Ampex-4-Schematic 电路图 维修手册.pdf

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1、 SCHEMATIC DIAGRAM OF PRE-AMPLIFIERS !Z!ll; -66 OOJR!IISE 9CJFG) -.-. ot.i-w, .u.u:.:.:.sq,-) . _. lflGlt.OOD lM.llilOUl4tl . -D-.C_., :i:o:=.-= laCl SPECIFICATIONS TAPE SPEl!DS: 7 and 3 inches per second. TAPE REELS: All sizes up to a maximum of 7. TAPE THICKNESSES: Handles standard, long play, and

2、 extra- long-play tapes. MODEL 938: Playback output is approximately 0.75 volts lD18 from tapes recorded at maximum normal recording level. Cathode follower output for maximum flexibility in connecting to other components. Playback response essentially flat throughout the audio range with extremely low background noise level, with dy- namic range as follows: . 7 ips 2 db from 50 to 15,000 cps. 3 ips 2 db from 50 to 8,000 cps. MODEL 934: With preamplifiers equivalent to those used in the 936 (see diagram above), the Model 934 will provide equal per- formance with the 936. t.l II