Ferguson-FerrographY722-tape-维修说明书手册含电器原理图

Y722Y722HY722LY724Y724LFERROGRAPHSERIES SEVENSECTION 1Models Y722 Y724SPECIFICATIONThe General Specification applies to the models Y722 and Y724.except asdetailed below.Track WidthHalf Track (Y722)0-090 in.(2-3 mm.);Quarter Track (Y724)0-043 in.(1-1 mm.)Operating Tape SpeedsThree (3):7,34.1in/s0c.(19,9-5,4-75cm/sec)Suffix H 15,74.3 in/sec.(38,19,9-5 cm/sec.)Suffix L 3.1 in/sec.(95,4-75,2-875 cm/sec.)Tape Speed AccuracyBetter than±1%(at specified mains frequency）Frequency ResponseRecord-Replay,using LP Ferrotope B or Scotch 203:15 in/sec.(38 cm/sec.):40-20,000Hz+2dB7 in/sec.(19cm/sec.):40-17.000Hz±2dB32 in/sec.(95 cm/sec.):40-14.000Hz±3dB1 in/sec.(4-75 cm/sec.):50-7,000Hz 3dBin/sec.(2.875 cm/sec.):60-3.000Hz±3dBReplay CharacteristicD.I.N.1.E.C.N.A.B(later(117V models)models)15 in/sec.(38cm/sec.):35μsec.35μsec50u sec.7生in/sec.(19cm/sec.)50/3180μsec70μsec50/3180μsec.3 in/sec.(95 cm/sec.)90/31804s0c.90μsec.90/3180μsec.1 in/sec.(4.75 cm/sec.):120/1590u58c.120u sec.120/3180us0cSignal to Noise Ratio (at 7 in/sec.-ref.2%distortion)Unweighted,including hum;better than 55dBWeighted (C.C.I.F.)track;better than 60dB+track;better than 58dBInput (for peak level recording of 32mMx/mm.)Microphone:300gV-15mV at 10KRecommended Source:250-2,000 (standard jack)Line:150mV-5V at 10K Q,*isolatedRecommended Source:600(3 contact gauge B jack)Output (from peak level recording of 32mMx/mm.)600 ohm:1V into 600:*isolated (3 contact,gauge B jack)Low Level:300mV into 10K:(standard jack)Loudspeaker:10W into 8-16;(standard jack)Phones:suitable for headphones 1000 1(3 contact,gauge B jack)*Can be made balanced by connecting transformer centre-tap to the earth pin (green lead).tSerial number 79458 onwards