRC-142 Ír ¹122 radio
teletypewriteÎ set runnÏng trouble Çee.
W±TCH POL±RÐTY. SlÏp the posi³
tiÑe caBle lug over the power supply's
positive load termÊnal. Then match
negatÊve to ÒegatÊve.
Reverse
ÓÔ
the two and you'll blow
somethÊngÕan ±·/ÌRC-106 radÊo,
¶r instance.
LÊkew²se, be sure you're mak²ng
the ÊnteÖal power setting ¶r 115
or 230 volts per Para 2-4 of TM
11¹5820-765-12.
O·C× YOØ'V× ÌOT the cables on
the rÊght termÏnals, be sure the lugs are
snug. Coat the termÏnalÕlightlyÕwÊth
silÊcone ·S· 6850-Ù-880-7616. Then
put the lugs under the terminal nuts. ºf
the nuts are mÏssing, replace them. Øse
·S· 531000¹939¹2653 .
¾f you leave the lugs loose, you'll get
arcing anÚ corros²
d
n. That'll Blow the
PP-4763's M2 output current meter.
Tight also means replac²ng the ouÛ³
puÜ terminal access plate and securing
the cable clamps. That helps keep the
lugs Ýom working loose.
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