Technical information

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WESTON
Modcl
787
U.H.F.
Oscillotor
WESTON
Model
776
diroct-rcoding
Oscillotor
WESTOII
li-odel
772
Supcr-Sm:ilivc
Anolyrer
HER.E
ARE THE
ANSWER,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
against
obsolescence
in
the
event of changes
in assigned channels.)
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-Sensitive Analyzer
offers all
ranges necessary
to
make
these sensitive measurements;
plus
additional ranges
for
all customary voltage,
current and
resistance meas-
urement
needs.
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.