Checking Out Airborne Radar

142 Pages·2015·11.84 MB·English

eJUNE l5,e1959 ctronics
A MCGRAW-HILL PUBLICATION VOL 32, No. 23 PRICE SEVEN -Y -FIVE CENT3
Checking Out
Airborne Radar
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LIBRARY
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Creative Microwave Technology AMIN
Published by Microwave and Power Tube Division, Raytheon Manufacturing Company, Waltham 54, Mass., Vol. 1, No. 4
NEW KILO -LINE RECORDING STORAGE TUBES SPECIALLY DESIGNED FOR SCAN CONVERSION
To meet the need for low -noise, high -reso-
lution devices for frequency and scan
conversion, Raytheon scientists and en-
gineers have developed two new storage
tubes: the single -gun QK-685 and the dual -
gun QK-703. These tubes are now available
in production quantities.
Both types incorporate a specially de-
signed tetrode electron gun for higher
-
resolutions 1,000 TV lines at 50%
modulation-and better control over beam
cut-off than conventional triode guns. A
new multiple collimating lens improves
background uniformity and results in
shading -to -signal ratios of less than 10%.
Typical Operating Characteristics
The ability of the dual -gun type to read
QK-685 and QK-703
and write simultaneously makes this tube
particularly applicable to slow -down Anode Voltage 4,000 Vdc (Max.)
Resolving Power
video and conversion from PPI to TV scan Magnetic Focus 1,000 Lines (Nom.)
Electrostatic Focus 700 Lines (Nom.)
patterns for "Bright Display." Output Capacitance QK-685-10 µµf (Nom.)
QK-703--20 µµf (Nom.)
Maximum Deflection Angle 30°
GRID TRANSFER CHARACTERISTICS
TYPICAL RESOLUTION CURVE
30 6l%1
1,, Vs EG, 100
m mmmem1. In vs EG,
25 500
Es,- 400V / II 80
I QK-685 an 03
20 I 400
// 60
QK-685 and QK-703
15 ' 3 00
40
10 i 200
20
5 i 100 o4 00 500 600 700 800 900 1000 1100 1200 T300
0 o RESOLUTION (NUMBER OF TV LINES)
40 -35 -30 -25 20 15 -10 5 0
G1 VOLTAGE (VOLTS)
You can obtain detailed application information
Excellence in Electronics and special development services by contacting:
Microwave and Power Tube Division, Raytheon
Manufacturing Company, Waltham 54, Massachusetts
A LEADER IN CREATIVE MICROWAVE TECHNOLOGY
electronics
JUNE 5, 1959
Issue at Glance
a
A McGRAW-HILL PUBLICATION
ll>:4SÑ5l'ess
Vol. 32 No. 23
What If Peace Breaks Out? A financial expert speaks 32
Transistors Run 15-1b Tv Set. Goes on market this week 37
JAMES GIRDWOOD, Publisher New Survey Shows Growth. Navy statistics on electronics industry 40
W. W. MacDONALD, Editor Aerial Photos In 2 Minutes. Here's how new system does it 47
Shoptalk 4 Over The Counter 19
JOHN M. CARROLL, Managing
Editor Electronics Newsletter 11 Market Research 24
MicAhsaseolc iaFte. TEodmitoarisn:o , FrHanokw arLde arKy., Washington Outlook 14 Current Figures 24
Janis, Sylvester P. Carter, Haig Financial Roundup 19 Meetings Ahead 50
A. Manoogian, Roland J. Charest,
William P. O'Brien, George Sideris, Engineering,
John F. Mason, William E. Bushor,
Ronald K. Jurgen, Thomas Emma, Field crew checks out performance of bomber radar equipment
SSaomlomueol n, WMe.b eMr, . SPy erVuogginei.l, Leslie using time -saving radar system tester. See p 58 COVER
Pacific Coast Editor (Los Angeles) Using Thin Films in High -Speed Memories. Magnetic films operate
Harold C. Hood; Midwestern Editor in millimicrosecond range By E. E. Bittmann 55
(Chicago) Harold Harris; New Eng-
land Editor (Boston) Thomas Ma- Radar Test Systems to Shorten Checkout Time. Full evaluation of
guire. airborne radar system is made on ground.. By W. F. Kroemmelbein 58
Art Director, Harry Phillips, Roy
Thompson. Electronic Switching in Phase Measurement. Measuring sign and
Production Editor, John C. magnitude of phase angle By F. Vrataric, Jr. 60
Wright, Jr., Bernice Duffy, Jean L.
Matin. Strobe Techniques Analyze Complex Mechanical Motion. Improved
Market Research, Edward De- strobe to study nonlinear motions By J. H. Blakeslee 62
Jongh, Marilyn Koren.
Editorial Assistants, Gloria J. Ultrasonic Cleaners. Table of ultrasonic cleaner characteristics.
Filippone, Arlene Schilp, Patricia By S. E. Jacke 65
LEalenadneorsr , ScChaaethfeerr,i neC aroMl cDWeeramvoetrt., Millimicrosecond Switching Diodes. High-speed units produced by
outdiffusion By J. Halpern and R. H. Rediker 66
BRUCE A. WINNER, Advertising Tube -Transistor Hybrids Provide Design Economy. Design steps for
Ssiaslteasn t MAadnvaegretirs. ingR . SSa.l esQ uMinat,n agAesr- regenerative hybrids By G. A. Dunn and N. C. Kekimian 68
and Buyers' Guide Manager. Fred Waveguide Switch Types. Operation and performance of seven
SPrtaenwka rHt,. WaPrrdo,m Boutisoinne ss MMaannaaggeerr.. generic types By J. W. Sutherland 71
George E. Pomeroy, Classified Sending Digital Data Over Narrow -Band Lines. Transmitting and
Manager. Hugh J. Quinn, Circula- receiving binary signals over voice circuits By J. L. Hollis 72
tion Manager.
New York: Donald H. Miller, Antenna Measurements. Nomogram finds phase deviation between
Henry M. Shaw, William J. microwave antennas By J. S. Hollis 76
Boyle. Boston: Wm. S. Hodgkin -
son. Philadelphia: Warren H.
Gardner. Chicago: Harvey W. O'erp.a rerieMflrt s
WCleervneelcakned,: PM. artTin. FeJ.g leyG. allSaayn. Research and Development. Electronic Micrometer Checks Jets 78
Francisco: T. H. Carmody, R. C. Components and Materials. How Constant -Power Tubes Perform 82
Alcorn. Los Angeles: Carl W.
Dysinger, D. A. McMillan. Denver: Production Techniques. Assembly Village for Varied Work 86
J. Patten. Atlanta: M. Miller. Dal- On the Market 92 Plants and People 128
las: Gordon L. Jones, Robert T.
Wood. London: E. E. Schirmer. Literature of the Week 122 News of Reps 131
Frankfurt: Michael R. Zeynel. New Books 124 Comment 132
Index to Advertisers 141
ELECTRONICS JUNE 5, 1959 1
WHY
HERE'S
THAN
MORE
3,000,
000
FILM POTS
SUPERCON
IN USE...
ARE
VIRTUALLY INFINITE RESOLUTION SUPERCON FILM POTS consist of a
non-metallic resistance film perma-
Eliminates servo hunting. Improves dynamic
nently bonded to a high temperature
response of feedback systems. plastic base with a precious metal
wiper riding on its polished- finish
GREATEST ACCURACY IN A GIVEN SIZE surface.This sturdy
one-piece shock, vi-
In a one -turn unit, Linearity to .01% ! Sine - bration and wear
Cosine to .025% resistant construc-
!
tion has proven sir
LONG LIFE AT HIGH SPEEDS perior, during 10
Typical field experience: 30,000,000 revolu- years of field use, to
the loose -wire, glued -assembly, wiper -
tions at 500 rpm. bouncing -from -turn -to -turn construc-
tion of wire -wound pots. No longer do
ULTIMATE IN RELIABILITY you have to compromise the accuracy
SUPERCON Film Pots are "FAIL-SAFE"; integ- or reliability of your system by the
limitations of wire -wound pots.
rity of winding does not depend on single hair- SUPERCON Film Pots easily meet the
like wire. requirements of the space age.
A COMPLETE RANGE OF SIZES FROM 1/2" TO 5' IN DIAMETER AVAILABLE
CIC is the largest manufacturer of Precision Film Poten-
tiometers, having pioneered in their development, with
a 10 -year record of supply to all branches of the Armed
Services and throughout industry. Our staff of technical
specialists is ready to assist you with your potentiometer
needs. Write for our catalog.
92 Madison Avenue, Hempstead, L. I., N Y.
2 CIRCLE NO. 2 READER SERVICE CARD CIRCLE NO. 3 READER SERVICE CAIRD--
Three voltage ranges:
For all power supply needs
0-200, 125-325, 325-525 VDC
through amperes:
7.5
1.5 AMPERE MODELS NEED ONLY 834" OF PANEL HEIGHT! LAMBDA
(metered) (unmetered)
MODEL C -1580M: 0-200 VDC, 0-1500 MA.580.00 MODEL C-1580: 0-200 VDC, 0.1500 MA.550.00
MODEL C -1581M: 125-325 VDC, 0.1500 MA.605.00 MODEL C-1581: 125-325 VDC, 0.1500 MA.575.00
MODEL C -1582M: 325-525 VDC, 0-1500 MA.680.00 MODEL C-1582: 325-525 VDC, 0-1500 MA.650.00
POWER SUPPLIES
Less space! Improved performance!
Long, trouble -free service!
800 MA MODELS NEED ONLY 7" OF PANEL HEIGHT! Transient free output!
(metered) (unmetered) Fills the need for compact, regulated DC power sup-
MMOODDEELL CC --888801MM:: 1250--322050 VVDDCC,, 00--880000 MMAA..337405..0000 MMOODDEELL CC--888810:: 1250--322050 VVDDCC,, 00--880000 MMAA....334105..0000 plies. Economy of panel space, functional simplicity,
MODEL C -882M: 325-525 VDC, 0-800 MA.390.00 MODEL C-882: 325-525 VDC, 0-800 MA..360.00 new quick -service features.
Wiring, tubes and other components readily acces-
sible. You can reach them easily, service them fast.
400 MA, 800 MA, and 1.5 ampere models include
new, high -efficiency, long -life, hermetically -sealed
semi -conductor rectifiers. All Com-Pak models are
constructed with hermetically -sealed magnetic com-
ponents and capacitors for long trouble- free service.
Condensed Data
400 MA MODELS NEED ONLY 51;4" OF PANEL HEIGHT! LINE REGULATION Better than 0.15% or 0.3
(metered) (unmetered) Volt, whichever is greater.
MODEL C -480M: 0-200 VDC, 0-400 MA.289.50 MODEL C-480: 0-200 VDC, 0-400 MA 259.50 LOAD REGULATION Better than 0.25% or 0.5
MODEL C-481 M: 125-325 VOC, 0-400 MA.274.50 MODEL C-481: 125-325 VDC, 0-400 MA..244.50 Volt, whichever is greater.
MODEL C -482M: 325-525 VDC, 0-400 MA.289.50 MODEL C-482: 325-525 VDC, 0-400 MA..259.50
INTERNAL IMPEDANCE
C- 200 Series Less than 6 ohms.
C- 400 Series Less than 3 ohms.
C- 800 Series Less than 1.5 ohms.
C-1500 Series Less than 0.75 ohms.
RIPPLE AND NOISE Less than 3 millivolts rms.
POLARITY Either positive or negative
may be grounded.
200 MA MODELS NEED ONLY 51/4" OF PANEL HEIGHT! AMBIENT TEMPERATURE Continuous duty at full load
up to 50°C (122°F) ambient.
(metered) (unmetered) AC OUTPUT
MODEL C -280M: 0-200 VDC, 0.200 MA.214.50 MODEL C-280: 0.200 VDC, 0-200 MA..184.50 (unregulated) 6.5 VAC (at 115 VAC Input).,
MMOODDEELL CC --228812MM:: 312255--532255 VVDDCC,, 00-.220000 MMAA..118999..5500 MMOODDEELL CC--228812:: 132255.-352255 VVDDCC,, 00-.220000 MMAA....115699..5500 C- 200 Series 10 AMP
C- 400 Series 15 AMP
C- 800 Series 20 AMP
C-1500 Series 30 AMP
AC INPUT 105-125 VAC, 50-400 CPS
OVERLOAD PROTECTION AC and DC fuses; built-in
blown -fuse indicators.
NEW 1959 CATALOG N OW AVAILABLE
New 36 -page edition contains information and specifications on Lambda's
full line of transistor -regulated and tu be -regulated power supplies.
nd
ALL LAMBDA POWER SUPPLIES ARE GUARANTEED FOR FIVE YEARS.
for
ur LAMBDA ELECTRONICS CORP.
'opy.
11-11 131 Street, College Point 56, N. Y.
...
SHOPTALK editorial
electronics
REDS AND RED INK. In club cars, hotel suites and board rooms
many an inquiry into the state of business is concluded with the
June 5, 1959 Vol. 32, No. 23
remark, "What would our firm do without the government?" A fitting
Published weekly, with an additional an- observation these days when military electronics accounts for more
nual BUYERS' GUIDE and REFERENCE than half our industry's factory- door sales.
Issue in mid- June, by McGraw-Hill Publish-
ing Company, Inc., James H. McGraw You can bet the Russians are just as aware of how dependent
(1860-1948) Founder. our economy is on military spending. And there is a 50-50 chance
the next Soviet offensive will be an economic one, replete with dulcet
EOxffeicceust:i veM, cGErdaiwto-rHiailll, BCuiirlcduinlagt,i o3n3 0 aWnd. 4A2 dSvet.r,t isNinewg tones to lull us into complacency. This offensive would have a double-
YOoffricke : 3969, -1N29. NYo. rth LoBnrgoaacdrwe ay4, .3A00lb0a. ny P1u, bNli.c aYti.o n barreled effect: to denude our national defenses and to wreak eco-
nomic havoc at home.
See panel below for directions regarding New York financial expert Casper Bower is one man who thinks
sCu. bsMcrciGptriaown,s Porr escihdaenngte; oJfo saedpdhr eAss.. GDeroanradlid, this Communist economic threat is a real and present one. And he
Executive Vice President; L. Keith Goodrich, faces up to the unpleasant truth that such a Red peace offensive
Vice President and Treasurer; John J. could splash deep red ink on the ledgers of many U. S. electronics
Cooke, Secretary; Nelson L. Bond, Presi-
dent, Publications Division; Shelton Fisher, firms heavily engaged in military work. There are lots of other
Senior Vice President; Ralph B. Smith, complications, too. Read about it as one industry expert speaks his
Vseipche HP.r esAidlleenn,t Vanicde EPdreitsoirdieanl t Danirde cDtoirr;e ctJoor- mind in our story "What If Peace Breaks Out?" on p 32.
of Advertising Sales; A. R. Venezian, Vice
President and Circulation Coordinator. MARKET RESEARCH. Our Market Research department, which
appears on p 24, is prepared weekly by Ed DeJongh, who heads up
Single copies in the United States, U. S.
possessions & Canada 750; $1.50 for all ELECTRONICS' Market Research staff. DeJongh has an MBA from
other foreign countries. Buyers' Guide in Harvard's Graduate School of Business, is a graduate of Oberlin
tChaen adUan i$t3ed.0 0;S taaltle so,t heUr . foSre. ignp o$s1se0s.0si0o. nsS ub&- College. He is ably assisted by Marilyn Koren, a Syracuse graduate
scription rates-United States and possessions, who received her Master's from the University of Minnesota.
$6.00 a year; $9.00 for two years; $12.00 for The market research department collects and develops market
tfhorre et wyoe ayrse.a rCs;a na$d2a0,. 00$ 1f0o.0r 0 thar eey eayre;a rs$.1 6A.0l0l data about the electronics industry, not only for our editorial
other countries, $20.00 a year; $30.00 for two columns but also for this magazine's internal planning and guidance.
ypoeastrasg; e $4p0a.i0d0 afto r Atlhbraeney ,y eNar.s . Y.S ePcroinndt edc lasins This wealth of hard -to -come- by marketing facts about our industry
U.S.A. Copyright 1959 by McGraw-Hill Pub- is likewise available to ELECTRONICS' friends in industry.
lishing Co., Inc.-All Rights Reserved. Title
registered in U. S. Patent Office. BRANCH
OFFICES: 520 North Michigan Avenue,
Chicago 11; 68 Post Street, San Francisco
4; McGraw-Hill House, London E. C. 4; Coming In Our June 12 Issue . .
85, Westendstrasse, Frankfurt/Main; Na-
tional Press Bldg., Washington 4, D. C.; Six
Penn Center Plaza, Philadelphia 3; 1111 COOLING FIN DESIGN. Since the advent of semiconductor devices,
HPuenbrlyic WSq. uaOreli,v eCr leBveldlagn.d, P1i3t;t sb8u56rg hP en2o2b; sc5o5t electronic circuit designers have become more concerned than ever
Bldg., Detroit 26; 3615 Olive St., St. Louis with heat dissipation in circuit components. Temperature depend-
8; 350 Park Square Bldg., Boston 16; 1301 ence of semiconductor devices is well known, and this has resulted
Rhodes- Haverty Bldg., Atlanta 3; 1125 West
Sixth St., Los Angeles 17; 1740 Broadway, in new burdens on the designer to create and maintain the proper
Denver 2; 901 Vaughn Bldg., Dallas 1. environment within his equipment package.
EELngEiCneTeRriOngN ICInSd eixs. indexed regularly in The Happily, as often emphasized in ELECTRONICS, graphical methods
can illuminate areas where engineers ordinarily fear to tread.
Sfilulmbescnrti ptMioann: agAedrd, resEsl eccotrrorensicpso,n de3n30c e Wto.: 4F2unld- WCo. rLp.u, fth, aas Parsosedmucbtl eAd naa lyusste Efunlg iannede r pweirtthin ethnet Ianrtteicrnlea tiwohniaclh Ruetcitliifzieesr
Scht.a,n gNee wo f Yaodrdkr e3s6s, , Ns.t aYtin. g Aolloldw aso new emll oansth nfeowr charts, graphs, and nomograms for designing cooling fins for such
ascdrdirpetsiosn, s inacrelu dsinolgic itpeods taoln lyz onfreo mi f paenrsyo. nsS uebn-- devices as power transistors, power diodes, zener diodes, others.
gaged in theory, research, design, production,
management, maintenance and use of elec-
tpraorntsic s anadn d proidnudcutsst. riaPl OScoITntIOroNl caonmd poCneOnMts-. STATIC PRESS CONTROL. Static control devices for machine
PANY CONNECTION must be indicated on tools are becoming commonplace in industrial plants. However,
subscription orders.
incorporation of static switching for the control of a press presents
problems of safety not ordinarily present in other machine tools.
Postmaster: please send form 3579 to
Electronics, 330 W. 42nd St., New York 36, Reliability of the control circuits must be unusually high.
N. Y. S. A. Zarleng, Development Engineer for the Clark Controller Co.
in Cleveland, has devised an anti -repeat control for a press which
qBp makes it impossible for the operator to work the ram while his hands
are in the danger zone. Furthermore, the operator cannot bypass
Member ABP and ABC any of the safety restrictions. The control is built around a pnp tran-
sistor, a pulse transformer consisting of three windings on a small
toroidal core, and two specially -designed magnetic amplifiers.
JUNE 5, 1959 ELECTRONICS
4
RELIABILITY
SPRAGUE®
In these two dependable
wirewound resistors
MINIATURE NEW SMALLER SIZE
f
VITREOUS -ENAMEL POWER RESISTORS
Sprague's new improved construction gives even
greater reliability and higher wattage ratings to fa- INSULATED -SHELL POWER RESISTORS
mous Blue Jacket miniature axial lead resistors.
A look at the small actual sizes illustrated, em- New Koolohm construction features include welded
phasizes how ideal they are for use in miniature leads and winding terminations-Ceron ceramic-
2W
----
21hW
=3W
5W
.7W
10W
.11W
14W
electronic equipment with either conventional wir- insulated resistance wire, wound on special ceramic
ing or printed wiring boards. core-multi-layer non -inductive windings or high
Get complete data on these dependable minified resistance value conventional windings-sealed, in-
resistors, write for Engineering Bulletin 7410. sulated, non -porous ceramic outer shells-aged-on-
TAB -TYPE BLUE JACKETS: For industrial applica- load to stabilize resistance value.
tions, a wide selection of wattage ratings from 5 to You can depend upon them to carry maximum
218 watts are available in Sprague's famous Tab - rated load for any given physical size.
Type Blue Jacket close- tolerance, power -type wire - Send for Engineering Bulletin 7300 for complete
wound resistors. Ideal for use in radio transmitters,
technical data.
electronic and industrial equipment, etc. For com-
plete data, send for Engineering Bulletin 7400A.
SPRAGUE ELECTRIC COMPANY SPRAGUE®
35 MARSHALL STREET NORTH ADAMS, MASS. THE MARK OF RELIABILITY
SPRAGUE COMPONENTS: RESISTORS CAPACITORS MAGNETIC COMPONENTS TRANSISTORS
INTERFERENCE FILTERS PULSE NETWORKS HIGH TEMPERATURE MAGNET WIRE PRINTED CIRCUITS
ELECTRONICS JUNE 5, 1959 CIRCLE NO. 5 READER SERVICE CARD 5
ANNOUNCING
.. .
a new concept in SILICON supply
Right off the bat you start doing things the way Then, devote your efforts exclusively to the pro-
they should be done. -a duction of ultra -pure silicon in every form.
You pick men who know top-flight manager ...
This is Allegh-eany Electronic Chemicals Co.
from the process field, and a well -versed gentleman
And this is for you new concept in silicon sup-
from the semiconductor field. Then add experienced
ply, a new service for the semiconductor industry.
semiconductor men who understand the device
manufacturer's problems. That's your management Your inquiries are invited. Write to Allegheny
group. Electronic Chemicals Co., 207 Hooker -Fulton Bldg.,
-
Next provide a plant. Select a site where condi- Bradford, Pennsylvania, or 252 North Lemon St.,
tions are particularly favorable as they are near Anaheim, California.
the Allegheny National Forest.
ALLEGHENY
Silicon polycrystalline bulk, cast
billets and rods, single crystals, slices,
seeds and dope. ELECTRONIC CHEMICALS CO.
207 HOOKER-FULTON BLDG., BRADFORD, PA.
producers semiconducting materials for the electronic industry
of
6 CIRCLE NO. 6 READER SERVICE CARD JUNE 5, 1959 ELECTRONICS
15kw SBand Amplifier Klystron
has no heavy magnets
Exclusive Space -Charge Focus cuts weight to only 6%2 lbs.
SAS -61 SPECIFICATIONS
Frequency Range . 2700 to 2900 me CATHODE
Heating Time 90 sec.
Peak Power Output . . 15kw
Maximum Drive Power 30w
Power Gain 30 db
COLLECTOR
New Space Charge Focus principle of
beam control is shown in diagram.
New Sperry tube design utilizing this
principle reduces size, weight, power
consumption and cooling needs.
AVAILABLE FOR IMMEDIATE DELIVERY, struction withstands extreme vibration tunable cavities is a complete micro-
Sperry's new S -band transmitting tube and environmental conditions. wave unit. No external equipment is
gisa ina a3n -dc aevxittyra -pluolnsge saemrvpiclief ileirf e.o f high MAIN APPLICATIONS for the SAS -61 are required.
as an output tube in low -power radars, SPERRY CAN DELIVER SAS -61 tubes in
EXCLUSIVE SPERRY SPACE -CHARGE or as a driver for higher -powered klys- quantity at once. Write or phone your
FOCUSING design eliminates hea-v y, trons in radar and linear accelerator nearest Sperry district office.
cumbersome magnetic structures a systems. Its unusually Iong service life,
feature of prime importance in equip- however, makes it highly desirable for
ment design. Although the SAS -61 any application requiring 15 kw in the
weighs only 61/2 lbs., its sturdy con- S -band. The SAS -61 with its internal sPERRY
ELECTRONIC TUBE DIVISION, SPERRY GYROSCOPE COMPANY, GREAT NECK, NEW YORK, DIVISION OF SPERRY RAND CORPORATION
Address all inquiries to Great Neck or Sperry offices in Brooklyn, Boston, Philadelphia, Los Angeles and Montreal. Export Dept.. Great Neck, New York
ELECTRONICS JUNE 5, 1959
CIRCLE NO. 7 READER SERVICE CARD 7
-!- COUNT AMBIGUITY ELIMINATED!
1
OLD WAY X counts __ count due to unknown phase at start and stop.
1
NEW -hp- 218A X counts exactly-timing wave starts with sync pulse and only full cycles counted!
TO T1
New ease,
46 for precision
Time measurement and pulse simulation and future versatility, output pulses are generated
in radar, loran, Tacan, DAM, oscilloscopes, through -hp- 219A series plug-in units.
computers, fast gates, pulse code systems Model 218A is a direct slave to an external trigger,
-almost any fast circuit double pulse measurement 0 cps to 10 KC, or may be triggered internally over
with any kind of delay may now be made quickly a 10 cps to 10 KC range. A push-button manual trig-
and accurately with the new -hp- 218A Digital De- ger is also provided. The two delay pulses are sep-
lay Generator. arately and digitally adjustable from to 10,000
1
Constructed along rigid military standards, the -hp- µsec with interpolation 0 to 1 µsec. Timing accuracy
218A is basically a pulsed crystal oscillator synchro- is ± 0.1 µsec ± 0.001% ; time interval and pulse
nizable in constant phase with an initial trigger pulse characteristics are directly selected on front panel
(zero time) and two positionable terminating pulses. controls.
Time is counted with a 1 MC preset counter, and Brief specifications appear alongside; for complete
two independent output pulses (T1 and T2) are details see your -hp- representative or write direct.
available in any relationship. For utmost present Also request -hp- Journal,. Vol. 9, No. 8.
OR.'
'
+ï. A
I
B l B
TO 12 T0 T1 j2
.hp- 219A Dual Trigger Unit contains two blocking oscilla- -hp- 2198 Dual Pulse Unit contains two pulse generators pro-
tors supplying positive polarity trigger pulses to control viding digitally delayed, fast rise time, high power pulses.
auxiliary equipment. Pulse A available at To or T,; pulse Positive or negative polarity, amplitude variable 0 to 50 v,
B at T2. Pulse characteristics identical to sync output pulse pulse width variable 0.2 to 5 µsec, rise time 0.06 µsec. Pulse A
of -hp- 218A. (See "Specifications") $100.00. available at To to Ti, pulse B at T2. Internal impedance is 50
ohms. $450.00.
offers the world's most complete
8 CIRCLE NO. 8 READER SERVICE CARD JUNE 5, 1959 ELECTRONICS