INIT o

5 E T V AND

WIDEBAND VOLTM T R 47 6J·l

520 5199 00 2 MARC 1959 59-14

©CO LI 5 RADIO COMPANY EDAR RAPID, IOWA, U.S.A. 1959 Texas Division

=============== PRINTED IN THE UNITED STATES Of AMERICA =========

TABLE OF CONTENTS

SECTION PAGE

GENERAL DESCRIPTION 1

1.1 General 1 1.2 Equipment Description. 1 1.3 Unit Characteristics 1 1. 3. 1 Physical Characteristics 1 1. 3. 2 Operating Characteristics 1 1. 3. 3 Electrical Characteristics 1

II INSTAllATION 2

2.1 General 2

\ 2.2 Unpacking the Equipment 2 2.3 Installation 2 2.4 Initial Adjustments. 5

52.4.1 Primary Power . 2.4.2 . Adjustments 5

III 5OPERATION

3.1 General 5 3.2 Controls 5 3.3 Calibration 5

. i

_-=:.=~""_

VI

Table of Contents List of Illustrations

SECTION

III (Cont'd.)

3.4 VTVlVI Measurements (Wideband) 6

3.4.1 RM8 Levels 6

3.4.2 Voltage Ratios . 6

3.5 Selective Voltmeter Measurements 7

3.5 1 Harmonic Distortion Measurement 7

3.5.2 Intermodulation Measurements 8 3.5.3 Crosstalk Measurement 8

3.5.4 Attenuation lVIeasurements 9

3.5.5 Modulation Characteristics Test 9

TABLE 0 CO TE TS (CO NT.)

PAGE

IV PRINCIPLES OF OPERATION 10

4.1 General 10

4.2 Circuit Description 10

4.2.1 Input and Amplification 10 4.2.~ 800 KC I-F Circuit with Filtering 10 4.2.3 15 KC I-F Circuit with Filtering 10 4.2.4 Output Circuit 11

V MAINTENANCE 11

5.1 General 11

5.2 Recommended Test EqUipment 11

5.3 Bench Test and Alignment 11

5.3.1 Wideband Voltmeter (vtvm) Calibration 11

5.3.2 Selective Voltmeter Calibration 11

5.3.3 50 KC Oscillator Level Calibratiot1 12

5.3.4 Output and Mete,-' Alignment 12 5.3.5 Normal Calibration 12

5.4 Troubleshooting 12

PARTS LIST 15

FIGURE

LIST OF ILLUSTRATIO 5

PAGE

1-1 Selective and Wideband·Voltmeter 476J-l iv

1-2 Carrying Case for Selective and Wideband Voltmeter 476J-l iv

3-1 Selective and Wideband Voltmeter 476J-l Harmonic Distortion Measurements 7

3-2 Selective and Widebancl Voltmeter 476J-1, Intermodulation Measurements 8

ii

Table of Contents List of Illustrations

LIST OF ILLUSTRATIONS (CONT.)

FIGURE PAGE

3-3

5-1

5-2

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

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

Selective and Wideband Voltmeter 476J-l, Schematic Diagram

9

11

13

LIST OF TABLES

TABLE PAGE

Average D-C Operating Voltages 12

iii

WØCCW

Section I General Description

CI32 FUNCTION SELECTOR SI05

RI09 M 101

SIOI RI50

RI80

EIOI

838 877 Pb

SI02 5103 .1101 SI06 SI04

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

838 876 Pb

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

iv

Section I

General Description

SECTIO I GEN RAL DESC TION

1.1 GENERAL

Selective and Wideband Voltmeter 476J-1 is a highly sensitive, selective test instrument which measures the voltage level of each frequency component of complex wave forms in the 4 to 750 kc range. As a selective voltmeter it is used either in the laboratory or in the field for several types of measurements: (1) harmonic distortion, (2) intermoduiation products, (3) crosstalk, (4) attenuation, and (5) modulation characteristics tests, relative to electrical filters, cables, or open-wire lines. The frequencies of a complex wave form are also indicated. As a wide­band electronic voltmeter the 476J-1 measures the rms volt.1.ge level of a single or composite signal or noise in the 200 cps to 750 kc range.

1.2 EQUIPMENT DESCRIPTION

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

The 476J-l is a single unit which can be either rack­mounted on standard 19-inch racks or llsed on a bench. It is fitted with removable safety covers and two carrying handles. A reinforced wooden carrying case is available for transporting the unit. See figure 1- 2.

Standal'd construction techniques are used on internal wiring with small parts accessible on composition terminal boards. Critical circuits are enclos ed in metal 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 dial is illuminated with two 6.3 volt'pilot lamps.

1.3 UN T CHA ACTERISTICS

1. 3.1 PHYSICAL CHARACTERISTICS

Weight (unit only) 59 pounds

Weight (encased) 78 pounds

Size Width

19 inches Height

10 1/2 inches Depth

12 inches Forward Projection (when rack mounted)

2 1/4 inches Mounting

Rack mounted or portable Finish

Chrome plate and tin plate chassis Grey panel

Ventilation Convection

1. 3. 2 OPERATING CHARACTERISTICS

Ambient Temperature -100 C(14o F) to 50 0 C(122 0 y)

Ambient Relative Humidity o to 90 percent

Ambient Altitude 15,000 feet

Operating Duty Cycle Intermittent, attended

1. 3. 3 ELECTRICAL CHARACTERISTICS

Voltage Requirements 110 volts a-c, 42-60 cps to 280 volts a-c, 42-60 cps, 50 volt-amperes (variable)

Input Impedance Balanced

75-150-GOO-2K ohms, minimum return loss 20 db. .30 db minimum balanced attenuation. Up to 500 volt d-c blocking. Approximately 50 uuf shunt input capaci­

tance Unbalanced

75-150-600-20K ohms: minimum return loss 20 db. Up to 500 volt d-c blocking

1

Section I - II General Description - Installation

Input Potentiometer 5K ohm (non-inductive) for fun dynamic range use

Measurement Characteristics Wide-Band Voltmeter

Voltage 10 to 100 millivolts; 1 to 10 volts

Frequency 200 cps to 750 kc

Accuracy 5 percent (full scale deflection)

Selective Voltmeter Voltage

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

Frequency 4 kc to 750 kc (continuous)

Accuracy 10 percent (Full scale deflection)

Selectivity Less than 4 db attenuation at f ±100 cycles: More than 75 db attenuation at f ±600 cycles

Spurious Frequency Attenuation More than 70 db relative to the high­est frequencies considered

Band-pass 200 cps

Image Frequency Attenuation More than 90 db in operating b8.nd: Approximately 30 db from 800 kc to 2.3 mc

Error for ±10 Percent Primary Voltage Varia­tion

Less than O. 1 db as wideband level meter: Less than 0.5 db as a selective voltmeter

Background f\oise Approximately 1 microvolt

Calibration Sensitivity and Frequency calibrated by means of an internal crystal-controlled :50 kc oscillator

Protective Devices \

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

Meter 1 milliampere movement, calibrated in volts and db

Accessories Line power corel; headphones

*0 db equal to 0.775 volts across any impedance load

SECTION II INSTALLATI,ON

2.1 GENERAL

Section II outlines the procedures for unpacking and installing the equipment, applying primary power, and ins truction s pertaining to initial adj ustments and calibration.

2.2 UNPACKING THE EQUIPMENT

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

2

of this publication for provisional guarantees and shipping instructions. Place the spare parts kit

J

either in the carrying case cover cabinet or a suit ­able parts storage location.

2.3 INSTALl.ATlON

Remove the protective covers by loosening the knurled screws. Remove all sh ipping documents and packing material from the instrument. Secure 8.11 tubes in the sockets. Check the pilot lamps on each side of the dial assembiy. Replace the covers. Check fuses on rear of unit and replace blown or missing fuses.

R MOD 2

OSCILLATOR i

FIL TER

o

5102

o 6

51058

6

6

SELECTIVE VOLTMETER

AMPLIFIER

R MOD I

LOW PASS

e

5101

"INPUT IMPEDA'NCEe I I'_NPUT I

BALANCE UNBALANCE

x db X db75

10 o+20~ ~I6~:~~ ::: 100 +40---0 0----<>.1 -20 VARIABLE FREQUENCY

150 0 ~ o----j(----:--- 20 K OSCILLATOR

CAL 2---01 6 o-----<J.OI -4075----01 Y' 9~0-5K o 5101 SI02

e. 50 KC5105A -j ~

IFREQ RANGE I ISELECTIVE VOLTMETER RANGE I FUNCTION SELECTOR 5103•

mv MAIN TUNING

db mv db

-20 100 -- -30 VTVM~ ~CALI

150-300~ ~300-450 -10 -40300~

~30 ~IO I~IA~I60-150 ---u 0--400-600 SEL VM--o cr-- CAL 2 CAL0 1000--0 -50

O~J4 -60 --01 (() 6 0--600-750 CAL 2--01 80-- I -60 PHONES -<> I CRYSTAL." o 6 ~50 KC

5103 5104 5105

'.

Section I-II General Description -Installation

5102

SELECTIVE VOL TMETER

AMPLI FIER

R MOD I

R MOD 2 51058 5105A

o 6

o

1058 OSCILLATOR

""'k ~ J¢n _.

VTVM

AMPLIFIER

ICAL 21

15 KC

6

INT 0 GAIN

IPHONESI

-

INT CAL~

~

50 KC

VARIABLE FREQUENCY

OSCILLATOR

6

5105A

IR 5103

51058 5105A

CAL I

CAL 2

50 KC CRYSTAL

MAIN TUNING

I~IAL ICAL

6

• • 06

o

o • • 06

o

(. I

I 5104

U 910084Figure 1-3. Selective and Wide Band Voltmeter 476J-l; Simplified Schematic.

3

Section II - III Installation - Operation

2.4 INITIAL ADJUSTMENTS 2.4.2 ADJUSTMENTS. Follow the procedure out­lined in paragraph 3.3, CALIBRATION, of Section

2.4. I PRIMARY POWER. Attach the line cord con­ III, OPERATION, for the initial adjustments and nector to recessed male input connector PIOI on the calibration of the unit. If these procedures indicate rear chassis. Check the primary power selector on equipment malfunction, follow the maintenance pro­the rear of the unit to ensure proper a-c operating cedures outlined in paragraph 5. 4, Section V. voltages are applied to the power transformer.

SECTION III OPERATI

3.1 GENERAL

The following paragraphs outline the procedures for calibrating the 476J-l and making specific measure­ments. Refer to figure 3-1 and paragraph 3. 2 for identification of controls.

3.2 CONTROLS

Test adjustments are made from the front of the unit. 8ilk screened labels identify the controls and the values of each switch position. There are five rotary, ganged wafer switches; three potentiometers, and two variable capacitors:

a. I PUT IMPEDANCE switch S101, a double­pole, 9-position 3-wafer rotary switch, which varies the input impedance.

b. INPUT attenuation switch 8102, a double-pole

10-position, rotary SWitch, which s'witches in L-pad attenuators to attenuate the signal.

c. FREQ RANGE switch 8103, a double-pole, 6­position rotary switch, which selects the correct LC combination for the selected frequency range.

d. SELECTIVE VOLTMETER RANGE switch S104, a single-pole, 8-position, rotary switch, which switches in series resistance.

e. Function selector switch S105, a double-pole, 6-position, 3-wafer rotary s\vitch which selects the mode of operation.

f. ADJ INPUT potentiometer, RI09, located on the upper left corner, which varies the input impe­dance.

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

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

i. Vernier-driven variable capacitor C131lVIAIN TUNING knob, located near the dial, which is a broad-tuning control.

j. DIAL CAL trimmer capacitor C132, pointer knob, located to the right of the MAIN TUNING con­trol, which is used for calibrating the dial to exact frequencies.

3.3 CALIBRATION

Follow the steps below in the proper sequence before attempting voltage measurements.

a. Connect the line cord to an a-c receptacle and turn the toggle switch on the front panel to the ON position. Allow the unit five minutes for stabilization.

Transformeil.' primary voltage selector on rear of chassis must be in proper position to match a-c source voltage.

b. Turn function selector switch 8105 to the CAL 1 position.

c. Adjust CAL 1 Potentiometer R180 for an indi­cation of 0 db as shown by meter MI0l.

5

Section III Operation

d. Set I PUT switch 8102, SELECTIVE VOLT­METER GE switch S104, and function selector switch ~105 to 'the CAL 2 position.

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

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

g. Reset the dial to the ppropriate test frequency and the switches to the test positions, as specified in the following pa agraphs.

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

a. Connect a headset to jack JI01 marked

PHO ES.

b. Reset function selector switch 8105 to the 50 KC XTAL position.

c. Set the dial to the red mark nearest the test frequency.

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

e. Reset the dial to the test frequency and set function selector switch S105 t the SEL VM position.

3.4 VTVM MEASUREMENTS (WIDEBAND)

The 476J-1 measures single or composite signal rms voltage levels or voltage ratios (in db) over the 200 cps to 750 kc spectrum when switch S105 is set in the VTVM position. The measurements can be made on either balanced or unbalanced two-conductor circuits.

NOTE

Compare the output impedance of the circuit under test with the value indicated by PUT IMPED CE switch S101. The two value should be the same. For very low level measurements, the il1put leads should be kept as short as possible. Check all ground connections carefully.

6

3.4. 1 RMS LEVELS. Follow the steps below when making vtvm measurements.

a. Calibrate the meter as instructed in paragraph' 3.3.

b. Set INPUT IMPEDANCE SWitch S101 to the correct position to match the circuit under test.

c. Set INPUT switch S102 to the XIO scale and function selector switch S105 to the VTVM position.

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

e. Adju t PU switch S102 for an on-scale met l' indication, and record the indicated voltage (rm ).

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

a. Set INPUT IMPEDANCE switch S101 to the 0-5K position and function selector switch 8105 to the VTVM position.

This operation fixes the input resistance of the unit at 5,000 ohms (non-inductive) and provides a means of calibrating meter M101 to accurately measure voltage ratios of different input levels.

b. Apply the signal which has the highest level of the signal being tested to terminals EI01 and E102.

c. Set INP SWitch S102 to the 0 db position and turn ADJ I 'PUT control R109 for a meter M101 indi­cation of 0 db (0.775 v)

d. Remove the reference voltage (step ) and individually measure the remaining levels on the test circuit. INP r switch 8102 ea) e adjusted to maintain on-scale meter eadings as necessary.

To compute the level indicated by the instrument:

a. Record the meter indication in db.

b. Note the osition of INPUT switch 8102 and SELECTIVE VOLTMETER RANGE SWItch 8104.

c. Add the meter indication and the two switch indications algebraically to arrive at the total level in db: i. e. value in db = -4(meter) -20(SI02) -10(SI04) = -34 db.

3.5 SELECTlVE VOLTMETER MEASUREMENTS

The 476J-l measures harmonic distortion, intermod­ulation products, crosstalk, attenuation, and modu­lation characteristics when used in the selective voltmeter application. The following paragraphs describe these measurements. Calibrate the meter as ins tnlcted in paragraph 3. 3 and perform the measurements in paragraph 3.4. 1, a to e, before attempting selective voltmeter measurements. The latter ensures that input levels will not overload the instrument. The instrument has a very narrow band­pass of approximately 200 kc. When making meas­urements in the SEL VM position, rotate the tuning dial slowly to ensure measurement of all signals. Adjust SELECTIVE VOLTMETER RANGE switch S104 to the -60 db range to measure very low level sigllals. Possible errors in measurement can occur when other spurious frequencies in the vicinity of 1604 to 2350 kc are present. This situation can occur when image signals differ in level by less than 30 db. A low-pass filter can be used at the input terminals to attenuate the spurious frequencies.

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

a. Perform steps a and b, paragrapb 3.4.1.

b. Set function selector switch S105 to the SEL VM position.

SIGNALGENERATOR I

II

~

Section III Operation

c. Connect the output terminals of the network under test to input terminals EI0l and EI02 on the 476J-l and tune MAIN TUl\TING control C131 to the fundamental frequency.

d. Set INPUT switch S102 to the +20 db position and SELECTIVE VOLTMETER RANGE switch S104 to the 0 db position.

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

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

The total harmonic distortion is obtained from the following formula:

2 2 2 2V + V + V +VD%=

2 3 4 nt xl00

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

1 2 3 4 n

2 2 2 V + V +V xiOO

2 3 n VI

(Derivative formula: 1 2)V = ~ V 1=1 1n

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

4 - TERMINAL <:4

476J-1 NETWORK

UNDER TEST " 0" >

' <

POTENTIOMETER ( OPTIONAL)

AMPLITUDE

-+-__L-_--L..__L_f I f 2 f 3

FREOUENCY

U91 010 I

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

7

Section III Operation

of the 476J-1. High level frequencies outside the range of test frequencies can be filtered by an op­tional filter or selective network inserted between the signal generator and the test circuit. See figure 3-2.

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

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

b. Connect the two signal generators shown in the illustration so the intermodLtlation products will differ by at least 500 cycles. The voltmeter can then differentiate between the intermodulation pro­ducts.

c. Adjust SELECTIVE VOLTMETER RANGE switch S104 to the -60 db position for maximum sensi tivity.

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

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

3.5.3 CROSSTALK MEASUREMENT. The 476J-1 is used to measure both near-end and far-end cross­talk on open-wire lines or cables. The various crosstalk components can be separated as to level

SIGNAL GENERATOR

and frequency, thus locating the origin of the unde­sirable frequency components. Measurements are limited on the upper limits by the 476J-1 internal noise voltage, which is approximately 1 microvolt.

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

b. Adjust the output of the signal generator for a level of approximately -t-23 dbm*. It is necessary to provide a low impedance termination on the generator in some cases to provide a flat output over the test frequency range.

c. Vary the signal g'enerator across the test spec­hum, at the same time tuning the 476J-1 to the signal generator frequency.

d. Record the level of each measurable frequency component as indicated by meter M101. Intelligible near-end cross-talk attenuation measurements up to 130 db can be measured.

The instrument can also be used as a very sensitive null indicator in a bridge type crosstalk meter. No additional balancing filters are necessary.

The 476J-1 can be used in an actual carrier circuit for analyzing crosstalk on specific channels. Meas­urements can be made with the meter for purposes of pinpointing the disturbing frequencies. Headphones can be used for audible interpretations of the cross­talk.

*0 dbm reference is 1 milliwatt across a 600 ohm termination.

II

, 4 - TERMINAL 476J-1

IIHYBRID NETWORK

TRANSFORMER I--- ­ UNDER TEST - 0

I OR RESISTI VE

NETWORKS

I -' ­

SIGNAL GENERATOR

RELATIVE AMPLITUDE

MEASURED FREQUENCY

f l f2

",', ]"",1

L I:..=2-l U91 012

Figure 3-2. Selective and Wideband Voltmeter 476J-1, IntermodLllation .lVIeasurenlents.

I

8

e. Insert the headphones in PHONES jack J10L

f. Set function selector switch S105 to the PHONES position.

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

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

3.5. 4 ATTENUATION MEASUREMENTS

a. Initially set INPUT switch S102 to the +20 db position.

b. Tune MAIN TUNING control C131 to the test frequency.

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

SIGNAL , DISTURBING CIRCUITGENERATOR \

Section III Operation

provide on-scale indications. Do not overload the instrument.

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

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

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

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

c. Set function selector switch S105 to the SEL VM position.

d. Measure the spurious product frequencies and levels in the sequence specified in paragraph 3. 5.

TERMINATION TERMINATION I

/

~ DISTURBED CIRCUIT I

r L ----1

4 76J-1: 476J-1 : I 0 I

III ,

I I o I I , I L ..J

U91 011 I

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

9

Section IV Principles of Operation

SECTIO IV P INCIPLES OF OPE ATION

4.1 GENERAL

This section consists of a circuit analysis of the voltmetel' by stages, paralleling the schem.atic 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 to 1550 kc vfo, a ring modulator, an 800 kc band pass filter, a stage of resistance-coupled amplification, and another 800 kc band pass filter.

c. A 15 kc i-f circuit consisting of a 785 kc crystal-controlled oscillator, a ring modulator, a 15 kc band pass filter, a variable attenuator, two stages of resistance-coupled amplification, and a cathode follower.

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

e. A 50 kc crystal-controlled calibration oscil ­lator.

4.2 CIRCUIT DESCRIPTION

4.2.1 INPUT AND AMPLIFICATIO J, The 476J-1 input is either balanced or- unbalanced, dependent on the position of the INPUT IMPEDANCE switch S101. Center INPUT terminal EI02 is at ground potential in the UNBALANCED position. Terminal E103 is at chassis ground potential and can be used for a test equipment common ground.

The signal is coupled through capacitor CIOI or

transformer TIOI, li\lP T IMPEDANCE switch S101B and S101C to the INPUT attenuator switch S102. Through a series of switched resistances, R1l0 through R1l5, input levels of up to +40 db can

10

be measured with ut overloa ing the voltmeter. ADJ INPUT potentiometer R1 9 is a non-inductive variable resistan '8 which further varies the input level. The s'gnal is coupled directly to tube VIOl, a dual-triode untuned resistance-coupled amplifier, and from there to the center tap of function selector switch Sl05B. The 476J-l functions as a vtvm when S105 is in position 4, and as a selective voltmeter in positions 1, 2, 5, and 6. The CAL 1 position is a no-signal pOSitiOI. Filter FLIO 1 is a low pass filter which presents a high imp dance to signals above 750 kc and a low impedance to lower frequencies. The signal is applied from the output of FL101 to the primary windings of ring modulator transformer T102.

4.2.2 800 KC I-F CIRCUIT WITH FILTERING. The ring modulator consists of transform rs T102 and T103, diode emOl through CR104, and potentio­meters R127 and R126. The via consists of tube V102, MAIN TUNLlG capacitor CI3l, and a series of switched LC circuits: inductors LI02 through

107 and trimmer capacitor CI3S, C135, C137, C139, CHI, and C143, all switched by FREQ NGE switch S103. Trimmer capacitor CI32 permits accurate calibration of the dial [-1' uency with respect to the input sigllal frequency.

The 800-kc intermediate frequency sigllal is coupled from the output of ring modulator transformer T103 to the input terminals of 800-kc band pass filter FL102. It is then applied from the output of filter FL102 to the grid of tube VI03 and further amplified. The output from VI03 IS applied t a other 800 kc bandpass filter and to the Seaalia ring modulator. The 800 kc fillers pass only a 200 cps bandwidth.

4.2.3 15 KC I-F CIRCUIT WITH FILTER.L.~G. The 800 kc sign ] mixes with a 785 kc signal from the crystal-controlled oscillator, tube VI04, at the second ring modulator. The 15 kc ifference fre-­queney is applied to switche series attenuator, SELECTIVE VOLTMETER RANGE switch 8104 and

resistolS R136 through R141. The signal is then applied to resistance-coupled amplifiers VI05 and

VJ 07A, cathode follower VI07B, and to the input of the 15 kc band pass iilter FLI05.

Section IV - V Principles of Operation - Maintenance

4.2.4 OUTPUT CIRCUIT. The 15 kc signal is ap­ VI08 and VI09 further amplify the signal which is plied from the output of FLI05 to terminals 2 and 5 then applied to output meter MI0l or phones through of function selector switch S105B and to the grid of detector diodes CRUO and CRUI and switch S105A. tube VI08. The three resistance-coupled amplifiers,

SECTION V AI TENANCE

5.1 GENERAL e. Turn the function selector switch S105 to the VTVM position.

Section V, MAINTENAI CE, outlines the procedures for testing and aligning the Selective Voltmeter f. Adjust rheostat R190 for a meter MIOI indi­476J-1. Read the provisional guarantee on the in­ cation of 0 db on the 476J-l side front cover of this manual before attempting to repair any malf~lI1ctions.

WA NING 5.2 RECOMMENDED TEST E UIPMENT

Operation of this equipment involves vol­a. Oscillator, Hewlett-Packard 200CD. tages that are dangerous to life. When

performing maintenance operations,b. Vacuum tube voltmeter, Hewlett-Packard 400D.

special care must be taken to avoid con­tact where high voltage is present. RE­

c. Oscilloscope, Dumont 304H. MOVE PRIMARY POWER before changing tubes.

5.3 BENCH E AND ALIGNMENT

5.3.2 SELECTIVE VOLTMETER CALIBRATION Follow the steps below in sequence when calibrating the 476J-1. Perform bench test and alignment pro­ a. Turn function selector switch S105 to the cedures at three month intervals and subsequent to VTVM position.shipment to correct misalignment caused by ship­ment or tube deterioration. b, Turn FREQ RANGE switch S103 to the 4 - 60

kc position.5.3.1 WIDEBAND VOLTMETER (VTVM)

CALIBRATION c. Tune the instrument to the 50 kc dial indica­

tion for a maximum meter deflection. a. Remove the bottom cover plate from the in­

strument by loosening the two knurled thumb screwS, d. Adjust CAL 2 potentiometer R156 for a 0 db

indication on the meter. b. Connect an oscillator and a vtvm to the input

of the 476J-l as shown in figure 5-1. Place a 600 200CD 400D 4 7 6,, ­osc VTVM SELECTI'JE

ohm load termination across the line. VOLTMETER 600n o

c, Adjust the oscillator for an indication of 0 db on the vtvm.

d. Turn the INPUT switch S102 to the Xl, 0 db position.

Figure 5-1.

U91 0001 I

Selective and Wideband Voltmeter 476J-l. Calibration Equipment Assembly.

11

Section V JVhintenance

The instrument now provides equal gai n in the VTVM or SEL VM positions.

5.3.3 SO KC OSCILLATOR LEVEL CALIBRATION. When calibrated in the following manner the 50 kc oscillator can be used fol' an internal calibration reference signal.

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

b. Adjust the dial for maximum meter deflection at 50 kc.

c. Adjust CAL 1, R180, for a 0 db meter indi­cation.

The 50 kc oscillator is now adjusted to the correct level.

5. 3.4 OUTP UT AND METER LIGl\ MEl\T

a. Switch the function selector S105 to the CAL 1 position.

b. Adjust rheostat R184 for a 0 db meter incli­cation.

The last three stages of amplification, VI07 and VI08, and the meter are now properly calibrated to correspond to the 50 kc oscillator calibl'ation.

5.3.5 lORlVIAL CALIBRATIO:\'. After completing the steps of al ignment in the preceedi ng paragraphs, and prior to using the 476J-l for test purposes, again perform the steps of calibration outlined in paragraph 3.3.

5.4 TROUBLESHOOTING

Under conditions of normal operation the 476J-l will

not reqUire more than the routine maintenance spe­

cified in paragraph 5.3. The tube complement used has long life characteristics Perform the steps of bench test and alignment outlined in paragraph 5.3 before attempting to troubleshoot the instrument. If the instrument does not function properly, follow the general outline below to help locate the malfunc­tioning part or stage. Refer to figure 5-1 for locations of electrical components.

a. Remove the protective covers by loosening the 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 does not function:

d. Attach an oscillator, tuned to 5 kc, to INPUT terminals EI01 and EI02. Adjust the input signal level to +20 db and the INPUT level switch S102 to the +20 db position.

e. Monitor the oscillator output signal by placing the leads of an oscilloscope across INPUT terminals EI0l and EI02; then adjusting the vertical input con­trols on the oscilloscope to show a low-amplitude sine-wave form.

f. Place a probe on one of the oscilloscope leads and trace the signal through the circuit from the Ii\PUT terminals to the output stage. Vary the oscil ­lator output level at each check point to verify proper operation. When the malfunctioning circuit is located:

g. Perform d-c voltage and resis tanc~ measure­ments to locate the circuit component which is not functioning. Table I lists the normal operating voltages. Resistance values are shown on figure 5-2.

TABLE 1. AVERAGE D-C OPERATT;-JG VOLTAGES*

I Tube VIOlA, B VI02 VI03 VI04 V105 VI06 IV1 07 A V107B V10SA VI0SB VI09 VIlO

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

I I

E - 120 I

120 150 100 150 - - - - 120 -g2 I

E 90 150 100 210 100 :2.10 80 210 160 145 125 150P

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

12

I R204 402

I I I I S 102A

I 10 634

---. •• 'VVv ~ .",6-­ "'1\. 2

200

1120.

\ 20K I~

I'"\ 634

1120. 20K

\ R202 ZOK

\ IIZIO " 21419.IK .02

11203 11211

BAL

8.,\1

,.", ~ _-= I

L101 - \ -, - - ~ \

~

%•I ~ ...J CD

CIOI 0.2

~

...J CD

51018

1111'

-~~-

\ \ ­

SIOIA

r--"'"1 C158 ~ ::;:: .01

11101 1"1021"1031"1041"1051"106 619 152 75 198 1635 711

.. 150V DC

+250V DC

I L

,-- ­I I I liED

IINPUT I

EI02(Q~_B_LU-....:.._-,-\-_--1- ./'

I 1\ / 1\ r / T

EIO)

~

'8""4 5 V 102

4 5 VIO)

'E3"'"4 5 VI05

4 5 V 106

4Q5VI09

9 S 4 VI07

4~108

S.)V AC

•

e'

e

e

., e

-- --- ----..---r CI71

10 UU, 11110 ZOK

11204 13.1K -

C16'

I

CI70

51028

11113

T~4~ ;\ ~

'.0'

\ 318.5

UNBAL - "212 4.32l

-L_ \ -- --- -- -- --'- -- -- --J

TIOSC 17 4 VEL-BIIN 0.1 liED 8L ,40V O-------lIr 0 2BOV AC

liED 220'", AC3COV~

_RED-8LU 280V~ ~160VAC

~O'VEL260V~11 Ol40VAC

D-BLU 125V AClilt

PINK 110 VAC ~

5101 5 5K -:L .J!C1598

CI511A T _ T 50 VIIO AfO-VEL50 ~ OA2

e 8UJ

SI06

CII1I2CRill

\ ~ ---- --

'\ -- -- --- -- _Ji

\ ~ 5102

08 ~ 08 +10PIOI

+20 ,. -.~ ~ JJ.- .', ~::+30

+40 100--' - A - .......­ -30

CALZ", /? ~ 10.0.01-40

VIO

I \:~'~11\ ~

\ I \\1

\1

1\

---- - -

CI04 h.001~ RI16 II ­

~ 4K

CI76 ,Clth°.50 .1 r ~iOI ...., 1000/5000UUF ,- - - -- --RM-=I-- -- -- -- --I, r FLIo2 l

L....-

""

RII8 <; AT 101 L P 8 P I I I I I1000~

~ ATI03 E83F/111I95105 B

•50B/300.l\. J ATI02 CRIOI 30B/150.l\. 800KCI I

-, 30B/150J\. I 17"'~"_ VI03CI08 6~ -'­ , ~13~_HOOI ...LVIOIB CI06[ JC;107 2 4 I I II . I '.' I IIR,'3 3 148 • .001 CI09 ,', ...AAA_IL Fl1301000 t ­.­~;8 -' JVV'I 2./11, I I I I I ,..100 R 123RII9 rI $ ;v~121

II ~ I I3

( SFll31

j I I I I :? 16211

121RI20J... CI02 ~ R121 .0RI22T 002 1001< T;I~O ~121~ t' 'tl ' !" , ,"T -=- TT' - - -C 112 ---lL -T • T T

15011 DC IIT:-n L ,j I ~eF~ I L __ J...

51058 I L. ,•5· 3;:1 ~.6 ~ 1.-0-­ II\

\ J J IT 104

\

4

\~ 6

lI06

~ 4

5

c

6 138/275

....L UUF

S103I ~ I/ Fll72 R203\ I

I 711 K~ 500 -- 3000.1\. I 4

4 3 411 2

\ // 'I cr 1 r_II II PHONESe" I SEl lllol J )~ IE 83F/6689• I

FUNCTIONIITIiFlI• C'47 9SELECTOR 497 CAL I I• SI05

... CAL 2 LIOfllO~ L10j.lI02 I r""' '" I I

~ C 146 804 '15501<C II' "" "" II~ 3 6000 I I

2 UUF I

I :j IICI44 C 145 I 261.5 6000 , L 108 WF UuF

CI37 CI43

* * :: I I

150-3' 5103 300-450'­ . 60- <t.. • 400-600

I ,-.- a --""-"'-1 .. IDIAL CAL I

L_ I--- --- --- --- -- ---."-- --- --- ---- --- --- ---- --- -- I ­I

.. : ~

- . ........

• '.. • • ._. • II ,

i AM-2 I I I ~: ~

A A A

ECC81/6201',:' C 115

~ A I~ 6 ~L '.2.­r -- -- ...,l'20K" -- --, 6,8. CI2l r- WOrFLiOz l A'34 r FLI03 l I FLI04 I I ",.. -1~7501( ~

51.111 I 8P I - IlP I I IPE80~/6084 _

808:KC E811'1 •• 8') 800llC CA 105 . I 15KC 5 I 15KC

\1105 I I I I I

I-B-rl l~ L ~Z.;,':;:16:.;.K:.:.A~_(), 2 ~ K... Z . I K ... r ' ~-r

I I :1.J lI I I'VV~~ I 1 I • ,I : II I I ..~ AI31I I +..LC I 26 CII6'-1' ""- ":' : I I. 'I '> IS 16.211 ~ 10 .2 T ISA 132>

IT 162r-n-o' · I "C1I9

AI47 T 10n-O I I 1l /A~~2 I <: AI49

~ 100I I 'I IIh / I I I I I

1M ~ rrI 1

T T AI521 :1 r- rr -- ,-- r 68.11{ TL _L __ J L __ -.J ATIOS l.:. __ ~ L L_-1

1~8:~SO.n. I I vvv _J__

vvv / r-------- ­--, ~ > i -,+ 250 VDC ...

~ T '04

AA

~ Elll~/6689

~\I102

~=J' -"""""-'3 V~O

804 -,5'0IlC

~"" ...... -.J

!MER

I-- -- -- -- -- - ­

\" II

'I 50 KC OSCILLATOR AI87

- ---J...-' ISELEC11VE VOL T ME:: TER RANGE I I 4.42 K l~ ILI09 2 A,--­ -1-6 -( ... a.2 785KC V3 I ~

"e5104•< OSCIL LATOR -20061<)OMV 10MV -30DB I I

vv CI67

AI99 C 165 1257 ~ CI,4T1 0.1 UUF

~tJ ~~g021~1I ~ 4.4211 - 40 DB RI18 ! .0032I II

I -I: :C:::--e.~ • 10MV 40.2K"'--lMII - 50 08I

I '=

I ~ I

.Jo---­

CAL 2 - 60 DB--e 'Vi ...--' MV E83F/6"9 S II -= I VI06:I -1,'I' lC£"~IEOO I

I9I I III • I

I I I 1~ II 200

t;5 ~~ '"

I RI85 I.6 S'05A I511 I I,l ~~C I I

~C168I+2'OV DC

I ~c I 66I 242

I VI02I """'" 122' ~ 715KC.J.-CIU

UUF A201UVI'-~ I 1621( UUF lzz.5 I I

CIS7 RI86 I-II

III T';:;~U'J ~ 00" II II ~ RI78S

/ L~ _ _: O,J_-0-=---J C 155 48.7K>

56 UU~ \1 II

/ 1 CAII6 ~ 10K"j9

/ i / ...L. CI56 =- .005

~ 11 /

CIH

Hh-:r:::­!\ -R193

1\7 100• & &

~vvv

" Vi07B C 120 05 11194

t/ a'ClO... ,r-vvv

~ A A &

VVV RI~5

IN~

~--I

L III z I

I I

89 :5 I I I I I I

fL IO~ V20KAI FLIOSl ,::C I ~ I

r-J"'OI 3TP~I I 300

I I ATI04

908/150.1\. 1 1:;:';: .. A."'V",V

I I ~ If

2 •

iI I j

I T L __ .J

l ~1I171 ~'50

(: "'51 F R \. 6b ~ 6.811{

CI21A 50 E RI59

5.IIK .,. 42.21{~ r,Z41 q'."lln"169

IIVIOBA £CCS/blO I

VIoe8CI61 - __~

_ 02

16~S 7;n~~, --­8

~ C'058

11163 ~ ~.

~~~ I ~C.:7J 50

• ..2 51"(· 511K :? • 50 n '-InSO (~"r~'lbl

RI67 ~ C177-1.­70.65 10"0.........133

UUF

A192~2.•'1{ IN" (;11,,,

~

i 1.4 "­

-• • ... • Z~O voc

'\N\ RI91

1000

,l) 2 1

3~ .,

- 5 .'ICAL I I 11180 ""­300

A A .. "­VfV---~ "'­

7rII

C 123 51058 001

. 51058 SI05A~'~ ~

Sl05A

6 CIIIIO

6 .CAlli5--­4 ......-< A 170

S 2001{ 3 ----..

2~ • I -(\1)+ •

1\11101

C129...L c0.5 ""T'" ~a130 ...,.. 1,.5

~o, IPHONES I

II' '"

"

'. RI81 ,#1"', "'­I

'...' 16 K AAA yVVV

~R182 (:111 8 3 <:--R'8.

I ~16K ~806~ .150 ..... N[IlT ASSY 1 Q' T Y r USED ION 11Il0 DrSCII'T'OIll

II 178 <: r IN T CAL ~5J CI55

~-- 48.7K ~ APPLICATION ~lJUF

\1

/ AUTHENTICATION IT ITLE 11119 ~7r t

CII 116 101C DIUWII IY SELECTIVE AND WIDEBANDJ HARDIN t- ­.. C"(CItEDI: PARTir

\1

IY'-' VOLTMETER -=- 005 -L. CI56

A"II0V£D IY 'II0JECT 476J-1

'.1) £1I1.Nrrll C. CRANOR ~SHEE oa"( ellSDIIAWII FEB. 1,1959I-----_J I

'7

TFIGURE 5-2

il

•

o 564 0520 006

Cl 30 ').5

C ~ II'

,., CI

4

IPHONESI

C 129 0.'

5

(;

I~~V)+ •

SI05A

CRIIO

11,70 2001\

.250 \I DC

C 058 !>o

t 8 ~ F 166ll'.l

VI09

11117 1000

C i2 3 5::>

vloe8............. CI61

02

R ISS

~II It

RI91

1000

~162

133

'AI

, - SluSS

Cl23 001

2

I .]

4

I ., ._

, ' S 1058

4

3. SI05A

)

"

APPLICATION --­

AUTHENTICATION IT ITLE

NEX" ASSY IlEVI.'OII

110

564 0520 006

CLISTOMER NO.

SHEET. OF SHEETS

PART NO.

REVISIONS

COLlIIS'RADIO COIPAIY DALLAS, TEXAS

OES'"''''''OII110

476 J-I

VOLTMETER

USE D 10 II

SELEtTIVE AND WIDEBAND

FEB. 1.1959

J HARDIN

C. CRANOR D"~E DIl".1I

......"OVED IY

""OJECT EIIIIIIEE"

CHECItED IY

D""WN IY

/ /

~

184

50

"0 INT CAL

FIGURE 5-2 13

SECTION VI AR S LIST

6.1 PART LIST

I

I

I

ITEM

ATIOl

ATl02

TI03

ATl04

ATl05

ClOl

Cl02

Cl03

Cl04

CI05

Cl06

Cl07

Cl08

Cl09

ClIO

Clll

C1l2

DESCRIPTI N

ATTENUATOR PAD:

Same as ATlOl

ATTEI UAT R PAD:

TTEI\TUATOR PAD:

ATTE TOR PAD:

CAPACITOR, FIX D, PAPER: 0.2 fif, fixed film, ±10% vdcw 300

CAPACITOR, lVIOLDED, FIXED, CERAMIC: 2000 fifif

CAPACITOR, FIXED, FILM: . 1 fif 3 0 vdew

CAPACITOR, FIXED, TUBULAR CERAMIC: . 001 f.Lf, 350 vdcw

CAPACIT R, FIXED, DUAL AL MINUM ELECTROLYTIC:

50-50 f.Lf, 350 vdew

CAPACITOR, FIXED, ALUMI JUM ELEC ROLYTIC:

8 f.Lf, 350 vdew

Same as Cl04

Same as Cl04

Sam as Cl06

CAPACITOR, FIXED, PAPER: .005 f.Lf, 1 0 vdcw

CAP CITOR, VARIABLE, CERAMIC: 10 fif.Lf, 500 vdcw

Same as Clll

.

TELLETRA

PART NUMBER YSA-3, APP9780, CEI 2 -;- 5 db, 150 ohms

SA-3, Gr. 6653 CE2, 7 db, 600 ohms

VSA-3 APP 780, C 3 I

7 :- 10 db 150 ohms

VSA-3, Gr. 6653 CEl, 2 7- 8 db, 300 ohms

I

j.

COLLINS

PART NUMBER

15

. eclian VI

Parts List

I DESCRIPTION TELLETRA COLLINSITEM

PART NUMBER PART NUMBER Cll3 CAPACITOR FIXED, FILM:

v

0.1 fl.E, 350 vdew, -5%

Cll4 CAPACITOR, FTXED, F M; .002 !JoE. 150 Ydcw

CllS CAPAClTOR, FIXED, FILM: .01 fl.i, ±10%. 1000 vdew

CllG Same as C101

Cll7 CAPACITOR. FIXED, FILM: .001 p.r, 1000 vel \Y, ±10%

CllS ame as C1l4

CllY CAPACITOR FIXED. AL r , ELECTR LYTIC:

10 p.f, 25 vel

C120 CAPAClTOR. FIXED, FILM: 0.5 flf, 350 vel \V

C121 CAPACITOR, FIXED, AL MI UM . EC ROLYTIC; fiO-50 !Jof 400 vdew

C122 CAPACITOR. FIXED, FILM: 0.2 flr. 35 vdcw

C123 CAPACITOR, FIXED, AL UNUM, ELECTROLYTIC: I

I

60 fif, 12 Ydcw

C124 Same as C123

C125 NOT USED

C1 Same s CIHJ

C127 ame ClOG

Ci28 CAPACITOR, FIXED. FILM; 001 IJ.f, 1000 vdew

,

I

C129 CAPAC!. OR, FIXED FLM: O. 5 fJJ'. 350 vdew

Cl30 Same as C129

I i I

1&

ction VI arts List

ITEM

C150 I NOT USED

Cl51 I NOT USED

CI52 I NOT USED

Cl53 I NOT USED

DESCRIPTION

CI54

CI5S

CI56

CAPACITOR, FIXED, FILM: .0032 0. 350 vdcw

CAPACITOR, ~, CERAMIC, T 56 p.p.f, 500 vdcw

CAPACITOR, FIXED. FILM: . 005. jJ.f, 1000 vdcw

ULAR:

Cl57 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:

24.8 IJ+li

C15S I CAPACITOR, FIXED, CERAMIC: .01 Il-f, 1000 VdC\l

Cl59 I CAPACITOR, ALUMll\UM. ELECTROLYTIC: 50 0. 400 vdcw

CIGO I CAPACITOR, FlXED, ALUMINUM, ELECTROLYTIC:

50 Il-f, 25 vdcw

CIGI I CAPACITOR, FIXED. FILM: 02 Il-f, 1000 vdcw

C162 I Same as C113

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

122.5 flll-f

Cl64 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:

817 1·li·.I.!

Cl65 I Same as C1l3

Cl66 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC:

242 f.LUf

C167 I CAPACITOR, FIXED, TEMP., COMP., CERAMIC: 12570 flIl-f

TELLETRA PART NUMBER

,

COLLINS PART NUMBER

1

..

c tion V1

Part- Li t

ITEM

Cl50 NOT SED

DESCRIPTION TELLETRA

PART NUMBER

COLLINS

PART NUMBER

C151 NOT USED

C152 NOT SED

Cl53 NOT USED

C154. CAPACITOR, FIXED, .0032 !-Lt, 350 vdcw

FILM:

C 55 CAPACITOR. FIXED, 5G f.l.f.l.-f, 50 vdcw

C RAMIC, T ULAR:

Cl56 CAPACITOR, FIXED, • 005. jJ.f, 1000 vdcw

FILM:

"­

C 57 CAPACITOR, FIXED, TEMP., COMP., CERAMIC.

24.. 1J.jJ.£

CIS8 CAPACITOR FIXED, .01 fJl, 1000 vdcw

CERAl\fiC:

C159 CAPACITOR, ALUMINUM, 50 jJ., 400 vdcw

ELECTROLYTIC:

C16 CAPACITOR, FlXED ELECTROLYTIC:

50 lJ-I, 25 vdcw

ALUMINU ,

CIGI CAPACITOR, FIXED, .02 fJ-f, 1000 vdcw

FILM:

Cl 2 Same as Cl13

CI 3 CAPACITOR, CERAMIC:

122.5 fJ-l-lf

FIXED, TEMP., COMP.,

C1 4 CAPACITOR, CERAMIC:

817 )-LlJ-f

FIXED, TEMP., COMP.,

CIG5 Same as C1l3

C166 CAPACITOR, CERAMIC:

242 flUf

FIXED, TEMP., COMP.•

C16? CAPACITOR, CERAMlC. 12570 jJ.1-li

FIXED, TEMP., COMPo

18

Section VI Parts List

ITEM DESCRIPTION TEUETRA

PART NUMBER COLLINS

PART NUMBER C131 CAPACITOR, VARIABLE, VERNIER­

DRIVE , MAIN. T NlNG: 4-12 Wf; Telettra Gr. 4555/1

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

C133 CAPACITOR, VARIABLE, CERAMIC: 6-30 !-Lflf

C134 CAPACITOR, CERAMIC, TEMP., COMP.: 354 flflf

I

C135

C136

Same as C133

C ACITOR, CERAMIC, TEMP. COMP.: 320 flf.lf

C137 Same as C133

C138 CAPACITOR, TEMP., COMPo , CERAMIC: 275 Wf

VSA-2, Gr. 6653/T.22

C139 Same as C133

C140 C ACITOR, TEMP., COMP., CERAMIC: 224.5 flf

VSA-2, G4. 6053/T.22

CHI Same as C133

C142 CAPACITOR, TEMP., COMP., CERAMIC: 354 !-Ltd

VSA-2, Gr. 66S3/T.22

C143 ame as C133

C144 CAPACITOR, TEMP., COMP., CERAMIC: 261. 5 Wf (2)

VSA-2, Gr. 6653/T.22

C14 C PACITOR, PRECISION CERAMIC: 6000 f.lf.Lf, ±l. 2%, 250 vdcw

C146 Same as C145

C147 CAPACITOR, TEMP., COMP., CERAMIC: 248. 5 f.l!-Lf (2)

VSA-2, Gr. 6oS3/T.22

C14 CAPACITOR, FIXED: 0.2 flf, 350 vdcw, ±10%

C149 CAPACIT R, FIXED, CERAMIC: O. 2 jJ.f, 400 vdcw

17

ee ion VI Pa t List

ITEM

ClSO

Cl51

C152

Cl53

C154

C155

C156

C157 '"

Cl

C15

C160

Ci61

CI6

163

CI64

CI65

CI66

Cl67

NOT USED

OT USED

rOT USED

OT USED

CAPACITOR, .0032 IJ.f,

CAPACITOR, 56 IJ.lJ.f, 500

APACTTOR, • 005. IJ.f,

CAPACITOR,

CERAMIC: 24. f!+lf

CAPACITOR, .01 IJ.f,

APACITOR, 50 ~.Lf.

CAPACITOR, ELECTROLYTIC:

50 IJ.!,

CAPACITOR, .02 IJ.f, 1000

Same as Cll3

CAPACITOR, CER C:

122.5 f!+lI

CAPACITOR, CERAMIC:

817 ~f

Same as Cll3

CAPACITOR, CERAMIC:

242 f-W.

CAPACITOR, CERAMIC' 12570 IJ.fll

TRLETRA COLLINSDESCRIPTION

PART NUMBER PART NUMBER ::­

FIXED, FILM: 350 vdew

FIXED CERAMIC, TUBULAR: dew

FIXED, }'ILM: 1000 dew

FIXED, TEMP., COMP.,

FIXED, CERAMIC: 1000 "dew

ALUMIN , ELECTROLYTIC: 400 vdew

FlXED, ALUMINUM,

25 vdew

FIXED, FILM: dow

FIXED, TEMP., COMP.,

FIXED, TEMP., COMP.,

FIXED, TEMP., COMP.,

FIXED, TEMP., COMP.,

I

18

Section VI Parts List

ITEM DESCRIPTION TELLETRA

PART NUMBER COLLINS

PART NUMBER C168

C169

C170

CRIOl­CRI04

CR105

CR106­CR109

CR11O­CRIll

CRlI2­CRU

CR116

CR117­CR120

DSI01

00102

F101

FI02

FLI01

FLI02

FL103

FLI04

FLl05

CAPACITOR, FIXED, TEMP., COMP., CERAMIC: 1225 fJ+J.f

CAPACITOR, VARIABLE, CERAMIC:

Same as C169

CRYSTAL DIODES:

CRYSTAL DIODE:

CRYSTAL DIODES:

CRYSTAL DIODES:

SELENWM RECTIFIERS:

CRYSTAL DIODE:

Same as CRIl2-CR115

LAMP, MI ATURE, BAYONET: o. 7, 6.3 vac

Same as DS101

FUSE, 1/4 A, 250 v

FU E, 2A, 250 v

FILTER, LOW PASS: 750 kc

FILTER, BAND PASS: 800 kc

FILTER, BAND PASS: 800 1c

FILTER, B 1) PASS: 15 kc

FILTER, BAND PASS: 15 kc

VSA-3, 82081/10E Phillips

VSA­ ,P. 13155

VSA-3, P.7821

Same as CR101-CR104

Same as CR105

VSA-3, P. 11400/10

Same as CR105

VSA-3 Gr. 9861

VSA-3, Gr. 9857

VSA-3, Gr. 9858

FSA-3, Gr. 9859

VSA-3, Gr. 98GO

I

262 3240 00

264 4020 00

2644070 00

19

~l'etiol1 Vl

P:-I1"t: Ligt

ITEM

JIOI

DESCRIPTION

PHO.:E JACKS:

TELLETRA

PART NUMBER

VSA-3 Gr. 9

COLLINS

PART NUMBER

LlOl r.;D CTOR. RADIO FREQ E, CY: VSA-3. Gr. B.27613, Ll

961.

Ll02 1 mGCTOR, RADIO FREQ E, CY: VSA-3, Gr. 6653, B.339 I, L1

Ll' nm CTOR, RADIO FREQUE CY: VSA-3, Gr. 6653 .3 9 2, L2

Ll04 I ~D CTOR RADIO FREQ ENC~: VSA-3, Gr. 6653, B.33963, L3

105 IND CTOR RADIO 'REQUE CY: SA-3, Gr. 6653, B.33964, L4

Ll06 I 'DUCTOR. RADIO FREQUE CY: VS B.

- • G .6653. 396 , L5

LI07 I JDUCTOR, RADIO FREQUEJ CY: VSA-3, B.3396

Gr. 6653, , L6

LlOS m CTOR, RADIO FREQU NCY: VSA-3, Gr. 6653, B.33561. L7

L109 IND CTOR, RADIO FREQ CY: VSA-3, Gr. 9852 B.371 4, L1

LUO INDUCTOR, RADIO FREQ UE CY: VSA-3, Gr. 9851 B.33961, Ll

Llll IND C OR, RADIO FREQ E CY: VSA-3, Gr. 2372 P.33962. 2

Ll12 INn CTOR, RADIO FREQ E CY: VSA-3. APP.9780 1. 402. 02 11

PI01 P UG MALE -Conn ctor, ac:

Rl RESISTOR. FIXED, 619 ohms. :to. 5%.

FIL 1 w

RI02 RESISTOR. FIXED. 152 ohm • ±O. 5%,

FI 1 w

RI03 RESISTOR, FIXED. FILM: 75 ohms, :to. 5%. 1 "

R104 RESISTOR. FIXED, 9 o!mlS: ±O. 5%,

FILM:

1 "

20

•

I

SGction VI

Part List

ITEM

RIO.>

RIOo

-RI

RIO

RI09

RllO

RIll

R1l2

Rll3

R1l4

RU5

Rl1G

Rl17

Rll

R1l9

R120

R121

DESCRIPTION

RESISTOR, FIXED, FILM:

163.5 ohms, =0.5% 1w

RESISTOR, FIXED, FILM: 7 .7 ohms, ±0.5% 1w

RESISTOR. FIXED, FILM: 124 ohms, -0.5%, I \V

RESISTOR. FIXED, FILM: 2740 ohms, ±2%, 1/2 w

RESISTOR, VARIABLE,I JOO -INDUCTIVE:

5.000 ohms, ±10%, 2 w

RESISTOR, FIXED, FIL 20,000 ohms, ±0.5%,

RESISTOR. FIXED, FIL II: G340 ohms, ±0.5% 1/2 w

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

RESISTOR, FIXED, FILM: 34 ohms, ±0.5%, 1/2w

ESISTOR, FIXED, FILM: 200 ohms, ±0.5%, 1/2 w

RESISTOR, FIXED. FILM: 63. '* ohms, fa. 5%, 1/2 w

RESISTOR FIXED, 400C ohms, + %, 10 w

RESISTOR. FIXED FILM: 4750 ohms, I2%, 1 w

RESISTOR, FIXED, FILM: 1000 ohms, ±2%. w

RESISTOR, FIXED. FILM: 100 ohms, =2%, 1/4 w

RESISTOR, FIXED, FILM: 121 ohms, ±0.5%. 1/2 w

RESISTOR, FIXED FILM: 100,000 ohms, ±2%,

TlLLETRA COLLINS PART NUMBER PART NUMBER

WIRE-WO ND,

:

1/2 w

WIRE WOU D:

1/2 w

21

Section VI Parts List

ITEM

R122 Same as R120

DESCRIPTION ULLETRA

PART NUMBER COLLINS

PART NUMBER

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, 10,000 ohms

FIXED, FILM:

R127 Same as R126

R12 RESISTOR, FIXED. FILM: 715 ohms, ±0,5%, 1/2 w

R129 Same as R128

R130 Same as Rl18

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

R136 RESISTOR, FIXED, FILM: 13,700 ohms, ±O. 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, iO.5%, 1/2 w

22

Section Vl Parts List

I.

ITEM DESCRIPTION

R141 I RESISTOR, FIXED, FILM: 43 2 ohms, ±O. 5%, 1/2 w

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

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

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

RI45 I RESISTOR, FIXED, FILM: 100,000 ohms, ±2%, 1 w

R146 I RESISTOR, FIXED, FILM: 2740 ohms, iO.5%, 1/2 w

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

Rl48 I RESISTOR, FIXED, FILM: 825 ohms, ±2%, 1/2 w

R149 I RESISTOR, FIXED, FILM: 100 ohms, ±O. 5%, 1/2 w

R150 I Same as R149

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

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

R153 I RESISTOR, FIXED, FILM: 249 ohms, iO. 5%, 1/2 w

R154 I RESISTOR, FIXED, FILM 1000 ohms, iO. 5%, 1/2 w

R155 I Same as R147

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

R157 I RESISTOR, FIXED, FILM: 10,000 ohms, i2%, 1/4 w

RISS I RESISTOR, FIXED, FILM: 810 ohms, ±2%, 1 \V

TELLETR PART NUMBER

COLLINS PART NUMBER

23

Section VI Par s List

<C

ITEM

R159

DESCRIPTION

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

,

TELLETRA PART NUMBER

COLLINS PART NUMBER

R160 RESISTOR, FIXED, FILM: 8250 ohms, ±2%. 1 w

RI6l RESISTOR, FIXED, FILM: 10, 000 ohms, ±2%, 1 w

R162 RESISTOR. FIXED, FILM: 133 ohms, -0.5%, 1/2 w

I

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

RI64 RESISTOR, FIXED, FILM: 162 ohms, -2%, 1/2 w

R16S 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 Same as Rl6I

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

I

R170 RESISTOR, FIXED FILM: 200,000 ohms, ±2%, 1/4 w I

Rl71 RESISTOR, FIXED. FILM: 150 ohms, ±O.59i, 1/2 w

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

R173 RESISTOR, FIXED, FILM: 1000 ohms, ±2%, 1/2 w

Rl74 RESISTOR, FIXED, FILM: 100,000 ohms, ±2%, 1/2 w

R175 NOT USED

R176 • OT USED

Rl77 NOT USED

24

Section VI Parts List

ITEM DESCRIPTION TELLF"RA

PART NUMBER COLLINS

PART NUMBER R178 RESISTOR, FIXED, FILM:

4 ,700 ohms, -2%, 1/2 w

R 7 RESISTOR, FIXED, FILM: 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 RI81

ID8 RESISTOR, FIXED, FILM: 80.6 ohms, ±O.5%, 5 w

R184 RESISTOR, VARIABLE, TAPPED, WW: 3 0 ohms, 10 w

RI85 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

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

RI89 RESISTOR, FIXED, WW CERA1\IIIC: 5,000 ohms, 10 w

R190 RESISTOR, TAPPED VARIABLE, WIRE WOUND:

1000 OhnlS, 10 w

R 91 RESISTOR, FIXED. FILM: 1000 ohms, to.5%. 1/2 w

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

Rl93 RESISTOR, FIXED, FILM: 100 ohms, ±2%, 1/4 w

R194 Same as R193

RI95 RESISTOR, FlXED. FILM: 1000 ohms, ±2%, 1 w

25

'~ctio VI

Parts LIst

ITEM

R196

DESCRIPTION

RESI TOR, FIXED, FILM: 6 '10 ohms, ±2%, 1 w

TELLETRA PART NUMBER

COLLINS PART NUMBER

R197 Same as RI95

ID9 RESISTOR, FIXED, LM: 40,200oh.nLs, ±O. -%, 1 w

RUl9 RESISTOR, FIXED, FILM: 4420 ohms, =2%, I w

R200 Same as RISS

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

R202 Sam as R19!

S101 SWITCH, ROTARY, WAFER: Double-pole, 9-positi n, 3-wafer, sin Ie terminal shorting

1 2 SWITCH ROTARY, WAFER: Single-pole, 10 p 'ition, single wafer, si Ie term.inal shorting

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

8104 SWITCH, ROTARY, WAFER: Smgle-pole, 8-position, single wafer, single terminal sorting

Sl05 SWITCH, ROTARY, W FER: 3-pole, 6-positiOll, double wafer, sin rle terminal shorting

106 SWITCH: Sp t ggle

8107 SWITCH: Spdt toggle

TlOl TRANSFORMER, RADIO RE UE CY: VSA-3, Gr. 9865

T.412.120

TI02 TRAl'SFORMER, RADIO FREQUE CY: VS -3, Gr. 6653, T.399.51

TI03 'fRA J8FORMER, RADIO FREQUENCY: VSA-3, Gr. 6653, T. 413.155

26

I

Section VI

Parts List

ITEM

TI04

TI05

VIOl

VI02

VlO3

VI04

VI05

VI06

VI07

VI08

V109

VllO

DESCRIPTION

TRANSFORMER, RADIO FREQUENCY:

TRANSFORMER, RADIO FREQUENCY

TUBE, MINIATURE, 9-PIN: ECC88/6922

TUBE, MIN1ATURE, 9-PIN: E83F/6689

Same as VlO2

Same as VI02

T E, MI ATURE, 9-PIN:

E80F/6084

Same as Vl02

I TUBE, Ml IIATURE, 9-PIN: ECC81/6201

Same as Vl07

Same as V102

TUBE, OCTAL, 8-PIN, GLASS: I OD3

I

I

TELLETRA. PART NUMBER

VSA-3, Gr. 6653 T.398.56

VSA-3, Gr. 2374 T. 400.164

COLLINS PART NUMBER

255 0332 00

255 0355 00

,

255 035400

255 0218 00

255 0001 00

~

I,

27

5 June 1959

ADDENDUM SELECTIVE AND WIDI1:BAND

VOLTMETER 476J-1

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

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

(1) Fuse, l/4A, 250V CPN 2644020 00

Add: (1) Capacitor, Fixed, Film. 0.5uuf. (Cl71)

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

(1) Capacitor, Fixed, Film. 0.1 uf, 1000 vd '\ • (C174)

(1) Tube, glow-discharge diode voltage regulator, 7-pin miniature. CPN 257005 00

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

(1) Capacitor, Fixed, Film: 3.3 uuf (C173)

(1) Capacitor, Fixed, Film: 3.3 tIuf (C175)

(1) Capacitor, Fixed, Molded, Ceramic: 1000 ±5000 uuf (value optional) (C176)

(1) apacitor, Fi ed, lVloldecl, Ceramic: 1000 uuf, 150 v (C177)

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

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

Change: Attenuatol' Pad AT101 from 150 ohms to 300 ohms

Attenuator Pad AT102 from "same as A1'101" to VSA-3 APP9780, CE2, 3 db, 150 ohms

Attenuator Pad AT103 from 7 db, 603 oluns to

3 db, 150 ohms

Attenuator Pad AT104 from 10 db to 8 db

AttcllLwtor Pad AT105 from 300 ohms to 150 ohms

5 Jun 1959

ADDENDUM SELECTIVE D WIDEB ND

VOL METER 476J-1

Section . 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. 0.5uuf. (Cl71)

(1) Capacitor, FL"ed, Electrolyti. 50 uf, 12 vdcw. (Cl72)

(1) Capacitor, Fixed, Film. 0.1 uf, 1000 vdcw. (C174)

(1) Tube, glow-discharge diode voltage regulator, 7-pin miniature. CPN 257 0052 00

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

(1) Capacitor, Fixed, Film: 3.::J uuf (C1 i J)

(1) Capacitor, Fixed., I"ilm: 3.3 Huf (C175)

(1) Cupacitor, Fixed, l\lolded, C:;ramic: 1000 ±5000 uuf (value optional) (C176)

(1) Capacitor, Fixed, Molded, Cerfimic: 1000 uuf, 1.,0 v (C177)

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

(1) Re::;istor, Fixed, Film: 402 ohm::> ±l%, 0.5 w (D 20-1)

Change: AttenuataI' Pad AT101 from 150 ohms lo 300 ohms

Attenuator Pael AT10l [rom Its ne a' AT101" lo . S -3 APP9780, CE2, 3 db, 150 ohm

Attenuator Pael AT10,: [rom 7 db, 60~ hm to

3 db, 150 ohm::;

Attenuator Pad AT104 from 10 db to 8 e1b

AttenuataI' Pad AT10S [rom 300 ohms to 1.,0 ohms