Western Electric 22E, Instruction Bulletin

Page 1: ...Wesrern Electric 22E SPEECH INPUT EQUIPMENT IN S T RUCT I O N BULLET I N N O 1175 I S S UE N O 1...

Page 2: ...siern Electric 22E SPEECH INPUT EQUIPMENT Research and design by Bell Telephone Laboratories INSTRUCTION BULLETIN NO 1175 ISSUE NO I...

Page 3: ...Equipment Furnished a AC Operation b Battery Operation c Both AC and Battery Operation 2 Accessories Required a Cables and Plugs b Batteries c Monitoring d Microphones and Microphone Accessories 3 As...

Page 4: ...INDEX Cont d e Ground f Battery Cable g AC Connection h Power Switches i Plate Current Check 5 Operation a Gain Settings b Output Level c Precautions IV MAINTENANCE 6 6 7 7 7 7 7 7 7 7...

Page 5: ...Case with Cover 0 Ballery compartment with cord nd plug E AC Power Unit with cord nd plug F 639 type Microphone G KS t2COO Transmiller Cover H 24A Tronsmiller Mounting I I IA Trans mitter Allochment J...

Page 6: ...lines 65 db for Battery Operation Both at 70 db net gain and referred to output 62 db for AC Operation signal of 18 dbm Approximately 0 2 J o at 8 dbm 1 5 at 18 dbm See curve Figure 2 Four parallel mi...

Page 7: ...sa as may be required Receptacles and parallel mixing potentiom eters are provided for four microphones A master gain control is incorporated in the 3 stage amplifier Pads for either 150 or 600 ohm ou...

Page 8: ...rmally used for most program lines but the 150 ohm output is frequently used where the mismatch will provide a beneficial equalizing effect tending to compensate for the frequency transmission charact...

Page 9: ...ier A 47 Type Plug and a cord such as the 630 Type are recommended for making con nections between the 22E Amplifier and the monitoring amplifier ES 610199 Power Unit For a c operation the ES 610199 P...

Page 10: ...rage battery operation the required batteries are 4 Eveready No 762S or Burgess No 5308 for plate 1 Exide No 3 AC 7 1 storage battery per DA 26588 For filaments For dry cell battery operation the requ...

Page 11: ...wer Unit or both The B 147071 Set of Accessories for bat tery operation contains all the accessories excepting batteries listed above that are 6 necessary to modify the carrying case Full instructions...

Page 12: ...ould be permit ted however to allow for variations in sound levels of the program Output Level Normally an output level of 8 vu is ade quate In some cases jt may be necessary to transmit programs at a...

Page 13: ...as This enamel may be obtained from the nearest distributor of Western Electric audio facili ties It is supplied with an aluminum powder 8 that is not required for this application Should the 22E Spee...

Page 14: ...es one round and one hexagonal mounting nuts P R Mallory Co 1321 Two Gang Switch Two Circuits 11 Points each Circuit with Shaft IA lg 2 Plain Hex Nuts and 1 Lockwasher Yaxley Manufacturing Co Switch S...

Page 15: ...rying Case per ESR 610264 2 Following Items are Specific to the type of Power Supply For AC Supply Mallory Capacitor 10 10 mf 450 V Type FPO 231 1 dia x 2 lg can Furnish with metal washer A 93403 Mall...

Page 16: ..._ 2 3 4 5 67891 20 100 fRlQU NC IN CYCLES PU SlCO D Fig 1 Frequency Response Curve NOTE 7 500 C l S 2 NO H uM ONLY LINE VOlTAGf 120V 60 CYCU A C 2 OUTPUT LEVEL 18 DBM I I I I I I III OUTPUT LEVEL e DB...

Page 17: ...F C5 0 4MF R2 62QW R3 24QOW C4 0 4MF C 7 0 03MF Rl3 0 24MEG cs 50MF Rl2 s I 620W C6 1 I R2S I I 2 MF r 51ooow DI 5 4 3 I I 2 I T2 17SB I RD RD WH 3 Rl4 Rl5 3300W 2400 I I 0 1 __ e 14 QOFF O OFIL I I 0...

Page 18: ...l 5 CNO OR J Cl I I I I I I 0 c t _ _ I OA L T L d ll l T IT I IleL AO Ct I C7 i j I c wH I I WH rl u I l 1 f 1 l I I I 1 9 i I C2 k t N l I T 0 03 t O 4 I T2 ____ _ l l L 1 ___ c I 0 c r 1 I 11 V I I...

Page 19: ...Tl JI LI L2 llOV A C CORD ANO PLUG TO AMPLIFIER CONTROL UNIT Fig S Power Unit Schematic AC FIL PLATE DC 3 J2 03 4j 06J2 DC...

Page 20: ...v suu r y l D c 0 c liLJ r I RD I I I I I I I I L2 I ______ I _ I I I I I I I I I I LI I __ _ __ _ I GROUND i t i 1 IU W til JI I I I 110 O f VSI F F f __ II II 01 r I 2 4n 1 5 7_ 6 O Tl 0 100 n II a...

Page 21: ...wesrern Electric QUALITY COUNTS...