ΝEW R-C Oscillator For More P o w e r . . . Type 1210-B becomes 3-watt R-C Oscillator with Type 1206-B Unit Amplifier, $85 and Unit Power Supply, $40.
Becomes Sweep Generator....*.... i U J ) :. •..;.•... i j , . : . . : Synchronous-Dial Drive, $27.50, and Type 1210-P1 Discriminator, $75 (at right), for supplying CRO voltages.
Type 1210-B Unit R-C Oscillator, $140, with Type 1203-A Unit Power Supply, $40. *
The new Type 1210-B Unit R-C Oscillator is a unique audio, supersonic and radio-frequency generator . . . providing both square waves and sine waves over the range from 20 cycles to 0.5 Mc. Its wide range, multiple output sys tem, easy adaptability to sweep operation and extreme versatility, make it a must for every development and measurement laboratory. Features include : Utomatlc Data Taking...with pen-type recorder ' CRO eliminates laborious point-by-point measuree n t s . . . in photo, frequency response of small loud>eaker is recorded. ~
* Slow-Motion Frequency Control: for small frequency increments; each decade covered by 4'/i turns of knob. * Precision Dial : can be motor driven by Type 908-P Synchronous-Dial Drives for automatic display of amplitude-frequency characteristics; 908-P1 covers one frequency decade in 50 sec, 908-P2 takes 6% sec per decade . . . $27.50 for either. * Three Outputs : Low-Voltage, Low-Impedance (0 to 7 v, 50 Ω ) ; constant within ± 1 db to-200 kc; less than 1% no load distortion from 200 c to 20 kc, less than 1.5% over entire range; hum at least 60 db down. High-Voltage, High-Impedance (0 to 45 v, 12.5 kO): constant within ± 1 db and less than 5% distortion at no load from 200 c to 200 kc (decreases to 2.5% under load); hum at least 50 db below maximum output. Square waves (0 to 30 ν peak-to-peak) : 2500 Ω output impedance ; less than 0.25MS rise time and 1% overshot; hum at least 60 db down.
Network Transient Investigations.. .with R-C oscillator square waves; one measurement gives Information on both amplitude and phase characteristics . . . in photo, engineer observes and records filter characteristics of G-R Type 1550-A Octave-Band Noise Analyzer.
* Adjustable Output Control: logarithmic, calibrated 0-50 db. * AVC System: fast response, insures constant output under fluctuating line voltage. * Power Supply: Type 1203-A recommended for use on 115 v, 50-60 cycle power; Type 1202-A Unit Vibrator Power Supply for field operation from standard 6 ν or 12 ν storage battery. * Rack Mounting Provision: Type 480-P4U3 Relay Rack Panel, $12.50, for laboratory use. AS Bridge Generator,.. shown with new G-R Universal Audio-Frequency Bridge and Type 1212-A Unit Null Detector, $145.
The G-R Unit R-C Oscillator is the latest addition to the ever growing, evei more useful line of G-R Unit Instruments. G-R Unit Oscillators are now available for coverage from 20 cycles to 2000 Mc . . . the Unit Pulse Generator provides pulse durations of 0.2-60,000 Msec with repetition rates from 30 c 100 kc, and rise times of 0.05 ^usec . . . the Unit Null Detector has better than 40 μν sensitivity . . . a Unit Amplifier is available with 3-watt maximum output and 20 c-to-250 kc range . . . the Unit Crystal Oscillator has short-term stability of 1 ppm . . . the Unit I-F Amplifier is a basic component in the 50-5000 Mc G-R HighFrequency Null Detector . . . this apparatus, compact, intercon nectable, rugged and reliable in performance, represents the most in instrumentation value per dollar available anywhere.
AS Modulator... Unit'R-C Oscillator square-wave modulates the recently announced Type 1218-A UHF Unit Oscillator, $465., with SOO-2000 Mc range.
WE SELL DIRECT. Prices are net, F.O.B. C a m b r i d g e or West Concord, M a s s .
GENERAL RADIO Company 27-5 Massachusetts Avenue, Cambridge Massachusetts, U. S. A. For Coverage from 20 Cycles to 2000 Megacycles... Circle He. 31 A en Readers' Service Card, page 29 A
90 West Street NEW YORK 6 8055 13th St., Silver Spring, Md.WASHINGTON. D. C. 1150 York Road, Aoington, Pa. PHILADELPHIA 920 S. Michigan Ave. CHICAGO 5 1000 N. Seward St. LOS ANGELES 38
