Scott-LK-48-Schematic 电路图 维修手册.pdf

《Scott-LK-48-Schematic 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Scott-LK-48-Schematic 电路图 维修手册.pdf（3页珍藏版）》请在收音机爱好者资料库上搜索。

1、SPECIFICATIONS H. H. SCOTT, INC. 111 Powder Mill Road Maynard, Mass. SERVICE BULLETIN For MODELLK-48 STEREO AMPLIFIER Maximum power output each channel at 1000 cycles: Music waveforms . . Steady state . . Maximum total harmonie distortion at rated output . Frequency response for 20 watts steady stat

2、e at lss than 1.5% total distortion . , . Maximum usable power output at 20 cycles: Music waveorms . Steady state . Power bandwidth at rated distortion (IHFK method) . Intermodulation distortion . Signal for rated output NAB (NARTB) tape at 1 kc . Signal for rated output RIAA equalization at 1 kc .

3、Signal for rated output RIAA equalization at 1 kc . Signal for rated output Tuner, Extra, and Playback . Hum and noise high level inputs . . Hum and noise - low level inputs . Scratch filter . Treble boost and Treble eut (at 10 kc.) . . Bass boost and eut (at 50 cycles) . 24 watts 20 watts 0.8% 20 t

4、o 20,000 cycles* 28 watts 24 watts * below 19 cycles to above 20,000 cycles (limita of test equip) below 0.5% 3.0 mv. 3.0 mv. (MAG LOW) 9.0 mv. (MAG HIGH) 0.50 volts 80 db. below rated power 10 microvolts equiva lent Above 5 kc. 15 db. + 2 db. 15 db. 2 db. (These characteristics are measured at a li

5、ne voltage of 117 volts rms and line frequency of 60 cycles per second. No significant changes of characteristics should be experienced for normal variations of line voltages or a line frequency of 50 cycles per second). Input impedance low level inputs (MAG LCM). 47 k. ohms Input impedance - low le

6、vel inputs (MAG HIGH). 150 k. ohms Input impedance - high level inputs. 500 k. ohms Minimum recomnended load resistance on tape outputs. 200 k. ohms Maximum recommended cable capacitance on tape outputs. 200 IIDllfds. Range of line voltage and frequency . 1 105-125 volts, 50-60 cycles Power consumpt

7、ion - 117 volts at 60 cps (A.C. only) 170 watts *All H. H. Scott amplifiera and preamplifiers incorporate a low frequency rolloff which becomes fully operative below 20 cycles. This is designed to pre .ent overload of the output stage and the loudspeaker due to subsonic rudle frequencies and record eccentricity. Ibis means that the full power of the amplifier can be concentrated into the audible range. p-LK-48-2(Continued on reverse) RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库