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Страница 1: ...www SteamPoweredRadio Com MS 25B 25 WATT AMPLIFIER McMartin Industries Inc 4500 South 76th Street Omaha Nebraska 68127 Phone 402 331 2000 ...
Страница 2: ...o Com I I I I I I I I I I I I I I I I I 1 ii MCMartin c arti MS 25B 25 WATT AMPLIFIER INSTRUCTION MANUAL I SPECIFICATIONS 11 GENERAL DESCRIPTION Ill INSTALLATION IV PARTS LIST WARRANTY V SCHEMATIC DIAGRAMS page 1 1 2 3 4 5 ...
Страница 3: ...ules such as me or two microphone pre amplifiers with balanced input telephone page adaptor feedback type individual bass and treble controls and en electronic page mute adaptor for controlling all input muting See catalog sheets for full MSA Module items For convenience the most commonly used modules MSA 1 2 3 are described here TONE CONTROLS MSA 2 A separate plug in circuit card MSA 2 is availab...
Страница 4: ...uts should be connected to the appropriate screw terminals on the rear of the unit The ground connections are for shield grounds and for the page mute ground returns A three onductor microphone cord with shield may be used with one lead for the page mute Iine The page mute circuit may then be activated by a remote microphone switch NOTE Always disable the microphone audio Iine shunt switch when us...
Страница 5: ...OL Q 1 2 Q 3 R 2 11 P N 201049 201022 400042 PARTS LIST MSA 3 PAGE MUTE MODULE SYMBOL Q 1 2 3 4 0 1 2 3 0 4 5 R 3 PIN 201049 220003 220006 400042 DESCRIPTION Transistor SE 4010 Transistor 2N 3569 Transistor MJE 2901 Transistor MJE 2801 Diode Rectifier 808 800 PIV at 750 MA Diode Zener 36 Volts Control 50 K Linear Resistor 3 3 ohm watt Control 50 K Audio Capacitor 1000 MFO at 50 Volts DC Capacitor ...
Страница 6: ...t ports for any properly maintained equipment or ports that are de fective as to design materials or workmanship and that are re turned in accordance with McMartin s instructions to the Buyer At McMartin s sole discretion the Buyer may be requested to re turn the defective port of equipment to McMartin FOB Omaha Nebraska Ports or equipment may be returned only with McMar tin s prior authorization ...
Страница 7: ...BOL 0 1 2 0 3 R 2 11 P N 201049 201022 400042 PARTS LIST MSA 3 PAGE MUTE MODULE SYMBOL 0 1 2 3 4 D 1 2 3 0 4 5 R 3 P N 201049 220003 220006 400042 DESCRIPTION Transistor SE 4010 Transistor 2N 3569 Transistor MJE 2901 Transistor MJE 2801 Diode Rectifier 808 800 PIV at 750 MA Diode Zener 36 Volts Control 50 K Linear Resistor 3 3 ohm watt Control 50 K Audio Capacitor 1000 MFD at 50 Volts DC Capacitor...
Страница 8: ...nt ports for any properly maintained equipment or ports that ore de fective as to design materials or workmanship and that are re turned in accordance with McMartin s instructions to the Buyer At McMartin s sole discretion the Buyer may be requested to re turn the defective port of equipment to McMartin FOB Omaha Nebraska Ports or equipment may be returned only with McMar tin s prior authorization...
Страница 9: ... I I I I I I I I I I I I I I I I I I I MCMartin 4 75 MSA 1 MSA 2 MSA 3 MS 25B V SCHEMATIC DIAGRAMS MIC PRE AMP MODULE TONE CONTROL MODULE PAGE MUTE MODULE MASTER SCHEMATIC P N 000400 PIN 000401 P N 000402 E 2706 page 6 7 8 9 5 ...
Страница 10: ...l t 64V 4 1 lt N 11 VV 50 n 4 111 I Rl 2 f ffitASS R1i l K n MIC I o c C7 _hooK CUT 270 n COMMON 3 470pfT C 6 1 2 6 I I I I v 1 64V GROUND 7 OUT PUT R5 15K 0 0 3 z en z m 8 NOTES V Jc o I ELECTROLYTICS HAVE POLARITY SHOWN o 0 2 UNLESS OTHERWISE SPECIFIED g RES I ST ORS 1fi w 10 r CAPACITORS IN MFO Li en m J ...
Страница 11: ... 05 R7 4 7K C3 05 C6 25 64V J_C4 1 32 64V R4 22 K T ON E AMP C5 R5 180 pf 4 7 K r 11 1 11 __L1 rr Q2 SE 4002 _flO Rl4 3 9K _ _1_c 13 Rl3 1_c12 Rl5 CII 2 5 64V P 11 50 K 50 2 2 K _ 50 4 70A 8 6 TREBLE 6 4V 6 4V z GROUND fr NOT ES I 0 A O D z I ELECTROLYTIC HAVE POLARITY SHOWN o m 2 UNLESS OTHERWISE SPECIFIED LJ g RESI STvRS tftw 10 CAPACITORS IN MFD fnn7 ffi ...
Страница 12: ...UTE LEVEL R4 IOK R5 4 7K C2 50 T 6 4V R7 10 K R6 4 7K C3 _Jj 50 6 4 RS 150K SE4002 04 I t D4 7 1 77 t 4 NOTES PIN TITLE 1 ELECTROLYTICS HAVE POLARITY SHOWN i 3 3 2 UNLESS OTHERWISE SPECIFIED _ t z RESISTORS 1 lw 10 Jc g CAPACITORS IN MFD 1 L Llk _ lSU ju a ___ la M 1 0 Li g 0 rm LI mm ...
Страница 13: ...P C4 I I 50n _ 47 K 6 tV I I V v t 11r R6 R5 5 I RK 2 5 COM R7 I5K I I5K I 1 0 C7 Rl2 RII R9 R8 _ _ _ A _O VV 0 7 I 3 410 1 IOOK SASS 270n IOK 4 7K 50K l I I c IM1c2 I I t6 cs I T5o _ s I I 12sv 64V 6 I _____________ _ _ _ __ GNO I L f J NOTES UNLESS OTHERWISE SPECIFIED I C J FRONT PANEL FUNCTIONS 2 COMPONENT VALUES SHOWN IN PARENTHESIS USED IN MS 108 EXAMPLE IMJE 2051 3 Tl MS 108 900007 MS 258 90...
Страница 14: ...www SteamPoweredRadio Com ...
