Singer Empire NF-105 User manual

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INSTR
UCTION
MANUAL
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NOISE AND FIELD
INTENSITY METER
: MoDEL NF-ios
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THE SINGER COMPANY ' METRICS DIVISION
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\MARRANTY
THE
SINGERCOMPANY,METRICSDlVlSlON,warrants
eachnew instrument to be freefrom
defects
inmaterial
and
workmanship,
effectiveafterdeliverytothe
original
purchaser
asfollows:
Commander-Instruments:Potentiometers,
Bridges,
VoltRatioBoxesandStandardResistors ....5 years
Sensitlve
Research*
ElectricalIndicating
Instruments .,.,.2 years
OtherElectricaland ElectronicMeasurinoInstruments .
.
.1 vear
Repair
or replacement
(at
ouroption)
without
charge
(F.O.B.
factory)
will
be
effectedwhenour
examinationsatisfactorilyindicatesthatdefects
aredue to workmanshipor materials.Electron
tubes,semiconductors,batteries,
fuzes,
lamps,thermoelements,
andRatioTran*
potentiometers
areexcludedfromwarrantycoverage.Warrantyreturnsmustfirst
be authorizedby thefactory,
lf theinstrument or any
portion
thereof,
has
beenabused,misused,
damaged
by accident
or
negligence,
orif anyserial
number
orseal
has
beenremovedoraltered,thewarranty
is
void.
Thiswarrantyisin lieu
ofallother
obligations
or liabilities expressedor implied andTheSinger
Company
neitherassumes,
nor authorizesany
person
to assumefor them,anyotherliability
inconnectionwithsalesofinstrumentsmanufactured byTheSingerCompany,
Metrics
Division.
THESINGER
COMPANY.
METRICSDIVISION
915PEMBROKESTREET,
ERlDcEP0RT,C0NNECTICUT
r 3211
S.
LA
CIENEGA
BIVD.,LOS
ANGELES,
CALIFORNIA
REPAIR AND MAINTENANCE
Instrumentsshould
be returnedonlyon prior
written
authorization
fromtheSinger
Representa-
tiveor thefactory{t).Warranty
repairwillbe
made
uponwritten
request.Please
provide
thefol-
lowing
informationinorder
to expediteour processing ofyour
instrument:
1. ModelorType 5. Approximate
date
instrumentwas
placed
in
operation
2. Serial
Number 6. Approximatenumberof
hoursof
use
3. Descriptionoftrouble{2) 7. Has
maintenanceactionbeen
previously
requested?
4. Testinstrumentsused 8. Othercomments
Upon
receiptofthis
informationourService
Departmentwill
send
you
service
dataor shipping
instructions.Upon
receiptof shipping
instructionsforwardtheinstrumenttothe
factory
prepaid.
lf requested,
an
estimate
of charges
willbe made beforeworkbegins.
(1)
Contaci
MctricsDivision,BridSeport,
Connecticut
tgr Commandet', Empire', Panoramic',and Sensilive
Research' instruments.
Conlact
Metrics0ivision,los Angeles, Calilornra
for Gerlsch'instruments.
(2)
Include
data
on symptoms,
measurementstaken,suspected
location
oI trouble,maintenanceaction
taken,andanyother
relevant
data.

A DDENDUM
for
MODEL NF-105 and NF-105 ( M-126 )
TYPE T1, TZ, and T3 TUNING UNITS
I. PURPOSE.
il.
To update schernatic diagrarns of T1, TZ, and T3 tuning units
to include the PRE IF OUTPUT circuitrv.
ADDENDUM.
A. Add the following circuitry to the T1 tuning unit schernatic:
R?45
75
P79ANDT7
Add the following circuitry B. to the
OF
J206
TZ tuning unit schernatic:
TO JUNCTION
J2O3
AND
C9
R27
2
75
R274
t20
Jt3
TO JUNCTION

C. Add the following circuitry to the T3 tuning unit schernatic:
TOJUNCTION
OF
S6O2
(WIPER)
B
L6I9 (CENTER
TAP)
III. DESCRIPTION"
The PRE IF OUTPUT circuitry provides an i-f signal whose
bandwidth is greater than the i-f signal obtained frorn the
tuning unit i-f arnplifier. The output of the PRE IF OUTPUT
circuitry is used for spectrurn signature analysis.
Addendurn No. E 10

MODELS TA/NF-IO5
TA/NF-205, TA/
NF-Io5X-M-126
TA/NF.IO5-F ANd
TA/NF-105.FX
L PURPOSE.
To irnprove scan specifications frorn t0 db to 4 db.
It DESCRIPTION.
On Parts Lists and Schernatic Diagrarns, change capacitor C717
frorn 200 uuf to 100 uuf
Addendum No. EIZ