INSTRUCT ON BOOK

AND

WIDE-BAND VOLMETER

476J-l

I (

----- COLLIN RADIO COMPAN

T E

INSTRUCT ON BOOK

1 E

AND

WIDE-BAND VOLMETER

476J-l

I----- COLLIN RADIO COMPAN

GUARANTEE

The equipment described herein is sold under the following guarantee:

Collins agrees to repair or replace, without Charge, any equipment, parts, or accessories which are de­fective as to design, workmanship or material, and which are returned to Collins at its factory, transportationprepaid, provided

(a) Notice of the claimed defect is given Collins within one (1) year from date of delivery and goods arereturned in accordance with Collins' instructions

(h) Equipment, accessories, tubes, and batteries not manufactured by Collins or from Collins' designsare subject to only such adjustments as Collins may obtain from the suppher thereof.

(c) No equipment or accessory shall be deemed to be defective if, due to fxposure or exceSSl\ e moisturein the atmosphere or otherwise after delivery, it shall fail to operate in a normal or proper manner.

Collins further guarantees that any radio transmitter described'herein v.ill deliver f 11 radio frequency pO'Joeroutput at the antenna lead when connected to a suitable load, but such guarantee sha I not be canstI' ed as aguarantee of any defInite coverage or range of said apparatus,

The guarantee of these paragraphs IS void if equipment is altered or repaIred J others a Col ns or "authorizea service center.

No other warranties, expressed or implied, shall be applicable to any equipment sold ere ndt:rforegoing shall constitt:te the Buyer's sale right and remedy under the agreement~ n

or indIrect!, arising from the use of the products, or any inability to use themwith other equipment or materials, or from any other cause

HOW TO RETURN MATERIAL OR EQUIPMENT. U, for any reason, }O -' t returnmaterial or equipmen e er del' e

guarantee (Jr otherv.ise, you should notify us, giving full particulars including the deta Is IIs'ed 1 - I' aappli able. U the item is thought to be defective, such notice must give full informatio as 0 re 0 efectand identification (including part number if possible) of part considered defectIve. ( hI's bes ',. es g;:pst that your adjustments can be speeded up if you give notice of defect direc ly to the e manuf- curerUpor. "e eipt of such notice, Collins will promptly advise you respecting the re urn. Fall re a _ec :.Ire a I' adviceprIOr tothe fo:,warding of the goods or failure to provide full particulars mav cause unn e sa delay In handlingof Jour eturned merchandise,

ADDRESS:

Collins Radio Company

Sal0s Service Department

Texas DivisionDallas, Texas

INFOR• .A TION N "'OED:

(A) Type number, name, and erial number of equipment(8) Date of delIvery of equIp cnt(C) Date placed in service(D) Number of hours of service(E) Nature of trouble(F) Cause of liouble if known(G) Part number (9 or 10 digit number) and nameof part

thC'Jl"l1t ~ be causing trouble(H) Item or symbol number of same obtained from parts

list or schematic(I) Collins' number (and name) of unit sub-assemblies

involved in trouble(J) Remarks

When ordering replacement parts, you should dIrectHOW 0 ORDER REPLACEMENT PARTS. your orderas indIcated below and furnish the followinginformation insofar as applicable. To enable us to give you better replacement :5ervice. please be sure to giveus complete information.

ADDRESS:

Collins Radio Company

Sales Service DepartmentTexas Division

Dallas, Texas

INFORMATION ro;'EEDED:

(A) Quantity. required(B) CoUip , part number 9 or 10 digit number) and de­

scription(C) Itpm "' .• mbol umber obtained from parts list or

scl.ematic(D) Collins' t ;Je n m cr, rome, and serial number of

princip11 e ui m T'

(E) Unit "'ub-a~:-e;r.hl pplica.ble)

INSTRUCTION BOOK

SELECTIVEAND

WIDEBAND VOLTMETER47 6J-1

520 5199 002 MARCH 195959-14

©COLLINS RADIO COMPANY1959

CEDAR RAPIDS, IOWA, U.S.A.Texas Division

=============== PRINtED IN THE UNITED STATES OF AMERICA ========= -I.!!!;l==:~-

TABLE OF CONTENTS

SECTION PAGE

I GENERAL DESCRIPTION 1

1.1 General . 11.2 Equipment Description. 11.3 Unit Characteristics 11. 3.1 Physical Characteristics 11. 3. 2 Operating Characteristics 1i. 3. 3 Electrical Characteristics 1

"- II INSTALLATION 2

2.1 General 22.2 Unpacking the Equipment 22.3 Installation 22.4 Initial Adjustments. 52.4.1 Primary Power . 52.4.2 Adjustments 5

III OPERATION 5

3.1 General 5r 3.2 Controls 5'""'~-

3.3 Calibration 5

WØCCW

Table of ContentsList of Illustrations

TABLE OF CONTENTS (CO NT.)

SECTION

III (Cont'd.)

PAGE

VI PARTS LIST

V MAINTENANCE

IV PRINCIPLES OF OPERATION

3.43.4.13.4.23.53.5.13.5.23.5.33.5.43.5.5

4. 14.24.2.14.2.24.2.34.2.4

5.15.25.35.3.15.3.25.3.35.3.45.3.5

5.4

VTVM Measurements (Wideband)RMS LevelsVoltage Ratios .

Selective Voltmeter MeasurementsHarmonic Distortion MeasurementIntermodulation MeasurementsCrosstalk MeasurementAttenuation Measurement~

Modulation Characteristics Test

GeneralCircuit Description

Input and Amplification800 KC I- F Circuit with Filtering15 KC I-F Circuit with FilteringOutput Circuit

GeneralRecommended Test EquipmentBench Test and Alignment .

Wideband Voltmeter (vtvm) CalibrationSelective Voltmeter Calibration50 KC Oscillator Level CalibratiopOutput and Meter Alignment

Normal CalibrationTroubleshooting

66677889

9

10

101010101011

.. . 11

'-.---'

11

11111111121212

12

15

LIST OF ILLUSTRATIONS

FIGURE PAGE

1-11-23-1

3-2

ii

Selective and Wideband Voltmeter 476J-lCarrying Case for Selective and Wideband Voltmeter 476J-lSelective and Wideband Voltmeter 476J-l Harmonic Distortion

MeasurementsSelective and Wideband Voltmeter 476J-l, Intermodulation Measurements

iviv

78

'- ~._~------~~--------------------

FIGURE

3-3

5-1

5-2

TABLE

I

LIST OF ILLUSTRATIONS (CONT.)

Selective and Wideband Voltmeter 476J-l, Near-end andFar-end Crosstalk Measurements

Selective and Wideband Voltmeter 476J-1, CalibrationEquipment Assembly

Selective and Wideband Voltmeter 476J-1, Schematic Diagram

LIST OF TABLES

Average D-C Operating Voltages

Table of ContentsList of Illustrations

PAGE

9

1113

PAGE

12

iii

Section IGeneral Description

RI09

5101

EIOI __--.t1llll[.

CI32

"

Ir5102 5103 JIOI 5106 5104

Figure 1-1. Selective and Wideband Voltmeter 476J-1.

"1101

RI50

.......-"O!!IIiiI---RI80

838 877 Pb

B38 876 Pb

•

Figure 1-2. Carrying Case for Selective and Wideband Voltmeter 476J-1.

iv

\.......-.

Section IGeneral Description

SECTION IGENERAL DESCRIPTION

',--.

1.1 GENERAL

Selective and Wideband Voltmeter 476J-1 is a highlysensitive, selective test instrument which measuresthe voltage level of each frequency component ofcomplex wave forms in the 4 to 750 kc range. As aselective voltmeter it is used either in the laboratoryor in the field for several types of measurements:(1) harmonic distortion, (2) intermodulation products,(3) crosstalk, (4) attenuation, and (5) modulationcharacteristics tests, relative to electrical filters,cables, or open-wire lines. The frequencies of acomplex wave form are also indicated. As a wide­band electronic voltmeter the 476J-1 measures therms voltage level of a single or composite signal ornoise in the 200 cps to 750 kc range.

1.2 EQUIPMENT DESCRIPTION

The 476J-1 consists of four major circuits: (1) anr-f amplifier with an input matching network and alow pass filter, (2) an 800 kc i-f circuit, (3) a 15 kci-f circuit, and (4) a metered output circuit. Seefigure 1-3.

The 476J-1 is a single unit which can be either rack­mounted on standard 19-inch racks or used on abench. It is fitted with removable safety covers andtwo carrying handles. A reinforced wooden carryingcase is available for transporting the unit. Seefigure 1-2.

Standard construction techniques are used on internalwiring with small parts accessible on compositionterminal boards. Critical circuits are enclosed inmetal containers which have removable covers.Tubes are held in place by spring loaded holders.The tuning condensor is ruggedized, vernier-driven,and directly calibrated with the tuning dial. The dialis illuminated with two 6.3 volt pilot lamps.

1.3 U NIT CHARACTERISTICS

1. 3.1 PHYSICAL CHARACTERISTICS

Weight (unit only)59 pounds

Weight (encas ed)78 pounds

SizeWidth

19 inchesHeight

10 1/2 inchesDepth

12 inchesForward Projection (when rack mounted)

2 1/4 inchesMounting

Rack mounted or portableFinish

Chrome plate and tin plate chassisGrey panel

VentilationConvection

1. 3. 2 OPERATING CHARACTERISTICS

Ambient Temperature-100 C(140 F) to 500 C(1220 y)

Ambient Relative Humidityo to 90 percent

Ambient Altitude15,000 feet

Operating Duty CycleIntermittent, attended

1. 3. 3 ELECTRICAL CHARACTERISTICS

Voltage Requirements110 volts a-c, 42-60 cps to280 volts a-c, 42-60 cps,50 volt-amperes (variable)

Input ImpedanceBalanced

75-150-600-2K ohms, minimum returnloss 20 db. .30 db minimum balancedattenuation. Up to 500 volt d-c blocking.Approximately 50 uuf shunt input capaci­tance

Unbalanced75-150-600-20K ohms: minimum returnloss 20 db. Up to 500 volt d-c blocking

1

Section I - IIGeneral Description - Installation

Input Potentiometer5K ohm (non-inductive) for full dynamicrange use

Measurement CharacteristicsWide-Band Voltmeter

Voltage10 to 100 millivolts; 1 to 10 volts

Frequency200 cps to 750 kc

Accuracy5 percent (full scale deflection)

Selective VoltmeterVoltage

10 microvolts to 10 volts (-100 db*to +20 db)

Frequency4 kc to 750 kc (continuous)

Accuracy10 percent (Full scale deflection)

SelectivityLess than 4 db attenuation at f ±100cycles;More than 75 db attenuation at f ±600cycles

Spurious Frequency AttenuationMore than 70 db relative to the high­est frequencies considered

Band-pass200 cps

Image Frequency AttenuationMore than 90 db in operating band;Approximately 30 db from 800 kc to 2. 3 mc

Error for ±10 Percent Primary Voltage Varia­tion

Less than 0.1 db as wideband level meter;Less than 0.5 db as a selective voltmeter

Background NoiseApproximately 1 microvolt

CalibrationSensitivity and Frequency calibrated bymeans of an internal crystal-controlled 50kc oscillator

Protective DevicesReplaceable fuses

250V, .375A B+250V, 2A a-c line

Meter1 milliampere movement, calibrated involts and db

AccessoriesLine power cord; headphones

*0 db equal to O. 775 volts across any impedance load

SECTION IIINSTALLATION

2.1 GENERAL

Section II outlines the procedures for unpacking andinstalling the equipment, applying primary power,and instructions pertaining to initial adjustments andcalibration.

2.2 UNPACKING THE EQUIPMENT

Unpack the equipment carefully. Inspect each com­ponent for physical damage. Check the mechanicaloperations of the switches and tuning controls. Ifany defects are found, refer to the inside front cover

2

of this publication for provisional guarantees andshipping instructions. Place the spare parts kiteither in the carrying case cover cabinet or a suit­able parts storage location.

2.3 INSTALLATION

Remove the protective covers by loosening the knurledscrews. Remove all shipping documents and packingmaterial from the instrument. Secure all tubes inthe sockets. Check the pilot lamps on each side ofthe. dial assembly. Replace the covers. Check fuseson rear of unit and replace blown or missing fuses.

R MOD 2

SELECTIVEVOLTMETER

AMPLI FIE'ti

OSCILLATOR

R MOD I

LOW PASSFILTER

o

5102

o6

S10585101

0--0__o_o~ ~......--o_----,}.~

•

IINPUT IMPEDANCE I

BALANCE UNBALANCE

150100

50 KC

VARIABLE FREQUENCYOSCILLATOR

SI05A

6

X db

0----1 0

0---0.1 -20o 60----0·01 -40

SI02

db

+20 -------."

+40--0

CAL 2---01

x

10

,..----7~

~:=> ~"..---~:~o 0 o---Jf-:---- 20K

75------<l1 9~ 0-5K

SIOI

IFREQ RANGE I ISELECTIVE VOLTMETER RANGE I FUNCTION SELECTORSI03

db my my db MAINTUNING

6

-20 100~ ~30-30

150-300~ ~300-450-10 300~ ~IO -40

VTVM~ ~CALI

60-150 --0 a--400-6000 1000-0 3 -50

SELVM---o 0-- CAL 2

060-600-750 OJ0--

(})4 -60 ---01 CAL 2 --0 I 80--- 1 -60 PHONES -0 I 60-50 KC CRYSTAL

5103 5104 5105

~@:J

Section I-IIGeneral Description-Installation

5102

SELECTIVEVOLTMETER

AMPlIFI"'"

R MOD I

R MOD 25104--

51058 Sl05A

IPHONESI

6

GAININT 0

6

15 KC

VTVMAMPLIFIER

OSCI LLATOR1058

o6

o

'to\'-1 -

INTCAL

50 KC

VARIABLE FREQUENCY

OSCILLATOR

SI05A

6

510351058 SI05A

CAL I

CAL 2

50 KC CRYSTAL

MAINTUNING

~L:£J

6

'-----------------+--06

o

0-..---------........--06

o

(.I

Figure 1-3. Selective and Wide Band Voltmeter 476J-1; Simplified Schematic. U 91 0084

3

2.4 INITIAL ADJUSTMENTS

2.4.1 PRIMARY POWER. Attach the line cord con­nector to recessed male input connector P101 on therear chassis. Check the primary power selector onthe rear of the unit to ensure proper a-c operatingvoltages are applied to the power transformer.

Section II - IIIInstallation - Operation

2.4.2 ADJUSTMENTS. Follow the procedure out­lined in paragraph 3.3, CALIBRATION, of SectionIII, OPERATION, for the initial adjustments andcalibration of the unit. If these procedures indicateequipment malfunction, follow the maintenance pro­cedures outlined in paragraph 5. 4, Section V.

3.1 GENERAL

SECTION IIIOPERATION

g. CAL 1 potentiometer R180, located below themeter, which varies the output of the 50 kc oscillator.

The following paragraphs outline the procedures forcalibrating the 476J-1 and making specific measure­ments. Refer to figure 3-1 and paragraph 3. 2 foridentification of controls.

3.2 CONTROLS

Test adjustments are made from the front of the unit.Silk screened labels identify the controls and thevalues of each switch position. There are five rotary,ganged wafer switches: three potentiometers, andtwo variable capacitors:

a. INPUT IMPEDANCE switch S101, a double­pole, 9-position 3-wafer rotary switch, which variesthe input impedance.

b. INPUT attenuation switch S102, a double-pole

10-position, rotary switch, which switches inL-pad attenuators to attenuate the signal.

c. FREQ RANGE switch S103, a double-pole, 6­position rotary switch, which selects the correct LCcombination for the selected frequency range.

d. SELECTIVE VOLTMETER RANGE switchS104, a single-pole, 8-position, rotary switch, whichswitches in series resistance.

e. Function selector switch S105, a double-pole,6-position, 3-wafer rotary switch which selects themode of operation.

f. ADJ INPUT potentiometer, R109, located onthe upper left corner, which varies the input impe­dance.

h. CAL 2 potentiometer R156, located just to theright of CAL 1, which calibrates the amplifier sec­tions used in the selective voltmeter application.

i. Vernier-driven variable capacitor C131 MAINTUNING knob, located near the dial, which is abroad-tuning control.

j. DIAL CAL trimmer capacitor C132, pointerknob, located to the right of the MAIN TUNING con­trol, which is used for calibrating the dial to exactfrequencies.

3.3 CALIBRA1'ION

Follow the steps below in the proper sequence beforeattempting voltage measurements.

a. Connect the line cord to an a-c receptacle andturn the toggle switch on the front panel to the ONposition. Allow the unit five minutes for stabilization.

Transformer primary voltage selectoron rear of chassis must be in properposition to match a-c source voltage.

b. Turn function selector switch S105 to the CAL1 position.

c. Adjust CAl, 1 Potentiometer R180 for an indi­cation of 0 db as shown by meter M101.

5

Section 111Operation

d. Set INPUT switch S102, SELECTIVE VOLT­METER RANGE switch S104, and function selectorswitch ~105 to 'the CAL 2 position.

e. Turn FREQ RANGE switch S103 to the 4-60position and the tuning dial to the 50 kc position.

f. Adjust the DIAL CAL control C132 until themeter indicates maximum deflection.

g. Reset the dial to the appropriate test frequencyand the switches to the test positions, as specified inthe following paragraphs.

The instrument is now calibrated for normal meas­urements. If a more accurate frequency calibrationis necessary:

a. Connect a headset to jack J101 marked

PHONES.

b. Reset function selector switch S105 to the 50KC XTAL position.

c. Set the dial to the red mark nearest the testfrequency.

d. Adjust DIAL CAL control C132 until a zerobeat is heard in the headset.

e. Reset the dial to the test frequency and setfunction selector switch S105 to the SEL VM position.

3.4 VTVM MEASUREMENTS(WIDEBAND)

The 476J-1 measures single or composite signalrms voltage levels or voltage ratios (in db) over the200 cps to 750 kc spectrum when switch S105 is setin the VTVM position. The measurements can bemade on either balanced or unbalanced two-conductorcircuits.

NOTE

Compare the output impedance of thecircuit under test with the value indicatedby INPUT IMPEDANCE switch S101. Thetwo values should be the same. For verylow level measurements, the input leadsshould be kept as short as possible.Check all ground connections carefully.

6

3.4.1 RMS LEVELS. Follow the steps below whenmaking vtvm measurements.

a. Calibrate the meter as instructed in paragraph3.3.

b. Set INPUT IMPEDANCE switch S101 to thecorrect position to match the circuit under test.

c. Set INPUT switch S102 to the XI0 scale andfunction selector switch S105 to the VTVM position.

d. Connect the circuit being tested to input term­inals E101 and E102 with the center conductor or un­grounded lead attached to terminal E101.

e. Adjust INPUT switch S102 for an on-scalemeter indication, and record the indicated voltage(rms) .

3.4.2 VOLTAGE RATIOS. When comparing thevoltage ratios of two or more signals in succession:

a. Set INPUT IMPEDANCE switch S101 to the0-5K position and function selector switch S105 tothe VTVM position.

This operation fixes the input resistance of the unitat 5,000 ohms (non-inductive) and provides a meansof calibrating meter MI01 to accurately measurevoltage ratios of different input levels.

b. Apply the signal which has the highest levelof the signals being tested to terminals E101 andE102.

c. Set INPUT switch S102 to the 0 db position andturn ADJ INPUT control R109 for a meter MI01 indi­cation of 0 db (0. 775 v).

d. Remove the reference voltage (step b) andindividually measure the remaining levels on thetest circuit. INPUT switch S102 can be adjusted tomaintain on-scale meter readings as necessary.

To compute the level indicated by the instrument:

a. Record the meter indication in db.

b. Note the position of INPUT switch S102 andSELECTIVE VOLTMETER RANGE switch S104.

Section IIIOperation

c. Add the meter indication and the two switchindications algebraically to arrive at the total levelin db: i. e. value in db == -4(meter) -20(SI02)-10(8104) == -34 db.

c. Connect the output terminals of the networkunder test to input terminals EI0l and EI02 on the476J-l and tune MAIN TUNING control C131 to thefundamental frequency.

e. Increase the signal generator output for a fullscale deflection. Record the level.

The total harmonic distortion is obtained from thefollowing formula:

f. Tune the voltmeter to the second, third,fourth, ... n harmonics, and record the level of each.

xl002

+Vn

xl002

+Vn

VI

2 2V + V

2 3

2 2 2 2V2 + V3 + V4 ... + Vn

2 2 2 2V +V +V +V ...

1 2 3 4

d. Set INPUT switch S102 to the +20 db positionand SELECTIVE VOLTMETER RANGE switch S104to the 0 db position.The 476J-l measures harmonic distortion, intermod­

ulation products, crosstalk, attenuation, and modu­lation characteristics when used in the selectivevoltmeter application. The following paragraphsdescribe these measurements. Calibrate the meteras instructed in paragraph 3.3 and perform themeasurements in paragraph 3.4.1, a to e, beforeattempting selective voltmeter measurements. Thelatter ensures that input levels will not overload theinstrument. The instrument has a very narrow band­pass of approximately 200 kc. When making meas­urements in the SEL VM position, rotate the tuningdial slowly to ensure measurement of all signals.Adjust SELECTIVE VOLTMETER RANGE switchS104 to the -60 db range to measure very low levelsignals. Possible errors in measurement can occurwhen other spurious frequencies in the vicinity of1604 to 2350 kc are present. This situation can occurwhen image signals differ in level by less than 30 db.A low-pass filter can be used at the input terminalsto attenuate the spurious frequencies.

3.5 SELECTIVE VOLTMETERMEASUREMENTS

3.5.1 HARMONIC DISTORTION MEASUREMENT.Harmonic distortion is measured by recording fun­damental frequency levels in respect to harmoniclevels. Use the test equipment set-up shown infigure 3-1 and follow the steps below in sequence.

a. Perform steps a and b, paragraph 3.4.1.

b. Set function selector switch S105 to the SELVM position.

(Derivative formula:

v==ff7)if'==1 VI

Measurement of levels differing by as much as 75 dbcan be made by this test. SELECTIVE VOLTMETERRANGE switch S104 indicates up to -60 db; the meterindicates up to -15 db. If the fundamental frequencylevel is of an inconvenient level for mid-scale meterreadings, a potentiometer can be inserted at the input

AMPLITUDE

4 - TERMINALNETWORK

UNDER TEST

"• >• <

POTENTIOMETER( OPTIONAL)

4 76J-1

o-+-----'----'---'--

f I f 2 f 3

FREOUENCY

U91 010 I

Figure 3-1. Selective and Wideband Voltmeter 476J-1, Harmonic Distortion Measurements.

7

Section IIIOperation

of the 476J-1. High level frequencies outside therange of test frequencies can be filtered by an op­tional filter or selective network inserted betweenthe signal generator and the test circuit. See figure3-2.

3.5. 2 INTERMODULATION MEASUREMENTS. Per­form intermodulation measurements in the same wayas outlined above for harmonic distortion measure­ments.

a. Connect the equipment as shown in figure 3-2.

b. Connect the two signal generators shown inthe illustration so the intermodulation products willdiffer by at least 500 cycles. The voltmeter canthen differentiate between the intermodulation pro­ducts.

c. Adjust SELECTIVE VOLTMETER RANGEswitch S104 to the -60 db position for maximumsensitivity.

d. Scan the frequency band carefully and recordthe level of each observed signal.

e. Compare the ratio of the intermodulation pro­duct levels to the test tone levels. System specifi­cations determine the degree of permissible inter­modulation distortion.

3.5.3 CROSSTALK MEASUREMENT. The 476J-lis used to measure both near-end and far-end cross­talk on open-wire lines or cables. The variouscrosstalk components can be separated as to level

and frequency, thus locating the origin of the unde­sirable frequency components. Measurements arelimited on the upper limits by the 476J-l internalnoise voltage, which is approximately 1 microvolt.

a. Connect the signal generator and selectivevoltmeter as shown by figure 3-3.

b. Adjust the output of the signal generator for alevel of approximately +23 dbm*. It is necessary toprovide a low impedance termination on the generatorin some cases to provide a flat output over the testfrequency range.

c. Vary the signal generator across the test spec­trum, at the same time tuning the 476J-1 to the signalgenerator frequency.

d. Record the level of each measurable frequencycomponent as indicated by meter MI01. Intelligiblenear-end cross-talk attenuation measurements up to130 db can be measured.

The instrument can also be used as a very sensitivenull indicator in a bridge type crosstalk meter. Noadditional balancing filters are necessary.

The 476J-l can be used in an actual carrier circuitfor analYZing crosstalk on specific channels. Meas­urements can be made with the meter for purposes ofpinpointing the disturbing frequencies. Headphonescan be used for audible interpretations of the cross­talk.

*0 dbm reference is 1 milliwatt across a 600 ohmtermination.

SIGNALGENERATOR

II

4 - TERMINAL 476J-1HYBRID NETWORK

TRANSFORMER - UNDER TEST f---- 0OR RESISTI VENETWORKS

II

SIGNAL 1

GENERATOR

RELATIVEAMPliTUDE

U91 012 I

Figure 3-2. Selective ,md Wideband Voltmeter 476J-l, Intermodulation Measurements.

8

e. Insert the headphones in PHONES jack J101.

f. Set function selector switch S105 to the PHONESposition.

g. Vary the dial frequency and listen to the chan­nel being tested.

h. Correlate the audible information with the datacompiled by selective voltmeter or vtvm measure­ments.

3.5.4 ATTENUATION MEASUREMENTS

a. Initially set INPUT switch S102 to the +20 dbposition.

b. Tune MAIN TUNING control C131 to the testfrequency.

c. Vary INPUT switch S102 and SELECTIVEVOLTMETER RANGE switch S104 in that order to

Section IIIOperation

provide on-scale indications. Do not overload theinstrument.

Attenuation measurements up to 75 db can be madeon band-pass filters.

3.5.5 MODULATION CHARACTERISTICS TEST.The 476J-1 is used to measure the frequenciesand levels of spurious modulation products in multi­channel carrier equipment.

a. Modulate the channel under test with a 1000cps signal.

b. Attach the circuit being tested to INPUT term­inals E101 and E102.

c. Set function selector switch S105 to the SELVM position.

d. Measure the spurious product frequenciesand levels in the sequence speCified in paragraph 3. 5.

SIGNALGENERATOR

,\ DISTURBING CIRCUIT

TERMINATION/

/

....--I

r----L----l

: 476J-1 :I I\ 0 \, I, ,I ,I ,L ...l

---------DISTURBED CIRCUIT

476J-1 I

l_~U9' 011 I

Figure 3-3. Selective and Wideband Voltmeter 476J-1, Near-end and Far-end Crosstalk Measurements.

9

)

Section NPrinciples of Operation

SECTION IVPRINCIPLES OF OPERATION

4.1 GENERAL

This section consists of a circuit analysis of thevoltmeter by stages, paralleling the schematic dia­gram, figure 5-1.

The 476J-1 consists of four major circuits:

a. An r-f amplifier with an input matching net­work and a low pass filter.

b. An 800 kc i-f circuit, consisting of an 804 to1550 kc vfo, a ring modulator, an 800 kc band passfilter, a stage of resistance-coupled amplification,and another 800 kc band pass filter.

c. A 15 kc i-f circuit consisting of a 785 kccrystal-controlled oscillator, a ring modulator, a15 kc band pass filter, a variable attenuator, twostages of resistance-coupled amplification, and acathode follower.

d. A metered output circuit, consisting of an­other 15 kc band pass filter, three stages of resis­tance-coupled amplification with feedback, and ametered output. Refer to figure 2-1 for circuitidentification.

e. A 50 kc crystal-controlled calibration oscil­lator.

4.2 CIRCUIT DESCRIPTION

4.2.1 INPUT AND AMPLIFICATION. The 476J-1input is either balanced or unbalanced, dependent onthe position of the INPUT IMPEDANCE switch S101.Center INPUT terminal E102 is at ground potentialin the UNBALANCED position. Terminal E103 isat chassis ground potential and can be used for atest equipment common ground.

The signal is coupled through capacitor CI01 ortransformer T101, INPUT IMPEDANCE switch810lB and S101C to the INPUT attenuator switch8102. Through a series of switched resistances,RllO through R1l5, input levels of up to +40 db can

10

be measured without overloading the voltmeter.ADJ INPUT potentiometer R109 is a non-inductivevariable resistance which further varies the inputlevel. The signal is coupled directly to tube VIOl,a dual-triode untuned resistance-coupled amplifier,and from there to the center tap of function selectorswitch 8105B. The 476J-l functions as a vtvm whenS105 is in position 4, and as a selective voltmeter inpositions 1, 2, 5, and 6. The CAL 1 position is ano-signal position. Filter FL101 is a low pass filterwhich presents a high impedance to signals above750 kc and a low impedance to lower frequencies.The signal is applied from the output of FL101 to theprimary Windings of ring modulator transformerT102.

4.2.2 800 KC I-F CIRCUIT WITH FILTERING. Thering modulator consists of transformers T102 andT103, diodes CRl01 through CR104, and potentio­meters R127 and R128. The vfo consists of tubeV102, MAIN TUNING capacitor C131, and a seriesof switched LC circuits: inductors L102 throughL107 and trimmer capacitors C133, C135, C137,C139, C141, and C143, all switched by FREQ RANGEswitch 8103. Trimmer capacitor C132 permitsaccurate calibration of the dial frequency with respectto the input signal frequency.

The 800-kc intermediate frequency signal is coupledfrom the output of ring modulator transformer T103to the input terminals of 800-kc band pass filterFL102. It is then applied from the output of filterFL102 to the grid of tube V103 and further amplified.The output from V103 is applied to another 800 kcbandpass filter and to the second ring modulator.The 800 kc filters pass only a 200 cps bandwidth.

4.2.3 15 KC I-F CIRCUIT WITH FILTERING. The800 kc signal mixes with a 785 kc signal from thecrystal-controlled oscillator, tube V104. at thesecond ring modulator. The 15 kc differElnce fre­quency is applied to switched series attenuator,SELECTIVE VOLTMETER RANGE switch 8104 andresistors RI36 through RI4I. The signal is thenapplied to resistance-coupled amplifiers V105 andV10'! A, cathode follower V107B, and to the input ofthe 15 kc band pass filter FL105.

Section IV - VPrinciples of Operation - Maintenance

4.2.4 OUTPUT CIRCUIT. The 15 kc signal is ap­plied from the output of FL105 to terminals 2 and 5of function selector switch S105B and to the grid oftube V10 S. The three resistance-coupled amplifiers,

V10S and V109 further amplify the signal which isthen applied to output meter M101 or phones throughdetector diodes CR110 and CR111 and switch S105A.

SECTION VMAINTENANCE

5.1 GENERAL

Section V, MAINTENANCE, outlines the proceduresfor testing and aligning the Selective Voltmeter476J -1. Read the provisional guarantee on the in­side front cover of this manual before attempting torepair any malfunctions.

5.2 RECOMMENDED TEST EQUIPMENT

e. Turn the function selector switch S105 to theVTVM position.

f. Adjust rheostat R190 for a meter M101 indi­cation of 0 db on the 476J-1

WARNING Ia. Oscillator, Hewlett-Packard 200CD.

b. Vacuum tube voltmeter, Hewlett-Packard 400D.

c. Oscilloscope, Dumont 304H.

5.3 BENCH TEST AND ALIGNMENT

Operation of this equipment involves vol­tages that are dangerous to life. Whenperforming maintenance operations,special care must be taken to avoid con­tact where high voltage is present. RE­MOVE PRIMARY POWER before changingtubes.

5.3.2 SELECTIVE VOLTMETER CALIBRATION

d. Adjust CAL 2 potentiometer R156 for a 0 dbindication on the meter.

c. Tune the instrument to the 50 kc dial indica­tion for a maximum meter deflection.

b. Turn FREQ RANGE switch S103 to the 4 - 60kc position.

4 7 6 J-'SELECT: \/E

VOL T\\E TEq

,------l200CO 4000

OSC VTVM '

600SL 0

~,----------,,--lY~-------I~I I I 0

a. Turn function selector switch S105 to the <_, <"

VM~ position.

5.3.1 WIDEBAND VOLTMETER (VTVM)CALIBRATION

Follow the steps below in sequence when calibratingthe 476J-1. Perform bench test and alignment pro­cedures at three month intervals and subsequent toshipment to correct misalignment caused by ship­ment or tube deterioration.

a. Remove the bottom cover plate from the in­strument by loosening the two knurled thumb screws.

c. Adjust the oscillator for an indication of 0 dbon the vtvm.

b. Connect an oscillator and a vtvm to the inputof the 476J-1 as shown in figure 5-1. Place a 600ohm load termination across the line.

d. Turn the INPUT switch S102 to the Xl, 0 dbposition.

II 0I

U91 003 I

Figure 5-1. Selective and Wideband Voltmeter 476J-1,Calibration Equipment Assembly.

11

S?etiCln VMaintenance

The instrument now provides equal gain in the VTVMor SEL VM positions.

5.3.3 50 KC OSCILLATOR LEVEL CALIBRATION.When calibrated in the following manner the 50 kcoscillator can be used for an internal calibration

reference signal.

a. Turn switches INPUT, S102, the function se­lector, S105, and the SELECTIVE VOLTMETERRANGE, S104, to the CAL 2 position.

b. Adjust the dial for maximum meter deflectionat 50 kc.

c. Adjust CAL 1, RlS0, for a 0 db meter indi­

cation.

The 50 kc oscillator i.s now adjusted to the correct

level.

5. 3.4 OUTPUT AND METER ALIGl\MENT

a. Switch the function selector S105 to the CAL1 position.

b. Adjust rheostat RlS4 for a 0 db meter indi­cation.

The last three stages of amplification, V107 and

VI0S, and the meter are now properly calibrated tocorrespond to the 50 kc oscillator calibration.

5.3. 5 ~ORMAL CALIBRATION. After completing

the steps of alignment in the preceedi.ng paragraphs,and prior to using the 476J-1 for test purposes, againperform the steps of calibration outlined in paragraph3.3.

5.4 TROUBLESHOOTING

Under conditions of normal operation the 476J -1 will

not require more than the routine maintenance spe­

cified in paragraph 5.3. The tube complement usedhas long life characteristics Perform the steps ofbench test and alignment outlined in paragraph 5.3before attempting to troubleshoot the instrument. Ifthe instrument does not function properly, followthe general outline below to help locate the malfunc­

tioning part or stage. Refer to figure 5-1 for locationsof electrical components.

a. Remove the protective covers by looseningthe knurled thumb screws.

b. Test the tubes in a reliable tube tester.

c. Check the tube voltages. The indicated vol­tages should agree with those given in Table 1. If,after a test of tubes and tube voltages, the unit doesnot function:

d. Attach an oscillator, tuned to 5 kc, to IN"PUTterminals EI0l and E102. Adjust the input signallevel to +20 db and the INPUT level switch S102 tothe +20 db position.

e. Monitor the oscillator output signal by placingthe leads of an oscilloscope across INPUT terminalsEI01 and E102; then adjusting the vertical input con­trols on the oscilloscope to show a low-amplitudesine-wave form.

f. Place a probe on one of the oscilloscope leadsand trace the signal through the circuit from theI:\Pl'T terminals to the output stage. Vary the oscil­lator output level at each check point to verify proper

operation. When the malfunctioning circuit is 10cate1:

g. Perform d-c voltage and resistance measure­ments to locate the circuit component which is notfunctioning. Table I lists the normal operatingvoltages. Resistance values are shown on figure 5-2.

TABLE I. AVERAGE D-C OPERATING VOLTAGES*

Tube VIOlA, B V102 VI03 V104 VI05 VI06 VW7A V107B VI0SA V10SB V109 VllO

E 1.5 - 2 - 3.5 - 1.0 9.5 1 1 1. 75 -k

E - 120 120 150 100 150 - - - - 120 -g2

E 90 150 100 210 100 Z10 SO 210 160 1.,15 125 150p

*Meter used must have internal resistance of 2000 ohms/volt minimum

12

\\\

51028

" Z'24.JZ

R 2111.01

CI70

C'69

\\

IINPUT I5102

"----..~ 1\JJ.- 0' ~~;100 --. __ -30

CAL. 2~1 10.0.01-40

08

+30

+40

+ZO

C1733.3UlJF

"1'3634

-"114200

"ZOIZOK

RII,634

"ZO.ZOK

R20Z20K

R 210 " ZI4191K 402

"2033711.5

-

R20413.7K

C 17110 UUF

R204402

10

PID'

,:\\\\

I \L __~

\

IIIII 5 lOlA

I

5106

5107

ott.

IIOIIACo--~c>

REO

TI05VEl-8AN

UN8AL

0---""""'\.",.----028011 AC

!z.l~---cI(II)O---~ '4 Oil AC

12511 AC

llOI

Rt: 0- V L.

C'OI0.251018

... ...CI511AT _ TC'598

50 ---r--- 50

"'895K

lilt

C 1740.1

,•

-~~-

\

SIOIA

~CI~-= .0'

~-----.----t~.. 250V DC

8lU

... '50V DC 4------.---J\rv'V-+.J 'DOO -............----,

IL

r----------III REO 0 Db.

VIIO

OA2

5

QJ----t---""R-I0-'.....R=-'-=0-=2..-:R:-'''"0=-3.-::R:-10=-4::-.-=-R"":'O-=5.....R:-'-=0-=6..,...-.....619 152 75 898 1635 787

s I Y\ :p~ '"515' fret- - 50 (.

Le.v~ I - a Db.60 J"1,.., UN AL.

HP 0

(INPUT I

EI03

~4 , VIOl

4 :I VI02

4 5 11103

4 5 VI04

4 5 VI05

4 5 VI06

4 511109

411107

4 11108

&.3V AC

•

•

C 1466000

UUF

CI44 C 145261 5 6000WF UUF

C14]

•

RM -I

CRIOI

IDIAL CAL I

4

III II

III1

10

J5103

AT 1023DB/150.l\.

CI761000/5000UUF

L10r L106 LIDS L104 L10] L102

LPFLIOI

2 4

----,

L __ ...J

ATIOI

5DB/300.l\.

IFREQ RAN 1]5103 /'- .- 300-450

110+-...... • 400 - 100

a-~O-'."-J

/(

.-,

rUNC TiON

SELECTOR

SI05

Cloe001

CI09e

J/'

.---VTVM

.---CAL I

.---SEl V"

----50 KC llTAL

....----CAL 2

----- PHONES

//

51058

RI22121

IL _

\\\\

\

+ CI6050'

RI21lOOK

+ ISO V D C .-.......-1~--..,

~

IIIIIIIIII

--~

"

EI3F/66 ..

liP800M(

5

6

Rl1l6

1001C

L __ ..J

r-10I

ClliSIU.5UUF

CI13.1

AI3451 IK

" 19740.2K

CI5724.8UUr

• '1r VD

RI)2162

IIIIIIIIIII

II~

"FO1I04-1550KC

--,5

R ~03

500 - 3000A

E I F/66119

FLI02liP

800x(.

CI43

•

IDIAL CAL I

10

4

J

Cl761000/5000UUF

4

5103r-------, ,....----....,

L __ .J

rl

FLiQ;"'"LP

11-01

III

ATIOI

508/31)0.1\.

IFREQ RANGEl

5103 /'e ., 300-450

-:..-....... • 400-600

a-~o-"~

,.IIIIIIIIII

AI24133

/(

.-.C'Oll001

CI091I

J/

R 12)121

PHONES

SEL ,,-..

• "T".. FUNC TION

SELECTOR

• CAL I... 5105CAL 2

.......50 KC XTA L

B

-.JC;107.001

/(

,-,

CI08001

CI098

CI01'-----1_---J . 00I

IL

11.22121

C'04.001

C1oEh..50•

• 51058•,

\ J\\ /\ /\

/...---- PHONES

• fl VIIIg V''I1lI J (TION

5 LECTORCAl I... CAL 2

5105

"- 50 KC X, AL

VIOIB

CI02 11121002 100M

.. 150'1 Dc ~-....~....--......

11120121

\ ­\\1

"

SI02B

1'2124.32

'1211

'.0'

CI70

el69

\\

AIIO2011

All'634

'120220K

11203

371.5

08

.,0

'121019111 -

CI733.3UUF

A20413.7K

C 17110UUF

'--- --

R204402

10

PIOI

SI02A

5106

SI07

-- --- --- -- .--- -- --

'1207I'.IK.....-----:'-------:-.•~---.- ......'\N"v--I.........---.......a---

\.' ~~c:'1201

\ 20K

\\\

I \L __~

\REO

0--_0 14 OV AC

12 5V AC

~--o IIOVAC

UNBAL

"05YEL-BIIN

~--_" ,.-=---00 280 II AC

AlO-Y L

8 9\1

~~

:I:

•I::>

--~\..JIII

----LIO!

\O~o

~

I I

O.

~

IIIIIIIIII

--~

785KCOSCILLATOR

EI3"/6619

RJ994.42K

6

6

RI86

lOOK

L __ ~

cln122.5UUF

11185511

1119740.ZK

C 15724.8UUF

.250 VDe

IIIIIIIIIII

II~

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CI43

*

1 DIAL CAL I

J5103

L __ --l

" -'C 176

r ---- ...,lOOO/5000UUF II

HIOI R'3. r FL103 lATIOI LP 51 IK

I BP

IIR 135 -

5DB/3I)O.n. AT 102 BOOKC 10K

3DB/150J\.Z"6KJ>. 2o-k'Kh

CRI063 I 11 -n/Jb I 1-3"- CRI07

I I3

CRlce

I I • CRI09CII3

.1

I RI32 I 5J 6 2

4

I10

,.IIIIIIIIII

/

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, '

/

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,J

2

tNT CAL

L..._...... II ••

--~

L.-~-""3

_---+-.... 4

R 17'150

'-'.-,

ICAL I I

-.I ... ..'

R 'BO300

4

e 156005

L __ ...J

C L..2.o

-56

ATI04BOB/ISO.(\,

--------------_._---,

'l g.100

IIIIIIIII

_,J

--,I

- --------------------,

A 201162 K

R200!III

e 16712!l7UUF

R'B840211

el6B12 Z SuUF

Y'OI!lOke

C 166242uul'

'lI87.... 2 K

RI5261111(

r-----I 50KC OSCILLATOR

II 6

IIIIIIIIIIIL~ _

... Z'OV De

SI05A6

... e .26 ...C 116

10 .7

R 142 RI41 Rl4820 RI.9 1M 825

'00

5

L _

4

.~/~'

//

ISE.lECTIVE VOLTMETER RANGE I5104

/

//

//

IUO MV

'- .- 30 MV - 30 08

o MV • 10 MV - 40 DB

OOMV 0 """-,MV 5008

"""-IMV 60 DB

___...... ----. • 2 ~ 0 V OC

SH

C II

PA

coREV

110011

VOLTMETER

US I 0

476 J - I

SELECTIVE AND WIDEBAND1

C 12 90.5

FEB. 1,1959

C. CRANOR

J HARDIN

Sl05A

IPHOt-JES I

APPLICATION

AUTHENTICATION TITLE

FIGURE 5- 2

NEXT ASIY

OAT!DIUWII

OIlAWIIIY

CHICIlIOIT

CR II 0

R ,70lOOK

C 130

,---------+---+----J"

C 05B50

C 1l 78

CllS001

51058

/

CI6102

, '

RIS3

511 K

INT CAL

RI84}50

2

'---..... 5 ••

CI21A50

-4/

r----+-~.4

/---~

R 171150

'.'.-,

ICAL I I

-.I. )

R 180300

CI56005

L __ -l

AlI04

80B/ISO"-

II

3 IIIIIIIII

_5J

C 154 I.0052

I

f.j 9400

1'--JV\.Ar-J,f---"Ja/'I~

c

13

c

To-

ISSUE

564 0520 006

CRill

4

6

C~1l0

N[XT AS'Y I g' T Y I USID 011 110 I DI,I;II'TIOIl I AUT" I DATI 11IE~1:lo.

APPLICATION REVISIONS

AUTHENTICATION-I'

COLLINS RADIO COIPAIYTITLE

OllAWIl J HARDIN SELECTIVE AND WIDEBAND DALLAS, TEXASIYCHICIl[O PART NOIY VOLTMETERA"II0VID 564 0520 006Iv

'"0~fC" C, CRANOR476 J-I

SHEETfI.lllIllII OF SHEETS

DAT(FEB. 1.1959 CllSTOMER NO.

Dllh'" -FIGURE 5- 2

~-I

I-.

Sl05A

C 12 90.5

L- ---....-----;] '~.~o

--. .250 DC

R 170C 058 zoo~

50

fa} f /6&8')

elZS001

4

6.1 PART LIST

SECTION V IPARTS LIST

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBERATlOl ATTENUATOR PAD: VSA-3, APP97S0, CEI

2 -+ 5 db, 150 ohms

ATl02 Same as ATlOl

ATl03 ATTENUATOR PAD: VSA-3, Gr. 6653CE2, 7 db, 600 ohms

ATl04 ATTENUATOR PAD: VSA-3, APP97S0, CE3,7 7- 10 db 150 ohms

ATl05 ATTENUATOR PAD: VSA-3, Gr. 6653 CEl,2 :- 8 db, 300 ohms

ClOl CAPACITOR, FIXED, PAPER:O. 2 [.If, fixed film, ±10% vdcw 300

Cl02 CAPACITOR, MOLDED, FIXED, CERAMIC:2000 [.l[.lf

Cl03 CAPACITOR, FIXED, FILM:. 1 [.If 350 vdcw

Cl04 CAPACITOR, FIXED, TUBULAR CERAMIC:.001 [.If, 350 vdcw

Cl05 CAPACITOR, FIXED, DUAL ALUMINUMELECTROLYTIC:

50-50 f-Lf, 350 vdcw

Cl06 CAPACITOR, FIXED, ALUMINUMELECTROLYTIC:

8 f-Lf, 350 vdcw

Cl07 Same as Cl04

CIOS Same as Cl04

Cl09 Same as Cl06

CllO CAPACITOR, FIXED, PAPER:. 005 f-Lf, 150 vdcw

Clll CAPACITOR, VARIABLE, CERAMIC:10 f-Lf-Lf, 500 vdcw

C112 Same as Clll

15

Section VI

Parts List

DESCRIPTIONTELLETRA COLLINS

ITEMPART NUMBER PART NUMBER

Cll3 CAPACITOR, FIXED, FILM:0.1 f.lf, 350 vdcw, ±5%

C114 CAPACITOR, FIXED, FILM:.002 f.lf, 150 vdcw

C115 CAPACITOR, FIXED, FILM:.01 f-Lf, ±10%, 1000 vdcw

Cll6 Same as C101

Cll7 CAPACITOR, FIXED, FILM:.001 f-Lf, 1000 vdcw, ±10%

Cll8 Same as Cll4

Cll9 CAPACITOR, FIXED, ALUMINUM,ELECTROLYTIC:

I 10 f.lf, 25 vdcw

C120 CAPACITOR, FIXED, FILM:0.5 f.lf, 350 vdcw

C121 CAPACITOR, FIXED, ALUMINUMELECTROLYTIC:

50-50 fLf, 400 vdcw

C122 CAPACITOR, FIXED, FILM:O. 2 f-Lf, 350 vdcw

C123 CAPACITOR, FIXED, ALUMINUM,ELECTROLYTIC: ,

50 fLf, 12 vdcw

C124 Same as C123

C125 NOT USED

C126 I Same as Cll9

C127 Same as C106

C128 CAPACITOR, FIXED, FILM:

001 f.lf, 1000 vdcw

C129I

CAPACITOR, FIXED, FILM:

0.5 f.lf, 350 \'dcw

C130 Same as C129

... -"-

Section VIParts List

TELLETRA COLLINSITEM DESCRIPTIONPART NUMBER PART NUMBER

IC131 CAPACITOR, VARIABLE, VERNIER-

DRIVEN, MAIN TUNING:4-12 f-Lf-Lf: Telettra Gr. 4555/1

C132 CAPACITOR, TRIMMER, APC: Gr. 3120/14

C133 CAPACITOR, VARIABLE, CERAMIC:6-30 f-Lf-Lf

C134 CAPACITOR, CERAMIC, TEMP., COMP.:354 f-Lf.d

C135 Same as C133

C136 CAPACITOR, CERAMIC, TEMP. COMP.:320 f-Lp.f

C137 Same as C133

C138 CAPACITOR, TEMP., COMPo , CERAMIC: VSA-2, Gr. 6653/T.22275 p.p.f

C139 Same as C133

C140 CAPACITOR, TEMP., COMP., CERAMIC: VSA-2, G4. 6653/T. 22224.5 fJ,p.f

C141 Same as C133

C142 CAPACITOR, TEMP., COMP., CERAMIC: VSA-2, Gr. 6653/T.22354 p.p.f

C143 Same as C133

C144 CAPACITOR, TEMP., COMP., CERAMIC: VSA-2, Gr. 6653/T.22261. 5 p.p.f (2)

C145 CAPACITOR, PRECISION CERAMIC:6000 p.p.f, ±1. 2%, 250 vdcw

C146 Same as C145

C147 CAPACITOR, TEMP., COMP., CERAMIC: VSA-2, Gr, 6653/T. 22248, 5 p.p.f (2)

C148 CAPACITOR, FIXED:0.2 p.f, 350 vdcw, ±10%

C149 CAPACITOR, FIXED, CERAMIC:0.2 p.f, 400 vdcw

17

•

Section VIParts List

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBERC150 NOT USED

C151 NOT USED

C152 NOT USED

C153 NOT USED

C154 CAPACITOR, FIXED, FILM:.0032 fJ.f, 350 vdcw

C155 CAPACITOR, FIXED, CERAMIC, TUBULAR:56 f-1f-1f, 500 vdcw

C156 CAPACITOR, FIXED, FILM:. 005. f-1f, 1000 vdcw

C157 CAPACITOR, FIXED, TEMP., COMP.,

CERAMIC:24.8 f-1fJ.f

IC158 CAPACITOR, FIXED, CERAMIC:

.01 f-1f, 1000 vdcwi

C159 CAPACITOR, ALUMINUM, ELECTROLYTIC:

I50 f-1f, 400 vdcw

C160 CAPACITOR, FlXED, ALUMINUM,ELECTROLYTIC:

50 f-1f, 25 vdcw

C161 CAPACITOR, FIXED, FILM:.02 f-1f, 1000 vdcw

C162 Same as C113

C163 CAPACITOR, FIXED, TEMP., COMP.,CERAMIC:

122.5 f-1f-1f

C164 CAPACITOR, FIXED, TEMP., COMP.,CERAMIC:

817 fJ.f-1f

C165 Same as C113

C166 CAPACITOR, FIXED, TEMP., COMP.,CERAMIC:

242 f-1uf

C167 CAPACITOR, FIXED, TEMP., COMP.,CERAMIC:

12570 fJ.f-1f

18

ITEM DESCRIPTIONTELLETRA

PART NUMBER

Section VIParts List

COLLINS

PART NUMBER

C168 CAPACITOR, FIXED, TEMP., COMP.,CERAMIC:1225 fJ-fJ-f

C169 CAPACITOR, YARIABLE, CERAMIC: YSA-3, 82081/10EPhillips

C170 Same as C169

CR101-

CR104 CRYSTAL DIODES:

CR105 CRYSTAL DIODE:

CR106-

CR109 CRYSTAL DIODES:

CRll0-

CRIll CRYSTAL DIODES:

CR112-

CRU5 SELENIUM RECTIFIERS:

CR116 CRYSTAL DIODE:

CR117-

CRl20 Same as CR112-CRI15

DS101 LAMP, MINIATURE, BAYONET:No.7, 6.3 vac

DS102 Same as DS101

FlO 1 FUSE, 1/4 A, 250 v

F102 FUSE, 2A, 250 v

FL101 FILTER, LOW PASS:750 kc

FL102 FILTER, BAND PASS:800 kc

FL103 FILTER, BAND PASS:800 kc

FL104 FILTER, BAND PASS:15 kc

FL105 FILTER, BAND PASS:15 kc

YSA-3, P. 13155

YSA-3, P.7821

Same as CR101-CR104

Same as CR105

YSA-3, P. 11400/10

Same as CR105

YSA-3 Gr. 9861

YSA-3, Gr. 9857

YSA-3, Gr. 9858

FSA-3, Gr. 9859

YSA-3, Gr. 9860

262 3240 00

264 4020 00

264 4070 00

19

::'l'ction \<1

Part~ Li~t

ITEM

JI01

LIOI

Ll02

LI03

Ll04

DESCRIPTION

PHONE JACKS:

I?\DUCTOR, RADIO FREQUENCY:

I:\DCCTOR, RADIO FREQUEKCY:

mDUCTOR, RADIO FREQUENCY:

I?\DUCTOR, RADIO FREQUENCY:

ULLETRA

PART NUMBER

VSA-3 Gr. 986

VSA-3, Gr. 9961,

B.27613, L1

VSA-3, Gr. 6653,

B. 33961, L1

VSA-3, Gr. 6653

B.33962, L2

VSA-3, Gr. 6653,

B.33963, L3

COLLINS

PART NUMBER

LI0S IXDCCTOR, RADIO FREQUENCY:

LI06 INDUCTOR, RADIO FREQUENCY:

LI07 IXDUCTOR, RADIO FREQUENCY:

LIOS INDUCTOR, RADIO FREQUENCY:

LI09 Il'iDUCTOR, RADIO FREQUENCY:

LllO INDUCTOR, RADIO FREQUENCY:

Llll INDUCTOR, RADIO FREQUENCY:

L1l2 I;";DUCTOR, RADIO FREQUENCY:

PI01 PLCG, MALE, 2-Connector, ac:

Rl01 RESISTOR, FIXED, FILM:

619 ohms, ±0.5%, lw

RI02 RESISTOR, FIXED, FILM:

152 ohms, ±O 5%, 1 w

RI03 RESISTOR, F1XED, FILM:

75 ohms, ±0.5%, lw

RI04 RESISTOR, FIXED, FILM:898 ohms: :+:0.5%, 1w

20

VSA-3, Gr. 6653,

B.33964, L4

VSA-3, Gr. 6653,

B.33965, L5

VSA-3, Gr. 6653,

B.33966, L6

VSA-3, Gr. 6653,

B.33561, L7

VSA-3, Gr.9852

B.37154, L1

VSA-3, Gr.9851

B.33961, LI

VSA-3, Gr.2372

P.33962, L2

VSA-3, APP.9780

1. 402. 02 11

Section VI

Parts List

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBER

R1LlS RESISTOR, FIXED, FILM:163. S ohms, ±0.5%, 1w

R106 RESISTOR, FIXED, FILM:78.7 ohms, ±0.5%, 1w

R10, RESISTOR, FIXED, FILM:124 ohms, ±0.5%, 1w

R10S RESISTOR, FIXED, FILM:2740 ohms, ±2%, l/2w

R109 RESISTOR, VARIABLE, WIRE-WOUND,

XON-IXDCCTIVE:5,000 ohms, ±10%, 2 w

RllO RESISTOR, FIXED, FILM:

20,000 ohms, ±0.5%, 1/2 w

Rll1 RESISTOR, FIXED, FILM:6340 ohms, ±0.5%, 1/2 w

R1l2 RESISTOR, FIXED, FILM:2000 ohms, ±O. 5%, 1/2 w

R1l3 RESISTOR, FIXED, FILM:634 ohms, ±0.5%, 1/2 w

R1l4 RESISTOR, FIXED, FILM:200 ohms, ±O. 5%, 1/2 w

RllS RESISTOR, FIXED, FILM:63.4 ohms, to.5%, 1/2 w

R1l6 RESISTOR, FIXED, WIRE WOUND:400C ohms, +5%, 10 w

R1l7 RESISTOR, FIXED, FILM:4750 ohms, ±2%, 1w

RllS RESISTOR, FIXED, FILM:

1000 ohms, ±2%, 1w

R1l9 RESISTOR, FIXED, FILM:100 ohms, ±2'10, 1/4 w

R120 RESISTOR, FIXED, FILM:121 ohms, =0.510, 1/2 w

R121 RESISTOR, FIXED, FILM:100,000 ohms, ±2%, 1/2 w

21

•

Section VIParts List

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBERR122 Same as R120

R123 Same as R120

R124 RESISTOR, FIXED, FILM:133 ohms, ±2%, 1/2 w

R125 RESISTOR, FIXED, FILM:10 ohms, ±2%, 1/2 w

R126 RESISTOR, VARIABLE, FIXED, FILM:10,000 ohms

R127 Same as R126

R128 RESISTOR, FIXED, FILM:715 ohms, ±O. 5%, 1/2 w

R129 Same as R128

R130 Same as Rl18

R131 RESISTOR, FIXED, FILM:16) 200 ohms, ±2%, 1/2 w

R132 RESISTOR, FIXED, FILM:162 ohms, ±2%, 1/2 w

R133 RESISTOR, FIXED, FILM:15,800 ohms, ±2%, 1 w

R134 RESISTOR, FIXED, FILM:51,100 ohms, ±2%, 1 w

R135 RESISTOR, FIXED, FILM:10,000 ohms, ±2%, 1 w

R136 RESISTOR, FIXED, FILM:13,700 ohms, ±0.5%, 1/2 w

R137 RESISTOR, FIXED, FILM:4320 ohms, ±0.5%, 1/2 w

R138 RESISTOR, FIXED, FILM:1370 ohms, ±O. 5%, 1/2 w

R139 RESISTOR, FIXED, FILM:432 ohms, ±O. 5%, 1/2 w

Rl40 RESISTOR, FIXED, FILM:137 ohms, ±0.5%, 1/2 w

22

Section VIParts List

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBERR141 RESISTOR, F1XED, F1LM:

43.2 ohms, ±0.5%, 1/2 w

R142 RESISTOR, FIXED, FILM:20 ohms, ±0.5%, 1/2 w

R143 RESISTOR, FIXED, FILM:110,000 ohms, ±2%, 1 w

R144 RESISTOR, FIXED, FILM:787,000 ohms, ±2%, 1 w

R145 RESISTOR, FIXED, FILM:100,000 ohms, ±2%, 1 w

R146 RESISTOR, F1XED, F1LM:2740 ohms, ±0.5%, 1/2 w

R147 RESISTOR, FIXED, FILM:1,000,000 ohms, ±2%, 1/4 w

R148 RESISTOR, FIXED, FILM:825 ohms, ±2%, 1/2 w

R149 RESISTOR, FIXED, FILM:100 ohms, ±0.5%, 1/2 w

R150 Same as R149

R151 RESISTOR, FIXED, FILM:23700 ohms, iO.5%, 1/2 w

R152 RESISTOR, FIXED, FILM:68,100 ohms, ±O. 5%, 1/2 w

R153 RESISTOR, FIXED, FILM:249 ohms, ±0.5%, 1/2 w

R154 RESISTOR, F1XED, FILM1000 ohms, ±O. 5%, 1/2 w

R155 Same as R147

R156 RESISTOR, VARIABLE, COMPOSITION:300 ohms, ±20%, 2 w

R157 RESISTOR, FIXED, FILM:10,000 ohms, ±2%, 1/4 w

R158 RESISTOR, FIXED, FILM:6810 ohms, i2%, 1 w

23

Section VIParts List

ITEMTELLETRA COLLINS

DESCRIPTIONPART NUMBER PART NUMBER

R159 RESISTOR, FIXED, FILM:5110 ohms, ±2%, 2 w

R160 RESISTOR, FIXED, FILM:

I8250 ohms, ±2%, 1 w

R161 RESISTOR, FIXED, FILM:10, 000 ohms, ±2%, 1 w

R162 RESISTOR, FIXED, FILM:133 ohms, ±O. 5%, 1/2 w

R163 RESISTOR, FIXED, FILM:511, 000 ohms, ±2%, 1/4 w

R164 RESISTOR, FIXED, FILM:162 ohms, ±2%, 1/2 w

R165 Same as R163

R166 RESISTOR, FIXED, FILM:40.2 ohms, ±2%, 2 w

R167 RESISTOR, FIXED, FILM:70.65 ohms, ±O 5 %, 1/2 w

R168 I Same as R161

R169 RESISTOR, FIXED, FILM:42,200 ohms, ±2%, 1 w

Rl70 RESISTOR, FIXED, FILM:200, 000 ohms, ±2%, 1/4 w

I

R171 RESISTOR, FIXED, FILM:150 ohms, ±0.5%, 1/2 w

R172 RESISTOR, FIXED, FILM:17,800 ohms, ±2%, 1 w

Rl73 RESISTOR, FIXED, FILM:1000 ohms, ±2%, 1/2 w

R174 RESISTOR, FIXED, FILM:100,000 ohms, ±2%, 1/2 w

R175 NOT USED

R176 NOT USED

R177 I NOT USED

24

Section VIParts List

TELLF'RA COLLINSITEM DESCRIPTIONPART NUMBER PART NUMBER

R178 RESISTOR, F1XED, FILM:48,700 ohms, ±2%, 1/2 w

R179 RESISTOR, FIXED, F1LM:10,000 ohms, ±2%, 1/2 w

R180 RESISTOR, VARIABLE, COMPOSITION:300 ohms, ±20%, 2 w

R181 RESISTOR, FIXED, FILM:16,000 ohms, ±0.5%, 1/2 w

R182 Same as R181

R183 RESISTOR, FIXED, FILM:80.6 ohms, ±0.5%, 5 w

R184 RESISTOR, VARIABLE, TAPPED, WW:350 ohms, 10 w

R185 RESISTOR, FIXED, FILM:511 ohms, ±0.5%, 1/2 w

R186 RESISTOR, FIXED, FILM:100,000 ohms, ±2%, 1/2 w

R187 RESISTOR, FIXED, FILM:4420 ohms, ±2%, 1 w

R188 RESISTOR, FIXED FILM:40,200 ohms, ±2%, 1 w

R189 RESISTOR, FIXED, WW CERAMIC:5,000 ohms, 10 w

R190 RESISTOR, TAPPED, VARIABLE, WIREWOUND:

1000 ohms, 10 w

R19l RESISTOR, FIXED, FILM:1000 ohms, iO.5%, 1/2 w

R192 RESISTOR, FIXED, FILM:2490 ohms, ±0.5%, 1/2 w

R193 RESISTOR, FIXED, FILM:100 ohms, i2%, 1/4 w

R194 Same as R193

R195 RESISTOR, FJXED, FILM:1000 ohms, ±2%, 1 w

25

:Section VI

Parts List

TELLETRA COLLINSITEM DESCRIPTION

PART NUMBER PART NUMBERR196 RESISTOR, FIXED, FILM:

6810 ohms, ±2%, 1w

R197 Same as R195

R19S RESISTOR, FIXED, FILM:40,200 ohms, ±0.5%, 1w

R199 RESISTOR, FIXED, FILM:4420 ohms, *2%, 1w

R200 Same as R185

R201 RESISTOR, FIXED, FILM:162,000 ohms, ±O. 5%, 1/2 w

R202 Same as R191

S101 SWITCH, ROTARY, WAFER:Double-pole, 9-position, 3-wafer,single terminal shorting

S102 SWITCH, ROTARY, WAFER:Single-pole, 10 position, single wafer,single terminal shorting

S103 SWITCH, ROTARY, WAFER:Double-pole, 6-position, single wafer,single terminal shorting

S104 SWITCH, ROTARY, WAFER:Single-pole, 8-position, single wafer,single terminal shorting

S105 SWITCH, ROTARY, WAFER:3-pole, 6-position, double wafer,single terminal shorting

SlOG SWITCH:Spst toggle

iS107 SWITCH: I

I Spdt toggle

T101 TRANSFORMER, RADIO FREQUENCY: VSA-3, Gr. 9865T.412.120

Tl02 TRANSFORMER, RADIO FREQUENCY: VSA-3, Gr. 6653,T.399.51

T103 TRANSFORMER, RADIO FREQUENCY: VSA-3, Gr. 6653,

, T.413.155

!i_____~'--_

26

Section VI

Parts List

TELLETRA COLLINSITEM DESCRIPTION PART NUMBER PART NUMBERT104 TRANSFORMER, RADIO FREQUENCY: VSA-3, Gr. 6653

T. 398. 56

T105 TRANSFORMER, RADIO FREQUENCY VSA-3, Gr. 2374T. 400.164

VIOl TUBE, MINIATURE, 9-PIN: 255 033200ECC88/6922

V102 TUBE, MINIATURE, 9-PIN: 255 0355 00E83F/6689

VI03 Same as V102

V104 Same as V102

V105 TUBE, MINIATURE, 9-PIN:E80F/6084 255 035400

V106 Same as V102

V107 TUBE, MINIATURE, 9-PIN: 255 0218 00ECC81/6201

V108 Same as VI07

V109 Same as V102

VllO TUBE, OCTAL, 8-PIN, GLASS: 255 0001 00OD3

27

ADDENDUMSELECTIVE AND WIDEBAND

VOLTMETER 476J-l

Section 6. I, PARTS LIST, has been changed as follows:

Delete: (1) Tube, octal, 8-pin, Glass: OD3. CPN 255 0001 00

(1) Fuse, 1/4A, 250V CPN 264 4020 00

Add: (1) Capacitor, Fixed, Film. 0.5 uuf. (CI71)

(1) Capacitor, Fixed, Electrolytic. 50 uf, 12vdcw. (CI72)

(1) Capacitor, Fixed, Film. 0.1 uf, 1000 vdcw.(CI74)

(1) Tube, glow-discharge diode voltage regulator,7-pin miniature. CPN 2570052 00

5 June 1959

(1) Fuse, .375A, 250V CPN 264 4021 00

Change:

(1) Capacitor, Fixed, Film: 3.3 uuf (CI73)

(1) Capacitor, Fixed, Film: 3.3 uuf (C 175)

(1) Capacitor, Fixed, Molded, Ceramic: 1000 ±5000 uuf(value optional) (CI76)

(1) Capacitor, Fixed, Molded, Ceramic: 1000 uuf,150 v (CI77)

(1) Resistor, Fixed, Film: 500-3000 ohms(value optional) 1w (R203)

(1) Resistor, Fixed, Film: 402 ohms ±lSJ, 0.5 w (R204)

Attenuator Pad ATI0l from 150 ohms to 300 ohms

Attenuator Pael ATI02 from "same as ATI0l" toVSA-3 APP9780, CE2, 3 elb, 150 ohms

Attenuator Pad ATI03 from 7 db, 60) ohms to

3 db, 150 ohms

Attenuator Pael ATI04 from 10 db to 8 db

Attenuator Pael ATI05 from 300 ohms to 150 ohms

ADDENDUM II

Selective and Wideband Voltmeter 476J-1 CPN 522 7021 014, isthe same as the bas ic unit, CPN 522 7021 004, except the following

accessories are packed and included in the basie unit shipment.

ADD: (1)

(1)(1)

(1)

Lamp and Fuse Kit-spare

Test Lead KitTube Kit- spare

Head Phones

CPN 564 0515 00

CPN 564 0516 00CPN 564 0519 00

CPN 097 8012 071

HOOK-UP WIRE CODET:'1e characteristics of the hook-up wire used in this equipment are indicated by groups of symbols on the

jia§:rams. Each symbol group consists of a maximum of three letters followed by a maximum of three::-.::ne r at s. ""'hen three letters are used the first indicates the type of wire, the second represents the size:: 'x;re. and the third is the letter "S", used only when the wire is shielded. When two letters are used, the::r st and second letters indicate either the type and size of wire or the size of wire and shielding, respectively.''''he;; one letter is used it indicates the wire size only. The first numeral indicates the color of the wire bodyJ.f.j the second and third numerals, if any, represent the colors of tracers, all numerals being in accordance·.;:it:~ t;~e standard EIA and MIL-W-16878 color code.

The symbols are assigned according to the following table.

I LETT:::R

BC

D

EFGHJKLMN

P

QRT

XYZ

TYPE OF WIRE CODE

TYPE OF WIRE

Cotton Braid Over Plastic(Formerly AN-J-C-48)

Busbar, Round TinnedMIL-W-16878 Type B (#20 and Larger)

I (600 Volts)Miniature Wire, MIL-W-16878 Type B

(#22 Smaller)

Extra Flexible Varnished Cambric

Kel- F (Monochlorotrifluoroethylene)

Neon Sign Cable (15,000 Volts)Silicone

Single Conductor Stranded (Not RubberCovered)

Single Conductor Stranded (RubberCovered)

MIL-W-16878 Type C (1000 Volts)Teflon, MIL-W-16878 Type E

(600 Volts)MIL-W-16878 Type D (3000 Volts)

I

T2flon, MIL-W-16878 Type EE(l000 Volts)

A.cetate Yarn, Telephone Type

SIZE OF WIRE CODE

LETTER SIZE

A #22 AWGB #20C #18D #16E #14F #12G #10H #8J #6K #4L #2M #1N #0P #00Q #000R #0000T #28V #26W #24X #19Y #30Z

COLOR CODE

NUMBERCOLOR

OR LETTER

0 Black1 Brown2 Red3 Orange4 Yellow5 Green6 Blue7 Violet8 Gray (Slate)9 Whitea Clearb Tan

Ic Pinkd Maroone Light Greenf Light Blue

EXA:'IPLE5

:'IIL !YPE C, "22AWG, UNSHIELDED WIRE, WHITE WITH RED AND GREEN TRACERS:? A 9 25 4-1/4

Type Ji \\'ire Size of Wire Color of Body Color of Tracers -- Length of Wire in Inches(Includes Stripping & Tinning)

~.m, TYPE C, =<16AWG, SHIELDED WIRE (SINGLE), WHITE WITH RED AND GREEN TRACERS:R D S 9 25 4-1/4

T':pe Jf ',\'ire Size of Wire Shielded Color of Body Color of Triicers -- Length of Wire in Inches(Includes Stripping & Tinning)

WHITE WITH RED TRACER:4-1/4

::'111.. TYPE B, #22AWG, SHIELDED WIRE (MULTIPLE), WHITE, ANDA S (9) (92)

T':,k of \"'ire Size of Wire Shielded First Conductor Second Conductor -- Length of Wire in Inches(Includes Stripping & Tinning)

-- COll RAD 0 COMPANY ----.