Radio Service Short Cuts - 1940, ZACHOMIKOWANE#, Doc, 00 - Księgozbiór Elektronika
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I
ARETHEANSWER,S:
t
The
WBsrox
Model 787 is the only service Oscillator which
reads
t'
40
kc. per
division
at 40 mc. This precise tuning is absolutely essen-
tial to test the band width
of
F.M.
receivers. Each instrument is individu-
ally hand calibrated at 2 mc. intervals.
(The broad frequency coverage
of Model 787...from 22 to 150 mc. fundamental
frequencies...safe-
guards againstobsolescence
HER.E
in the event of changesin assignedchannels.)
WESTONModcl 787
U.H.F.
Oscillotor
t
The WBsroN Model 776 Oscillator supplies an absolutely stable
3'
signal
source.Laboratory tests have shown that the frequency drift
is
less
than .05Vo
at 5 mc. for an operation period of several hours. This
stability is the
result of newly improved control circuits. With Model 776,
too, an individually hand calibrated
scale insures
dependable accuracy
over its entire frequency range of from 50 kc. to 33 mc., fundamental
frequencies.
?
Because of
frequency
limitations
of present visual
aligning equip-
v
t
ment, current measurements down to 1 microampere offer the only
means of checking I.F. alignments, cut-off
point
on limiter tube, and ad-
justment
of discriminators. WrsroN Model 772 Super-SensitiveAnalyzer
offers all ranges necessaryto make these sensitive measurements; plus
additional ranges for all customary voltage,
current and
resistancemeas-
urement
needs.
WESTONModel 776
diroct-rcodingOscillotor
FulI
particulars
on the above insfrumenls are available in bulletin lorm,
and wiII
fladly
be senf on reguesf. Weston Elcc/.;ical Instrument Cor-
potation,581 Frelinghuysen Avenue, Newark,
Ncw
Jusey.
WESTOIIli-odel
772
Supcr-Sm:ilivcAnolyrer
RADIOond TelevisionRETAILING'S
Senuire S/rr'nf errJr
1940
Edition
of
"Tricks
of
the Trade"
- -
Enlargcd,Reviced,Renamed
Practical
"bread
and butter" tips for radio dealersand
servicemenon how to fiindand repairthe most common
troubles
peculiarto specificmodelsof receivers
plur
ReferenceCharts of PermanentValueand Use
o
THIS
manualmight properlybe na"'edMONEY
'
MAKING SHORT CUTS for the radiodcaler
and rerviceman.lt has a wealthof new material
includingall
recently-compiled
troublesand curcr,
for quickreference.
all arranged
Eveir though
you have
a
previous
edition,
you will
ncedthis new
one. lt coversthe makesandmodels
that
you
are most
likelyto work upon. Youwill find
it invaluableand
indispensable.
Discardthe old onc
and
put
this newone to work
. . . at oncc.
o
publishedby
RADIOond TelevisionRETAILING
330 West42nd Street
New
YorkCity
COPYRIGHT
I94O
,l
ltUhat
ttilill
lt Cost
to
FIX
lt .
Don'taska radio
serviceman
this
question
and
demandan immediateanslver
un-
lessyou are
willingto accepta roughand probably
high
"blankef"
esfimate
RADIOis the MOSTCOMPLICATEDMechanismUsed
in the HOME Today
whv
Snap
Judgment"
Pricing
3a
Should
Be
Avoided
Few radio troublescan be a,ccuratelydiagnosedeven
by expert
tech-
I
I
niciansaffer merelylisfeningto a
set
play
Conditionsin ihe
home,or on the salescounter,are not conduciveto
,
-
fhe
calm,carefulthoughfso essential
in this work
Evenwhereone componentpart
hasobviouslyfailed other parts more
e
U
difficulfto find may have
causedthisfailure
"lniermitfeni"
troubles,
most difficult of all to find,
sometimesrequire
|
T
fhat the
set be
played
for hoursbeforethey develop
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