Rauland 1295 Microphone 电路图.pdf

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1、OUTSTANDING PERFORMANCE, APPEARANCE AND DEPENDABILITY The model 1295 is a dual impedance, omnidirectional dynamic desk microphone offering modern styling and features in a rugged Cycolac housing for all industrial and commercial public address and paging applications. The Model 1295 has a slide swit

2、ch for low or high impedance selection. The wide band frequency response is smooth and peak free, with a slight rise above 2K Hz to give that “natural” highly intelligible sound. The microphone and relay switching is accomplished with a long life DPDT professional leaf switch and a simple push bar c

3、ontrol with locking capabilities, to give years of dependable, trouble free performance. The 1295 is manufactured to take normal abuse and retain its performance over a long life. Four molded “feet”, non-skid, non-marring, permanently resilient, ore located under the zinc die cost base. Supplied wit

4、h 2.1 m (7 ft.) of four conductor, two shielded cable, the Model 1295 5microphone circuit is wired line-shorting in the high impedance position and normally open in the low impedance position. Available in black Manufactured in the U.S.A. . E L E M E N T : ? PATTERN: - F R E Q U E N C Y RESPONSE: O

5、UTPUT: ? IMPEDANCE: . S W I T C H : ? CABLE: . D I M E N S I O N S : . W E I G H T : 687 grams (24 oz.) ? FINISH: Durable molded Cycolac in black, white or beige colors with die cast base painted in a complimentary color S P E C I F I C A T I O N S Dynamic Omnidirectional 50 to 12,000 Hz Hi Z: -55dB

6、 (0dB = 1 volt/microbar) -151dB E I A Lo Z: -58dB (0dB = 1 mw/10 microbars) -76dB (0dB = 1 volt/microbar) -152dB EIA Hi Z: 40,000 ohms, matches 100K ohms or greater Lo Z: 400 ohms, matches 125 to 1000 ohms Control: DPDT professional long life leaf switch, operated with a simple push bar Impedance: D

7、PDT slide switch located on underside of the microphone. 2. 1 m (7 ft.) of heavy duty four conductor (two shielded) cable 238mm (9 3/8”) high; 110mm (4 1 1/32) wide; 148 mm (5 27/32”) deep A P P L I C A T I O N S PUBLIC ADDRESS AND PAGING: A superior microphone for installations where quality of rep

8、roduction is desired. Modern styling plus rugged con- in such applications as airport control towers, police, fire and taxi dispatching, office factories, schools, fast food outlets, movie theaters, etc. specialists in Sound and Internal Communications R A U L A N D - B O R G C O R P O R A T I O N 3

9、535 West Addison Street, Chicago, Illinois 6O618 RadioFans.CN 收音机爱 好者资料库 o MODEL 1295 . FREQUENCY RESPONSE 50100 2 0 0Hz 5001K 2KHz5K10K2OK FREQUENCY IN HERTZ W / SOLDER HOLE , I M P E D A N C E The model 1295 is a dual impedance microphone. The high impedance position is 40,000 ohms and the low imp

10、edance is 400 ohms. The low impedance position is recommended for long cable length requirements. Cable lengths of 30.5m (100 ft.) or more con be used in this position without loss of level or deterioration of high frequency response. C A B L E E N D C O N N E C T I O N S HI IMPEDANCE: Connect the r

11、ed lead to the audio input, the block lead and shield to ground, and the white and green to relay control. LO IMPEDANCE: Connect cable leads red and black to balanced line input, shield to ground, white and green to relay control. P H A S I N G Positive pressure (movement of diaphragm inward) will g

12、enerate o positive voltage on the red cable lead with respect to the block lead. ARCHITECTS A N D E N G I N E E R S S P E C I F I C A T I O N S The microphone shall be a Rauland model1295 The microphone shall be a dynamic moving coil type with a diaphragm made of Mylar. The frequency re- sponse shal

13、l be 50-12,000 Hz, smooth and peak free, but with a slight rise above 2K Hz. The output level shall be -55dB (0dB = 1 volt/microbar) in the high im- pedance (40K ohms) position and -58dB (0dB = Imw/10 microbars) in the low impedance (400 ohms) position. The microphone hall hove a grille assembly con

14、sisting of a steel mesh screen and foam filter for protection in difficult environments. molded Cycoloc and die cast base with four non-skid, non-marring, permanently resilient molded “feet”. The microphone housing shall be a simple push bar with locking capability. An on-off professional DPDT leaf

15、switch shall be operated by The high or low impedance selection shall be mode with a DPDT slide switch located on the under side of the microphone. The microphone hall hove a permanently attached 2.1 m (7 ft.), four conductor (two shieldod) cable, with the microphone circuit wired line-shorting in the high im- pedance position and normally open in the low impedance position. The overall dimensions of the microphone shall be 238mm (9 3/8”) high, 110 mm (4 1 1/32”) wide and 148 mm (5 27/32”) doep. The woight shall be 687 grams (24 oz.). RadioFans.CN 收音机爱 好者资料库