PS Magazine - JULY 1974
PS, The Preventative Maintenance Monthly
ISSUE 260
JULY 1974
F
ACT:
Common sense and a sprinkle of
PM cAn do wonders in extendiNg mag-
netRon Tube liFe in The ±² moDulator³
oscillator of your Improved Hawk ´µ
I
MPQ¶48 (I·W´±) raDar set.
FACT±
¸itto for o¹her parts and coº»
ponents of the ICW ´±¼
ANOTHER FACT²
If you ½eeD the poinTs
men¾ioneD he¿e, iÀ addition to obserV»
ing Áhe waÂiÀgsà cautions and notes in
ÄM 9°1430Å528Æ12Æ1 Ç´ug 72), you can
more than double the
l
of the magnetÈ
ron TuBE¼ Ähe ÄM's Change 4 is especially
important.
Here's an inÉormation smorgasborÊ oË
the ÌÍW´± thaÎll keep you in business:
CIRCUITS
Ähe moDulatorÆoscillator shoulD always
be Ïred in accorDance Ðth ÄM proÑ
Òlways folloÓ The ÄM st«ps ÔOr Õe
test, check or adjustmen¹ YouÖre making.
´nD . × ¼ once ¹he magnetron has bØeÙ
started, neVer tuÚÛ Üt oÝ uÞless it has beeÀ
operating for ßt leàst 15 minutes (the onlá
exceâtion woulD ãe an emergencä)¼
REMOVE FUSE
WhEN SET IS
IN STANDBY FOR
EXTEnDEd PErIODs
´nother magneåonæsa
_
Verç ±emoVe Õe
è
MagÀetron ²ilamenT fUse and turn thé
magnetroÀ swÜtch êon the CÅI panelë tì
the í²² position ÓîeneVer ïou leaVe ¹ðñ
set in stanDbò or false raDiate fór moôe
thaõ 5 minutesö
WheÀ reaD÷ to start the maggie, insert
tøe ºaggie ÏLament fuse and Tu ùhe
maggie sÓitch to úµ for about 5 minuteS.
ûüat iýsures pþoÿer warmĀup.
.
āou caĂă add liĄe to tąe maggie, tooà Ćn
this waïç ¸o
not
DeÅenergize the raDar to
·
make routiÀe checks!
STaRT-rUN CURRENT CHECKS
WheÀ aDjustćng the ºagnetron ÏlamenĈ
currentĉ the Ċook tells
to hċlD ¹he
ČčϱÄÅ±ďµ swiĐcđ iÀ the ĒÄē±Ĕ posi»
tiĕn for
no Longer
tĖan ė0 seconĘs¼ µatę
urallyĉ that Ěreěents Ĝamageĝ
Ähe life of the maggie is greatlĞ ğĠecteD
bï
ġ
¹he number oĢ tģmes ܹ is Ïred or
starteD. ďsuallï, a small pĤrtion of the
cathoDe element is removed on each Ïringĥ
Čo, to ĦextenD its life, hold the maggie
starts to a minimuº¼
SEAT IT RiGHT
In seating Õe ±² modula¹orħoscillator,
eyeball Chap 5 (and Change Ĩĩ of ĪM
9Å1430ī528¶12Ā1 for the proper procedure.
It's important to sea¹ it ÔĬlĭyĮ
PC CARDS
µeįer mark the coİeD moDules (printeı
circuit carDs) in the signal processor of
the IJijWĴĵ (ÀeVer mark 'em whereVeĶ
;
ķou ÏnD 'em)¼
ĸhe carDs are Ào longer throwĹawaĺ
items¼ Ļou tu ļeĽ in To supportľ
Marking tąeº (with anything) can
Damage the leaDs¼ Ĵt The least, the carDs
Ŀ
must be cleaÀeD ¼¼¼ and that adDs To reŀŁ
15
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