Stromberg_carlson_aph1100 电路图 维修原理图.pdf

《Stromberg_carlson_aph1100 电路图 维修原理图.pdf》由会员分享，可在线阅读，更多相关《Stromberg_carlson_aph1100 电路图 维修原理图.pdf（4页珍藏版）》请在收音机爱好者资料库上搜索。

1、STROMBERG-CARLSON niodel APH-1100 100 watt audio power amplifier SPECIFICATIONS OUTPUT POWER -100 watts with less than 5% harmonic distortion from 50-15, 000 cps, 80 watts with less than 2% harmonic distortion from 40-20, 000 cps. FREQUENCY RESPONSE -20-30, 000 cps ldb, high pass filter out 10-70, 0

2、00 cps 4db, high pass filter out IM DISTORTION -3. 5% maximL1m with 4:1 ratio of 60 cps and 7KC INPUT SENSITIVITY -1. volts into 250, 000 ohms un- balanced; . 5 volts into 10, 000 ohms balanced line HUM AND NOISE - SOdb below 100 watts REGULATION INPUTS -Full load to no load less than 2db - One inpu

3、t; amplifier may be operated with a 250K ohm unbalanced input or, when an input transformer is used with a lOK ohm balanced input GIIIIIIIID GENERAL CJVNAMICS OUTPUT CONTROLS -70V and 25V center tapped constant voltage line and 115V aulio output receptacle. -Input level control, DC balance and Bias

4、Adjustment Controls POWER SOURCE -105-125 volts AC, 50-60 cps POWER CONSUMPTION- 175 watts TUBE AND DIODE COMPLEMENT 1 - 7199 2 -6550 2-1Nl764 1 -1Nl873 Voltage amplifier and phase splitter Power Outputs Rectifiers (full wave) Bias Supply Rectifier ACCESSORIES Standby Relay -172000-015, Model No. RS

5、-1012 Input Transformer -172000-065, Model No. TB-1011 Hinge Kit -SC-1102 Amplifier Panel -SCP-1101 ELECTRONICS ROCHESTER 146011-204 . = Ol e+- . . e+- . 0 = 收音机爱好者资料库 Ra d i o Fa n s .CN GENERAL DESCRIPTION The APH-1100 is a high quality, 100 watt amplifier de- signed for use in school systems and

6、in commercial rack and shelf mounted applications. Rack mounting of this unit may be facilitated by the use of an accessory hinge kit (SC-1102) containing a hinged bracket for use in pro- viding the amplifier with a swing out for service feature. An amplifier panel with pilot light opening (SCP-1101

7、) is also available for rack mounting. A standby relay, Model No. RS-1012 (Part no. 172000- 015), can be accomodated by the relay socket provided on the amplifier chassis. Twenty four volts DC (24 VDC) applied to terminals Kl and K2 will energize the relay and ground the cathodes of the output tubes

8、, placing the amplifier in its ready mode of operation. The APH-1100 has a high impedance (250K ohm) un- balanced input with provision for the installation of an input matching transformer, Model No. TB-1011 (part no. 172000-065). This accessory will provide isolation from the input source and permi

9、t balanced operation from a source of lOK ohms or less. SERVICE INFORMATION Power Transformer The power transformer of the APH-1100 features a tapped primary winding for either 117V or 125V operation. Connections for the two voltage ranges are as follows- White lead common, Black and White lead 117V

10、 tap, Black lead 125V tap. All amplifiers shipped from the factory will be connected for 125 volt operation. Should the line voltage in your locality be consistently below 125 volts reconnect to the 117V tap. Input Transformers Inputs with an impedance of lOK ohms may be impedance matched to the amp

11、lifier by the addition ofan input trans- former 172000-065 which plugs into the socket provided on the amplifier chassis. NOTE: Before installing this transformer remove the plug-in jumper between pins 3 and 4 of the socket. If an unbalanced high impedance input is to be connected to the amplifier t

12、he transformer must be removed and the jumper reinserted. As many as four (4) APH-1100 amplifiers may be oper- ated in parallel from either the Stromberg-Carlson SCP- 1003 or SCP-1005 preamplifier. Standby Relays A Standby Relay, 172000-015, available as an accessory, may be used as an output tube c

13、ut-off to place the ampli- fier in its standby mode. Before installing the Standby Relay the plug-in jumper between pins 5 and 6 of the relay socket (on amplifier) must be removed. If, at any time, the Standby Relay is removed this jumper must be reinserted. Once the relay is installed twenty four (

14、24) volts DC ap- plied to terminals Kl and K2 on the amplifier terminal strip will energize the relay and apply a ground to the cathodes of the output tubes, placing the amplifier in its ready mode. CONTROLS AND ADJUSTMENTS Power Output Stage Bias Adjustment -DC Balance Controls The Bias Adjustment

15、Control provides a sufficient degree of adjustment to allow the employment of unmatched output tubes in the Power Output stage. The use of matched pairs of output tubes however, will aid in bias adjustment and provide optimum conditions for high fi- delity output and peak power. Occasionally, it wil

16、l be found that some tubes cannot be balanced regardless of the Bias Adjustment Control setting; when this occurs replace one or b6th of the tubes in a push pull pair until balance is obtained. The DC Balance Control is provided to allow readjustment of the amount of Plate Current in the output stag

17、es of the amplifier. The Bias Adjustment and DC Balance Controls have been adjusted at the factory. Should further adjustment be- come necessary they should be adjusted as indicated be- low: 1. Open the shorting links on the test point termi- nals. 2. 3. 4. 5. Prior to switching the amplifier ON, tu

18、rn the Bias Control to its full counter clockwise position. Switch ON the power and adjust line voltage to 125 volts. NOTE: The source voltage must be exactly 125 V. A. C. at 60 cps and provided by a vari- able voltage AC source. With no signal applied to the amplifier input connct a voltmeter (use

19、a meter with a DC scale capable of accurately indicating . 55 volts DC) between test points A and B and B and C. Adjust the DC balance until equal voltages are measured between each test point (A to B and B to C). If a zero center meter is available connect it between test points A and C and adjust

20、the DC Balance Con- trol for a zero reading on the meter. Reconnect meter to test point A or C and chassis ground. Adjust bias control for 55 volts DC. 收音机爱好者资料库 Ra d i o Fa n s .CN 6. If necessary readjust the DC Balance Con- trol until 55 volts DC is measured from both test points A and C to chass

21、is. Input level control R3 is a 500K ohm potentiometer which regulates the amplifier output by attenuating the input signal. Rated Load Impedance for 100 Watts Output Rated Load -ohms 50 6.25 LOAD IMPEDANCE Rated Output -voltage 70V 25V The use of line matching transformers is not required when the

22、amplifier output feeds a single speaker or is divided equally among a few speakers spaced along a relatively short line. The accompanying chart, based on a ldb loss, indicates the maximum length of wire to be used with a specific wire size and impedance. When two or more separate speaker lines are b

23、rought to an ampli- fier choose the minimum wire size for each line sepa- rately, using the impedance which terminates that line. OUTPUT TERMINALS A O.:i?- GRD . 70V4+t- 2sv.,. 1111!1 CT-: 25V . 70V. Kl , . K2 i. . 0 /. p ;_:lff jl sw1tcv- FUSE 115V AUDIO OUT PILOT LAMP Wire Line Impedance in Ohms G

24、auge 4 8 16 45 22 20 40 80 220 20 30 65 103 350 19 40 80 160 425 18 50 100 200 550 16 80 160 320 900 Wire Gauge 78 156 312 625 22 400 800 1600 3200 20 500 1000 2000 4000 19 650 1300 2600 5200 18 800 1600 3200 6400 16 1200 2400 4800 - Should it prove necessary to provide an uneven distri- bution of a

25、udio power to a number of speakers, the consta_nt voltage line taps (70 and 25 volts) of the ampli- fier are to be used. By connecting line matching trans- formers to each speaker it is possible to provide the desired power to each speaker position. The total power drawn, however, is not to exceed t

26、he rated power output of the power amplifier. INPUT TRANS.L VEL CONTROL TEST POINTS A 7199 收音机爱好者资料库 Ra d i o Fa n s .CN REPLACEMENT PARTS R3 R12, R25 fl21 C3 C4 C5 ClO Cll C12 CRl, CR2 SCHEMATIC CPS Resistors Control, Vol. 500K Control, Dual Bias, 5K Resistor, 10 ohm, 15W Capacitors 50uf/3V Elec.,

27、4uf/150V Elec., 120uf/350/80uf/200/ 20uf/350V Elec., 120uf/350V Elec., 80uf/200V Elec., 50uf/50V /50uf/50V Diodes Rectifier (Plate Supply) _47K T2 PLUG IN TRANSFORMER ( OPTJONAL) R2 470K c,o 120/350 CSA ca 120/350 c 80/200 CSB t:. 80/200 R2 2 47 II GE 1847 R23 47 CR3, CR4 145000-136 CR5 145000-137 5

28、54567-100 Tl T2 553088-500 111000-050 111000-111 111000-114 111000-115 111000-118 S2 Sl 162000-065 GENERAL DYNAMICS I ELECTRONICS ROCHESTER STROMBERG -CARLSON MODEL NO.APH-1100 AMPLIFIER VIB B4V 1/2 7199 91V 41V 4/150 C6 47 R6 c, R4 10% 50/3 470 IMEG RB 5% 47K 300V R5. -C5CO 470 20/350 Rectifier (Sc

29、reen Supply) Rectifier (Bias Supply) Miscellaneous Transformer, Output Transformer, Power Fuse Holder AC Cord Jumper, Plug-in Foot, Chassis Socket, Pilot Lamp Socket, Octal GP Socket, Octal LL Switch DPDT Switch AC . Lens, Pilot Socket, 9 Pin Rl5 635V * 6.BK ,.325V * 2-WHEN BALANCED 10K OHM INPUT IS

30、 OESlEO REMOVE JUMPER FROM: IN.PUT iRANS SOCKET AND lSERT !R:ANS .( G. D.#1610_00 -065 J 3-.ALL; CPl;IClfORS:-rN, MFO:uNL(ss OTHERwfsf SPECfF.I_E. 20_%; _ - . - : ,-, I I I I 4-ALL REs1si:O,R_s _tNOtiMS, 112 w 10_% tiNLEss OTHERWISE .SPECIFIEo_. .-. I I 162000-063 162000-052 161000-188 161000-240 55

31、9996-102 117000-026 120000-062 131000-001 152000-072 15201_4-000 152668-000 158000-058 158000-183 559996:-071 559999-028 5-VOLTAGES ARE20%AND Musr BE MEASURED IAi:sv!R SJN.AL. * INDICATES. I : L _ _J PLUG IN STANDBY RELAY ( OPTIONAL ) PLl.jG JN JUMPER -SEE NOTE I I STANDBY RELAY I CR5 R25 R2l -lOV 5

32、K 3.9K Cl2A R26 50/50 + 12K Cl28 + 50/50 D 5-bfis;E ltNK:IANOUJN . as tigT;L -r;os AND B ANO C THEN REPLACE LINKS. 7 -TO OBTAIN 115 VOLT OUTPUT PLACE JUMPER FROM GRO TO THE ADJACENT 70 V TERM ON OUTPUT TERMINAL BOARD. 8 -SEE INSTRUCTION MANUAL FOR ADDITIONAL INFORMATION 9 -c:J INDICATES EQUIPMENT MARKING I-WHEN REMOTE OPERATION IS DESIRED, REMOVE JUMPER FROM STANDBY RELAY SOCKET ANO INSERT RELAY G.0.#172000-015). PRINTED IN THE u.S.A.