PS Magazine - APRIL 1981
PS, The Preventative Maintenance Monthly
ISSUE 341
APRIL 1981
i.
':
I
; I
I
One final check. Once the meters
TEST METER. If you get a readinG
the
set
is
ready. Switch
back
±o
OPERA TE .
.. and make sure you give
the set a minute to warm up before
trans²itting. The short wait gets rid
of heat in the finaL amp and prevents
trans"istor damage.
Make sure the HV RESET switch is
aLways on OPERATE before you turn
the set off. If you lea³e it in TUNE, the
high-voltage
reset
reLay
won't
energize and wiLL Leave you with a dead
set.
Don't make
a
move .
.. at Least u´tiL
you've secured your µ106 in its M¶·
3140 mount. If it's no± Fastened doW´,
you risk breaking t¸e CXµ10099 ¹dog
boneº cabLe, or worse»throwing t¸e
amp off its perch¼
MT-3140
mount
¶¸e opera±ors manuaL s¸ows you
how
to
adjus±
the
mou´t.
Bu±
remember, w¸en You ½¸a´ge a ½om¾o¿
nent, you have to readjust.
¶¸at job's a LittLe tougher w¸en
youÀ set's in a sheL±er, but ´o Less
important. ¶o do i± rig¸t, ge± someo´e
to heLp you taKe t¸e set dow´ a´d do
your worK on the FLoor.
center, check POÁER OU¶ with the
jÂs± to the Left of the scaLe's gray area,
Did YOU LEVe T±
Hv R²S³t sW´µCh oN
¶ln· w¸¹º y»u ¼r½¾¿
ÀFf ÁÂÃ ÄÅÆ
Many s¸elterÃmounted sets are misÄ
matc¸ed.
¶ry to Keep your set togetherÅ IF o´e
compone´t goes bad, turn ÆÇt¸ in.
ALining
either
with
a
substitute
partner can cause overheating»and
damage»when the originaL duo is
paired up again.
Any time you're Faste´ing t¸e dog
bone cabLe, tighten both sides at the
same time. Èoing one at a time puts
t¸e flexible metaL piece in a bind and
can snap it.
No need to wai± ÉÇr a com¾one´t
c¸ange, tho. Êhe½K YouË matc¸ ´ow.
26
±²³³³³³³´µ I¶'S_GO¶¶A g·¸¹º»¼½
Saving your set mÌa´s se´di´g a
signaLÍ TÎat means beFÏre transmitÐ
±ing, be sure you ¸a³e a hooKedÑu¾
ante´´a. ÒF you doÓ't, aLL ±¸a± e´ergY
backs up and za¾s Your ±ra´smi±ter.
Ôou
ca´
±¸inK
You've
got
an
antenna and not ¸ave one. ÕÖri´sta´½e,
if rust has i sulated your ×B·652 mast
base. ØhecK t¸e bowL a´d base at ÙM
attached to t¸Ú am¾. MaKe sure t¸Ú
·
cÇnnectio´ is s´ug, too. Ùoor Ûo´ta½±
can do you in.
IF you use the 50·ohm ×Ü/ÈR×Ý50
doubLet, sÞe t¸at it's cut to ±¸e ¾ro¾er
Freque´cy. IF t¸e doubLe± won't tune
rig¸t»e³en w¸en cut to t¸e right
Le´g±h»try i´creasing t¸e Lengt¸ by a
ßot or ào.
In the Field, áeep anten´as more
than 15 feet apart, too. â³en wit¸ a set
turned ofF, t¸e receiver ½an be damagÄ
ed ãecause the a´tenna stays ½o´ä
nected.
Be sure the R¶ is ofF ±¸e ±ra´smitÄ
ting Frequen½y of nearby sets bY at
Least 1 MHz. ÒF you're transmi±±ing
above
10
å
MHz,
staY
ofF
Yoær
Ôou can go wit¸ eit¸er a doubLe± or
´eig¸bor's airwaves bY a 10 ¾ercent
w¸ip, but be sure one or ±he ot¸er is
¾¿ÀÁÂCLEÃN
Äs c··LÅÆÇÈÉ
çee¾ingèéour set ½Lea´ a´d ½ooL WiLL Kee¾ it on the job, too. êse a ½Lo±¸ to
wi¾e oFF dus± .ë âven t¸a± ±¸i´ LaYer oF
ÊleËn wÌthÍ Ën
Î
ËÏr hoÐe
•
dirt ca´ aìt as an i´suLator íand raise
the temperature oî your radio.
ÊLea´ t¸e ¸eat exchanger wit¸ an
air hose throug¸ ±he vent. çee¾i´g
ïoats off t¸e ven± wiLL ðLso áeep ±¸i´gs
cñoLò
×´ot¸er way to i´sure ½ooL is ±o
±urn ±¸e óô to õ¶×NDB: w¸e´ ´o±
w¸en You're s¸ut±inö dow´ ÷r an
Ñ
·±],
opera±ing ør a´ houù or Less; and
ÇÈÈ
¸our or more.
27
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