Magnavox CMX 49545 User Manual Download

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Summary of Contents for CMX 49545

Page 1: ... r NAVSHIPS 900 853 INSTRUCTION BOOK for SPEAKER AMPLIFIER NAVY TYPE CMX 49545 Ma mfactrtred for U S NAVY DEPARTMENT BUREAU OF SHIPS 6 THE MAGNAVOX COMPANY Fort Wayne Indiana I _ _ _ _ _ ...

Page 2: ... BOOK for SPEAKER AMPLIFIER NAVY TYPE CMX 49545 lHallufaClm ed for U S NAVY DEPARTMENT BUREAU OF SHIPS by THE MAGNAVOX COMPANY Fort Wayne Indiana L _____________________ ____________________ CONTRACT NXsr 93879 Approved 1 JULY 1946 ...

Page 3: ...NAV5HIP5 900 853 Front Matter A I ...

Page 4: ...aker Amplifier Navy Type CMX 49545 NAVSRIPS 900 853 1 NAVSRIPS 900 853 is the instruction Dook for the sUDje ct equipment and is in effect upon receipt 2 When superseded DY a later edition this publication shall be destroyed 3 Extracts from this pUDlication may be made to facilitate the preparation of other Navy instruction books and handbooks 4 Copies of this pUDlication may be oDtained from the ...

Page 5: ...NAVSHIPS 900 853 Front Matter Change No Dale Signature of Officer Making Correction c ...

Page 6: ...ed But Not Supplied Vacuum Tube Complement SECTION II Theory of Operation I Theory of Operation SECTION III Installation and Initial Adjustments 2 3 Unpacking Installation Initial Adjustments SECTION IV Operation 2 0 2 1 2 3 0 3 1 4 0 3 0 3 0 3 1 1 Operation 4 0 SECTION V Maintenance 5 0 5 11 5 12 1 Operators Maintenance 5 1 2 3 Preventive Maintenance Corrective Maintenance 5 1 5 1 SECTION VI Part...

Page 7: ...Cone Replacement 5 9 LIST OF DRAWINGS Figure Page 2 1 Functional Block Diagram 2 1 3 1 Main Terminal Board Diagram 3 0 5 4 Audio Frequency Curve 5 5 5 6 5 7 5 5 5 6 5 9 Cable Connection Diagram Schematic Circuit Diagram Amplifier Wiring Diagram 5 11 5 12 LIST OF TABLES Table No 6 1 Major Unit 6 2 6 3 Combined Parts and Spare Parts Lists by Symbol Designations List of Parts by Navy Numbers 6 4 Appl...

Page 8: ...r it is also guaranteed subject to the foregoing conditions against defects in design with the understanding that if ten percent or more of the total quantity comprising such item furnished under the contract but not less than two thereof is found to be defective as to design the entire item will be conclusively presumed to be of defective design and shall be subject to one hundred percent correct...

Page 9: ...s book shall be filled in at time of installation Operating personnel shall also mark the date placed in service on the date plate located below the model nameplate on the equip ment using suitable methods and care to avoid damaging the equipment All requests or requisitions for replacement material should include the following data 1 Name of part desired 2 Navy stock number or when ordering from ...

Page 10: ......

Page 11: ...NAVSHIPS 900 853 Fi lure I I 5 peaker Amp ifier Navy Type CMX 49545 1 0 ...

Page 12: ...rated g Total Weight Main unit crated 100 Ibs un crated 60 lbs Spare Parts crated 70 Ibs h Frequency Range 100 5000 cps i Rated Output 3 Watts j Voltage 1l5 V AC I00 o 50 60 cps 50 Watts single phase k Input Impedance 620 Ohms IO balance4 or unbalanced to ground Overall Dimension Volume Weight A Crated A Crated A Crated Equipment Designation B Uncrated B Uncrated B Uncrated 1 Speaker CMX 49545 A 2...

Page 13: ...garithmic taper which may be adjusted from the front of the panel to give the desired audio output The tuned filter type tone control circuit is inserted 2 0 between the voltage amplifier and the power amplifier and the tone may be regulated by means of a potentiom eter R 112 adjustable from the front of the panel to give the des_ired audio response The tone control circuit is composed of an induc...

Page 14: ... BY A OIROLE AND A DOTTED LINE SHOWING POINT IN OIROUIT WHERE THEY ARE OONNEOTED 2_ LETTERS AND NUMBERS OUTSIDE TUBE BLOOKS INDIOATE TUBE ELEMENT AND SOOKET PIN 3_ HEAVY LINES AND ARROW HEADS INDIOATE DIREOTION OF ENERGY FLOW_ G POWER AMPLIFIER V 102 P 5 6V6 GT IT POWER AMPLIFIER G V 103 P i eVe GTt 3 INVERSE FEEDBAOK 01 n ER 101 LS iOi SPEAKER AMPLIFIER CMX 49545 FUNCTIONAL BLOCK DIAGRAM r CD 0 0...

Page 15: ...ed paces offering some degree of protection from gun blast as this equipment is neither water proof sub mergence proof nor blast proof In order to provide for the entrance of the input and power cables bosses are furnished on each side and on top of the cabinet in which holes may be drilled to fit the cables Side or top entrance should be made ac cording to the convenience of installation After th...

Page 16: ...ype RHO or equivalent so that the input to any Speaker Amplifier will be within the range of 6 milliwatts 1 9 volts across 600 ohms to 2 watts 34 7 volts across 600 ohms for proper operation of the Speaker Amplifier The input selector on the outside of the front panel is adjusted to select a total of five inputs 1 less than five input circuits are to be used the switch stop must be adjusted so tha...

Page 17: ... III 3 2 To operate the Speaker Amplifier after complete installation has been made move the OFF ON switch figure 4 1 to the ON posItIon and set the channel selector switch to the desired station The volume con trol on the right side of the panel should then be set to the desired volume which increases with the scale Finally the tone control on the left of the OFF ON switch should be set to give t...

Page 18: ... Operation NAVSHIPS 900 853 Section 4 4 1 ...

Page 19: ...ty Use the back of the card to completely describe the cause u u H W H O of failure and attach an extra piece of paper if necessary The purpose of this report is to inform BU SHIPS of the cause and rate of failures The inrormation is used by the Bureau in the design of future equipment and in the maintenance of adequate supplies to keep the present equip ment going The cards you send in together w...

Page 20: ... checked on a standard tube checker after every 250 hours of operation or every three months whichever comes first Defective tubes shall be replaced immediately for most efficient operation See paragraph Ib of Section 5 The dry electrolytic capacitors C 101 and C 102 are used as cathode by pa s capacitors and under normal conditions of operation have sufficient safety factor to insure a life expec...

Page 21: ...Section 5 NAVSHIPS 900 853 Maintenance figure 5 1 Speaker Amplifier CMX 49545 Top Chassis View I 5 2 ...

Page 22: ...Maintenance II NAVSHIPS 900 853 RESISTOR BOARD SEE FIG 5 5 RESISTOR BOARD SEE FIG 5 5 Figure 5 2 Speaker Amplifier CMX 49545 Lower Chassis View Section 5 5 3 ...

Page 23: ...Section 5 RESISTOR BOARD SEE FIG 5 5 NAVSHIPS 900 853 Maintenance RESISTOR BOARD SEE FIG 5 5 Figure 5 3 Speaker Amplifier CMX 49545 Lower Chassis View 5 4 ...

Page 24: ...Maintenance NAVSHIPS 900 853 Section 5 figure 5 4 Audio frequency Curve 5 5 ...

Page 25: ...Section 5 NAVSHIPS 900 853 Maintenance Figure 5 5 Cable Connection Diagram 5 6 ...

Page 26: ...ERMINALS USING 1000 OHMS VOLT METER FILAMENT VOLTAGE MEASURED BETWEEN SOCKET TERMINALS USING 1000 OHMS VOLT RECTIFIER TYPE A C METER VOLTAGES MEASURED WITH 115V 60 CPS LINE VOL TAGE RESISTANCE MEASURED WITH EQUIPMENT OFF a EXTERNAL CABLES DISCONNECTED RESISTANCE VALUES DESIGNATED 6 DENOTE RESISTANCE TO GROUND OF INDICATED POINT VOLTAGE a RESISTANCE VALUES MEASURED WITH WESTON MODEL 772 ANALYZER 3 ...

Page 27: ...emains of the paper and cement from the housing after which remove the tape and blow the air gap with compressed air if available or wipe out with a piece of Scotch tape Apply evenly an ample supply of some good grade fast drying water proof cement to the hous ing rim and in the circular depression which seats the spider see figure 5 7 Put the new assembly lightly in place with the moving coil lea...

Page 28: ...S VOICE COIL FLEXIBLE LEADS SPIDER ___ CONE CONE AND VOICE COIL ASSEMBLY figure 5 7 Parts or Cone Replacement J I SHIM PLACE CONE ASSEMBLY GASKET Figure 5 8 Completed Cone Replacement fReady for Drying c 5 ii c z J g c l 0 ...

Page 29: ...CK VOLTAGES WITH EQUIPMENT ON t r PI l 1 AND 115 V 60 1 POWER CONNECTED 2 CHECK RESI TANCES WITH EQUIPMENT OFF AND ALL EXTERNAL CABLES DISCONNECTED 3 CHECK BETWEEN INDICATED TEST POINT AND GROUND OR BETWEEN THE TEST POINTS WHERE TWO ARE LISTED 4 MEASUREMENTS MADE WITH WESTON MODEL 772 ANALYZER USING 1000 OHMS PER VOLT SENSITIVITY ON ALL MEASUREMENTS 5 SET VOLUME AND TONE CONTROLS TO VOLTAGES ARE D...

Page 30: ...aker Amplifier CMX 49545 Contract NXsr 93879 AWS JAN Function 0 Magnavox Navy Type Drawing No Designation Cathode by pass first audio stage 483949 16B20GI Cathode by pass output stage 483949 Plate bloddng first audio stage CP26AIEF503K 16A269GI Screen by pass first audio stage 481002 5 16A252GI Coupling for inverse feedback CN42E203K 16A267Gl Coupling for inverse feedback CN42E203K Plate power fil...

Page 31: ...ut channel load resistor RC4lBF621j R I04 Same as R 101 Input channel load resistor RC41BF621j R 105 Same as R 101 Input channel load resistor RC4 lBF62 Ij R loG Potentiometer 25000 ohms 200 0 Volume control 634809 20 16C83GI taper 4 50 rotation R 107 Resistor fixed composition 270 ohms Cathode bias resistor RC21BF271K 16AllOG3 10 liz watt first audio stage R 108 Same as R 107 Cathode bias resisto...

Page 32: ...m 1 and 2 6 3 V output and plate and screen voltages term 3 and 4 5 V output term 5 and 6 580 V output term 7 and 9 CT high voltage sec term 8 Y IOI Tube amplifier Yoltage amplifier JAN 6V6GT G Y 102 Same as V lOl Power amplifier JAN 6V6GT G V 103 Same as Y lOl Power amplifier JAN 6V6GT G V 104 Tube rectifier Furnish DC plate volt JAN 5Y3GT G X WI Tube socket For voltage amplifier tube 49351 X 102...

Page 33: ... L 102 Audio DC resistance 370 ohms inductance 1 035 henries imped 1000 cps 6400 ohms L 101 Filter DC resistance 207 ohms impedance 2800 ohms 60 cps and 70 rna DC load T lOl Input primary DC resistance 860 ohms sec DC resistance 1030 ohms T 102 Interstage primary DC resistance 2435 ohms sec DC resistance 3140 ohms T 103 Output primary DC resistance 410 ohms sec DC resistance 0 170 ohms T 104 Power...

Page 34: ...UDSPEAKER Major Unit Class 49 LS lOl 8 Magneto dynamic RESISTORS AND POTENTIOMETERS Class 63 R 1l7 Resistor wire wound 220 ohms 10 2 watts R llS R 1l6 Resistor fixed composition 15000 ohms lO 1f2 watt R 107 R 108 Resistor fixed composition 270 ohms 100 v 112 watt R 109 Resistor fixed composition 0 47 megohms lO Y2 watt R 113 R 114 Resistor fixed composition 0 1 megohms 100 0 1 watt R III Resistor ...

Page 35: ...e of the resistance of resistor BAND B indicates second significant figure of the resistance of resistor BAND C indicates the decimal multiplier BAND uD indicates the tolerance limits about the normal resistance value Tolerance 5 10 20 In this equipment the nominal resistance values of the fixed composition resistors are indicated by bands of color around the body of the resistors in accordance wi...

Page 36: ...in this equipment is indicated by a row of three markers colored to express the capacitance of the capacitor The first significant figure is designated by the first color reading in the direction of the arrow the second significant figure by the second color and the multiplier by the third color The characteristics of capacitors with voltage ratings 5 1000 10 2000 20o l 500 other than 500 volts ar...

Page 37: ... Dial Light Corp of America New York N Y 9 CER Erie Resistor Co Erie Pa 10 CBV John E Fast Co Chicago Ill 11 CG General Electric Co Schenectady N Y 12 CIR International Resistance Co Philadelphia Pa 13 CMX The Magnavox Co Fort Wayne Ind 14 CMA P R Mallory Co Indianapolis Ind 15 CMR Micamold Radio Corp Brooklyn N Y 16 CRP Raytheon Mfg Co Waltham Mass 17 CRC RCA MIg Co Harrison N J 18 J 1 Ryerson So...

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