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TELE-TECH & - AmericanRadioHistory.Com

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Precision Frequency Source...<br />

ULTRA STABLE OSC /LLAT411,<br />

BOOKS<br />

Modern Physics:<br />

A Textbook for Engineers<br />

Hycon Eastern's new Ultra Stable<br />

Oscillator is a one megacycle signal<br />

source of exceptional stability. It is<br />

useful wherever precise time measurements<br />

or frequency control are<br />

required, as in reinsertion of carrier<br />

in suppressed carrier systems, telemetry,<br />

astronomical measurements,<br />

navigation systems, geophysics or<br />

other critical applications.<br />

STABILITY: i PART IN 109<br />

FREQUENCY STABILITY: DRIFT RATE LESS THAN 1 PART IN 109<br />

PER DAY AFTER ONE MONTH'S OPERATION.<br />

FREQUENCY: I MEGACYCLE, VARIABLE OVER A RANGE OF I<br />

CYCLE. AVAILABLE AT OTHER FREQUENCIES ON SPECIAL ORDER.<br />

CRYSTAL OVEN: STABILIZED TO BETTER THAN 0.01°C BY TEMPER-<br />

ATURE- SENSITIVE RESISTANCE BRIDGE. OVEN CONTAINS NO MOV-<br />

ING PARTS.<br />

DISSIPATION IN OSCILLATOR CRYSTAL: STABILIZED AT A POWER<br />

LEVEL LESS THAN ONE MICRO WATT.<br />

2 OUTPUTS: SINE WAVE -4 VOLTS RMS; PULSE -1 VOLT.<br />

OUTPUT IMPEDANCE: APPROXIMATELY 250 OHMS.<br />

Write for Ultra Stable Oscillator Bulletin<br />

HYCON EASTERN, INC.<br />

75 Cambridge Parkway Dept. E -6 Cambridge 42, Mass.<br />

Affiliated with HYCON MFG. COMPANY, Posodena, California<br />

By Robert L. Sproull. Published by John Wiley G<br />

Sons, Inc., 440 Fourth Ave., New York 16, N. Y.<br />

491 pp. Hard cover. $7.75.<br />

The need for nuclear- trained electronic<br />

engineers is so acute that the<br />

very title of this book should make<br />

it required reading for every well -informed<br />

engineer in the industry.<br />

The author, who is assoc. professor<br />

of physics at Cornell Univ., developed<br />

this book from notes used in a course<br />

for engineering undergraduates at<br />

Cornell, and in courses for practicing<br />

engineers at Westinghouse, Corning<br />

Glass and Sylvania. The approach is<br />

analytical, with emphasis on crucial<br />

experiments, and the elementary theory<br />

underlying the properties of<br />

atoms, molecules, solids, and nuclei<br />

is based on this analysis.<br />

Each of the chapters opens with a<br />

clear -cut and fundamental discussion<br />

of the material to follow. Mks units<br />

are used throughout.<br />

Chapter headings include: fundamental<br />

particles, assemblies of particles,<br />

atoms and nuclei, wave -particle<br />

experiments, introductory quantum<br />

mechanics, atomic structure and spectra,<br />

molecules, binding and energy<br />

bands in solids, semiconductors, physical<br />

electronics, and applied nuclear<br />

physics.<br />

The sections on solid -state physics<br />

and semiconductors will be invaluable<br />

to electronics engineers.<br />

Electronic and Radio<br />

Engineering<br />

By Frederick E. Termon. Published 1955 by<br />

McGraw -Hill Book Co., Inc., 330 West 42nd St.,<br />

New York 36, N. Y. Hard cover. 1078 pages.<br />

Price $12.50.<br />

The new title on this fourth edition<br />

of Terman's "Radio Engineering"<br />

reflects the increased emphasis on the<br />

general techniques of electronics. The<br />

book is divided into 3 parts. The first<br />

deals with transmission lines, and the<br />

basic circuit theory peculiar to electronics;<br />

the second, with electronic<br />

engineering - electronic devices and<br />

their applications; and the third, with<br />

radio engineering.<br />

Many additions have been made to<br />

the text, among them a chapter on<br />

microwaves, presenting an explanation<br />

of how the backward -wave oscillator<br />

(carcinotron) and the traveling<br />

-wave tube operate, as well as a<br />

chapter on transistors and semiconductors.<br />

The material on nonlinear<br />

waveforms and pulse techniques has<br />

been expanded, and the chapter on<br />

TV thoroughly revised. Increased attention<br />

is also placed on propagation<br />

involving the troposphere.<br />

(Continued on Page 62)<br />

60 For product information, use inquiry card on pages 209 -210. Tele -Tech & ELECTRONIC INDUSTRIES June 1956

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