Ampex 200A Instruction Book
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Ampex 200A, SCHEM. REF, NO. C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 c312 C313 C314 C315 C316 C317 C318 C319 C320 J301p ;;:;; L301 L302 L303 L304 R301 R302 R303 PARTS LIST-FECORD AMP- I DESCRIPTION DRAWING OR SPEC. NO. 50 mmf, 500 v. Mica Condenser, 5% tolerance ................................................................ .01 mf, 200 v. Tubular Condenser, 5% tolerance ............................................................ .1 mf, 600 v. Tubular Condenser ...................................................................................... G. E. 1 mf, 600 v. Pyr
Ampex 200A, at @ volts through R203. The time relay K205 is picked up, the start light is ener- gized, and the stop light disconnected. Pressing the record button picks up the record relay K204, which locks itself in, energizes the record light, connects the record head to the record amplifier output, and supplies plate voltage to the oscillator, bias and erase tubes. All motor connections remain the same. Operating the Rewind button picks up relay K202,
Ampex 200A, RECORDING TIME: 35 minutes per reel. TAPE MOUNTING: On 4-inch diameter hub with single 1Cinch diameter flange at- tached for safe and convenient handling of valuable program material. Design of driving spindles allows reels to be placed on or removed from recorder quickly and conveni- ently. Hub design permits rapid tape threading. TAPE Sufficient reserve capacity and flexibility have been designed into the amplifiers so that any of the leading makes of tape may be accommodated. However, as shipped the machine has b
Ampex 200A, RELAY CHASSIS : ward and Rewind, respectively. voltage of 65-70 volts (60-65 volts with Bodine motors). voltage of 60-65 volts (55-60 volts with Bodine motors). Forward respectively. 12. 13. 14. R201; Adjusts holdback voltage on rewind or takeup motor during Fast For- R202; Adjusts voltage on takeup motor during normal playing. Set for motor R203; Adjusts voltage on rewind motor during normal playing. Set for motor R205 ; Adjusts voltage on rewind and takeup motors during rewind and Fast Set for 30 volts. 15. Set for 90 volts (85 volts o
Ampex 200A, PARTS LIST.- ING GUTTER . MFGR'S . CAT . OR TYPE NO . SCHEM . REF . NO . F501 JlOlS J206S J303S J402S J50lP JWlS J502P J502S J503p J503S J504S J504P J505S TS501 TS502 R5Ol AGC-8 ' DP-D-20-33S DP-D-40-33S DP-B-12-33S DRAWING OR SPEC . NO . DESCRIPTION Littlefuse 8 ampere fuse. 250 v ......................................................................................... Cannon connector .............................................................................................................. Cannon connector ..............
Ampex 200A, INTRODUCTION The AMPEX Magnetic Tape Recorder has been so designed as to make the highest quality of recordings possible to achieve. Using the best possible input and monitoring equipment, recordings cannot be distinguished from original program material when directly compared. All components have been conservatively designed, using the best possible materials, in order to insure maximum reliability of service. PERFORMANCE CHARACTERISTICS The specifications of the AMPEX Magnetic Tape Recorder are as follows: FREQUENCY RESPONSE: 30 to 15,000 cy
PARTS LIST - POWER SUPPLY CHASSIS SCHEM. REF. NO. ClOl c102 FlOl F102 JlOlP LlOl L102 L103 RlOl R102 R103 R104 TI01 Ti02 VlOl v102 V103 V104 DRAWING OR SPEC. NO. DESCRIPTION Solar dual 40 mf., 450 V. Electrolytic Condenser ................................. &-__ ....................... Solar dual 40 mf., 150 V. .......................................
Ampex 200A, Contents ... Introduction .... Performance Characteristics Tape ...... Drive System .... Head Housing ... Electronic System ... Controls ..... Installation and Operation Adjustments .... Maintenance .... Demagnetizing Heads . . PAGE ........ 3 ........ 3 ........ 5 ........ 5 ........ 8 ........ 8 11 12 ........ 14 ........ 19 ........ 20
Ampex 200A, PARTS LIST-RECORD AMPLIFIER, continued 1 SCHEM. - REF. NO. R304 R305 R306 R307 R308 R309 R310 R311 R312 R313 R314 R315 R316 R317 €318 R319 R320 - R321 R322 R323 R324 R325 R326 T301 T302 T303 v30l V302 V303 V304 v305 ORAWjNG OR SPEC. NO. DESCRIPTION 22,000 ohm, 1 watt, Composition Resistor, Allen-Bradley ................................................ .47 megohm, 1 watt, Composition Resistor, Allen-Bradley .............................................. 220 ohm
Ampex 200A, takeup tension arm moved into position, the machine is ready to start. When recording, it is recommended that plenty of leader be used to facilitate cueing and allow for breaking off of the ends. Due to'the fact that some lots of tape have been cut crooked and do not wind prop- erly, it is recommended that when winding at higli speed (Rewind or Fast Forward), a cover plate be used on the reel taking up the tape. For this purpose, a flat aluminum disc is provided. This is placed over the empty reel after threading, and is held in place by
Ampex 200A, shipment or changing conditions indicate that changes are necessary. Adjustments should be made only by competent technicians, and only with the proper tools and instruments to insure that optimum conditions can be obtained. ELECTRICAL : RECORD CHASSIS : 1. R321, Record gain. Set to give optimum performance at line level of plus 4 VU. TO set record level for any other value, record desired level at approximately 1,000 cycles. Adjust record gain until playback is plus 4 dbm. 2. R320, Low Frequency Equalization. Set for flat o
Ampex 200A, I PARTS LIST-PLAYBACK AMPLIFIER continued SCHEM. REF. NO. R405 R406 R407 R408 R409 K410 R411 R412 R413 R414 R415 R416 R417 R418 K419 R420 R42 1 R422 R423 R424 R42 5 R426 R427 DRAWING OR SPEC. NO. MFGR'S. CAT. OR TYPE NO. DESCRIPTION Same as R401 ........................................... ____: ...................................................................... .47 megohm, 1 watt, composition resistor, Allen-Bradley, same as R305 ...................................................................................... 2200 ohm, 1 watt, cornposition resistor, Allen-Bradley, 5 "/o tolerance ........
Ampex 200A, PARTS LIST-TOP PLATE ASSEMBLY SCHEM. REF. NO. A1 A2 A3 A4 AS B1 132 B3 c1 c2 c3 DRAWINO OR SPEC. NO. A-222 A-232 A-136 A-136 A-182 DESCRIPTION .. Mazda 28 v. miniature lamp, bayonet base ........................................................................ Same as A I ........................................................................................................................ Same as A 1 ........................................................................................................................ Same as A 1 .......
Ampex 200A, arm consisting of C419 and R432 is necessary to flatten the response. When different head assemblies are used, it may be necessary to slightly alter the value of C409 and/or C419 to keep the response within C414 and C415, in conjunction with L401 and L402, provide a 60 kc. wavetrap to remove the bias and erase frequency from the playback output. C414 and C415 are air trimmers with screwdriver adjustment. The first two stages of the amplifier are resiliently mounted. The first stage tube, V401, is selected for low noise level and low microphonics. Of the five 12SJ7.s in the amplifier, at least two or thre
Ampex 200A, HEAD HOUSING Figure 3 illustrates the head housing with the gate retaining springs removcd so that the gate is opened to expose the heads. The playback head, which appears on the ' extreme left, is contained in two mu-metal shield cans with a copper shield can in be- ~ tween. Matching coverplates on the gate, consisting of three mu-metal plates insulated 1 with non-magnetic spacers, cover the front of the playback shield cans when the gate is 1 closed to provide completely enclosed shielding. The record and playback heads are 1 each contained in a coppe
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