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SHOW-MANUFACTURE
New products and equipment to raise the performance level of broadcast advertising.
Recordings
CUTTERHEAD AVith standards in lateral recording constantly being pushed upivard by iniproveinents in radio broadcast cjiiality, including the FM system, Fairchild Camera 8: Instrument Corp., New York, began its search for a better, more stable cutterhead, capable of putting on to the record the necessary wider, distortion-free response. The new Unit 514 is the result.
What the cutterhead (standard ecjuipment on Fairchild's latest portable recorder, also in production) has to recommend it to radio and professional recording: recordings at unusually high \()hnne level with little increase in distortion, desirable both from the standpoint oi instantaneous recordings and in the making of masters for pressings, since the greater the volume level the less will be the imdesirable surface noise, or scratch. At 98 lines per inch, the cutterhead is capal)l(' of lulh modulating the groove.
SPECIFICATIONS: Distortion: Less than 1 per cent, 400 cycles. A recording of a 400-cycle note was made at a recording level of plus 18 db (reference .006 watts) to produce a stylus velocity of 2.5 inches per second.
Frequency Response: Plusminus 2 db, ?0-8,000 cycles. Impedance: 500 ohms.
Audio Power Required : 0.6 watts (plus 20 db).
Size Stylus Accommodated: yH-inch long, 0.0062-inch diameter.
COMMENT: 1 I is ( oni j>ara(ively eas\ lo j)»() (hue a unil with a wide irecjuciK y response, bin distoi I ion is ;mi()I lici matlei .
Reproductions
LOUDSPEAKER By combining both high and low frequency units in a compact, two-way multi-cellular loudspeaker requiring less than one and one-half cubic loot of space, Altec Lansing Corp., Hollywood, Cal., has provided a point source of high quality sound for monitoring, radio, public address and recording. New speaker, in actual performance, delivers up to 500 per cent greater efficiencies in these operations, also delivers very high quality in home radio, phonograph and FM reproductions.
This new multi-cellular speaker pro\ides up to 1,200 per cent increased area of distribiuion. In the horizontal plane, it deliveis 12 times the area distribution at high frecjuencies as compared to the usual single unit speakers of comparable size.
Speaker is available separately or mounted in a walniu finished cabinet. Cabinet provides eight cubic feet of air space. Special cabinets for ceiling and sidewall mounting are available on lecjuest.
SPECIFICATIONS: Horizontal Area of Distribution: 60 degrees.
Vertical Area of Distribution: 40 degrees.
Impedance: 20 ohms.
iiaiti Amplifier: A small, compact 60 DB gain amplifier with 15-watt output is also available for driving the speaker.
COMMENT: Combined improx cmenls in Ire<|iicn(\ lange. (jnalily i(|)r()(iu( tion and wide areas of distril)u(ion promise lo rexolut ionize sound reproduction.
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RADIO SHOWMANSHIP