NEWS
SAVE ON THESE PRECISION LAB INSTRUMENTS BY NEATH!
Factory Assembled,
Ί* Heath Operational Amplifier System
Heath Servo Chart Recorder
• Ideal for research & teaching applications • Completely self-contained with built-in bias & power supplies · Four operational amplifiers plus booster amplifier · Amplifier terminals (5-pin) accessible on front panel • Regulated D C + , DC— power supplies. A precision instrument for a wide range of scientific measurements. Operates as a constant current source, controlled potential source, linear sweep generator, or servo system simulator. Addition, subtraction, integration and differentiation can be pro grammed for measurement, computation and control work. EUW-I9A ...18 lbs
Tested, Ready To Use!
$135.00
S P E C I F I C A T I O N S - O P E R A T I O N A L AMPLIFIERS: DC G a i n , open loop: 21,000 (87 ± 1 db). Frequency response: to 450 kc. V o l t a g e range: - 5 0 V DC to + 50 V DC at input and output with a 50 Κ ohm load. Output current: —1 ma to 4-1 ma with 50 Κ ohm load. Output i m p e d a n c e : Less than 1.5 ohms. Phase shift: Less than 1 degree at 100 kc. Rise t i m e : ^ m i c r o seconds. Drift: Less than ± 8 mv/day under normal conditions alter 48 hours, or more, aging period. Amplifier I only: May be switched for Follower or Inverter operation, also to provide + or - i n p u t s . B O O S T E R A M P L I F I E R : M a x i m u m output: ±20 ma at ± 5 0 V DC. Gain: Approx.0.8. Output impedance: Less than 0.2 ohms. P O W E R R E Q U I R E M E N T S : AC INPUT: 105-125 volts, 50/60 cps. Filament power o n l y : 44 watts. T o t a l power required: 94 watts at guiescent operating condi tions. Fuses: Two X ampere slow-blow fuses; one for the filament circuits, and one for the DC ± and DC — supplies. A U X I L I A R Y P O W E R C O N N E C T O R : Location: Octal socket on rear ol unit. Power a v a i l a b l e : +300 volts at 20 ma and —300 volts at 20 ma with unit in operation; +300 volts at 60 ma and —300 volts at 60 ma when all a m p l i f i e r t u b e s a r e re moved. Balance resistors: Available at auxiliary connector to balance power supplies and adjust output voltages. G E N E R A L : Dimensions: l l J i ' W i Β'/,· Η χ 12%- D.
• Finest value in the industry—compares with units costing five times this price! · True potentiometric input on all ranges (10, 25, 50, 100, & 250 mv) · Plug-in 5-pin con nectors for special ranges · Uses inexpensive, practical cartridge-type pen · Pen lift · Paper tear-off guide · Rapid chart advance · One second balancing time for full 10" span. Compare this outstanding chart recorder with any other and see what a tremendous dollar value it represents! You'll find it the perfect answer to all your recording needs with many advanced design features for excellent accuracy and high stability. Op tional chart motors are available for specific time scales required. EUW-20A ...20 lbs $195.00 S P E C I F I C A T I O N S - C h a r t paper: Grid width, 10". Length, 120 foot roll. Markings. 0-100, right to left. Chart speed: 2 inches per minute (standard); replacement motors for special chart speeds available. Chart span: Five fixed ranges; 10, 25, 50, 100, and 250 mv, plus a sensitivity control to permit adjust ment for any value from 10 to 250 mv. Also external position available for special plug-in ranges. P e n : Standard fountain pen, cartridge type. Balancing t i m e : 0.1 second per inch, 1 second full scale (10"). Input circuit: Easily modified with 5pin connectors. Error (includes dead zone): Less than 1% of full scale for all ranges. 10 to 250 mv. M a x i m u m source resistance: 50 Κ ohm. Reference s y s t e m : Mercury cell. Reference cell life: 300 hours (approx.). Power require ments: 105-125 volts, 60 cps AC; 50 watts. Fuse: 1 ampere slow-blow. Dimensions: 13%"W χ ΒΥ,'Ή χ 1334"D
S E N D F O R FREE F O L D E R for full description of entire Malmstadt-Enke lab series equipment.
® HEATHKIT by Daystrom HEATH COMPANY Benton Harbor, Michigan 49023 Π Please send free folder on lab equipment. Q Please send free 1964 Heathkit catalog Name
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Address.
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City
State
Zip No EK-148
Circle No. 56 on Readers' Service Card
50 A
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ANALYTICAL CHEMISTRY
T u e s d a y M o r n i n g , M a r c h 24 S. R. LIPSKY, PRESIDING 9.00 Gas Chromatographic Analysis of Urinary Estrogens. Η. Η . Wotiz, Boston University School of Medicine, Boston, Mass. 9:30 Gas-Liquid Chromatography of Carbohydrates and Related Com pounds. C. C. Sweeley, University of Pittsburgh, Pittsburgh, Pa. 9:55 Characterization and Estimation of Organic Amines of Biological In terest. E. C. Horning, Baylor Univer sity College of Medicine, Houston, Texas. 10:20 Gas Chromatographic Analysis of Catechol Amines. C. J. W. Brooks, The University, Glasgow, Scotland. 11:00 A New Type of Liquid-Liquid and Liquid-Solid Chromatography. E. Bayer, Chemisches Institut der Universitat, Tubingen, Germany. T u e s d a y A f t e r n o o n , M a r c h 24 S. DAL NOGARE, PRESIDING 2:00 Performance of Argon Detectors in the Field-Intensified Current Re gion. J. Z. Knapp, Schering Corp., Bloomfield, N. J. 2:30 Measurement and Interpretation of the C terms of Gas Chromatog raphy. J. C. Giddings, University of Utah, Salt Lake City, Utah. 3:00 Temperature Limitations of Sta tionary Phases in Gas Chromatog raphy. S. J. Hawkes, University of London, England. 4:00 A New Method of Measuring D s and y. J. H. Knox, University of Edin burgh, Scotland. 4:40 The Effect of Particle-to-Column Diameter Ratio on Band Spreading. J. C. Sternberg Beckman Instruments, Inc., Fullerton, Calif. W e d n e s d a y M o r n i n g , M a r c h 25 I. S. FAGERSON, PRESIDING
9:00 Analysis of Flavors by Gas Chromatography. A. I. M. Keulemans, Technische Hogeschool Eindhoven, The Netherlands. 9:40 Analysis of Sulfur Compounds with Electron Capture/Flame Dual Channel Gas Chromatography. K. P. Dimick, Wilkens Instrument and Re search, Inc., Walnut Creek, Calif. 10:30 Thermoramic Programmed Gas Chromatography in the Separation of Very Complex Mixtures. C. Merritt, Jr., Quartermaster Research and Engi neering Center, Natick, Mass. 11:10 Capillary Column Gas Chroma tography—Mass Spectral Analyses of Volatiles from Orange Oil. R, Teranishi, U. S. Dept. of Agriculture, Albany, Calif. W e d n e s d a y A f t e r n o o n , M a r c h 25 R. D. SCHWARTZ, PRESIDING 2:00 Preparative Columns. C. Y. Sacodvnskv, Karpov Institute of Phys ical Chemistry, U. S. S. R. 2:40 Simulated Distillation by Gas Chromatography. L. E. Green, Ameri can Oil Company, Whiting, Ind. 3:40 Automatic Capillary Gas Chroma tography and Sampling of Distillation Products. D. W. Grant, The Coal Tar Research Association, Leeds, England. 4:20 Air Pollution Measurements by Gas Chromatography and Flame Ioni-
