in Public-Address Systems TV Servicing or Industrial Electronics

118 Pages·2013·9.76 MB·English

Ironies
World
SEPTEMBER, 1961
Impedance Matching
50 CENTS
in Public-Address Systems
TV Servicing or
Industrial Electronics?
How to Select
A Tape Machine
elow the Broadcast Band
33>iNVA',
IS HIPS N Z199
N3V18)0 0 i
--T-77.Z1001,m
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SYLVANIA'S
C-1
D
covers the line!
New Sylvania 9- transistor kit provides
replacement for over 300 NPN and PNP types.
You Save Money- reduce inventory requirements -eliminate slow -
moving stock that can tie up your cash. You simply stock the new Sylvania TYPE JOB REPLACEMENT
kit of 9 fast -moving SYL types instead of more than 300 different types. NUMBER DESCRIPTION FOR
You Save Time -with only 9 types to choose from, plus the new Quik-
SYL 101 NPN, cony., mixer, osc. 18 types
Pik -Pak, you speed up servicing work, cut down bench time. SYL 102 NPN, if- amplifier 24 types
Free Coupon Worth $12.50 toward the purchase of SYL 103 NPN, af- amplifier driver 21 types
the famous $25 twelve -lesson Sylvania /RTTA "Transistor SYL 104 NPN, of -power amplifier 12 types
Servicing" course is included. Kit pays for itself SYL 105 PNP, cony., mixer, osc. 30 types
immediately. SYL 106 PNP, if- amplifier 40 types
Free Replacement Guide, listing the more than 300 SYL 107 PNP, af- amplifier driver 60 types
transistor types for which Sylvania's BIG 9 can be substi- SYL 108 PNP, af- amplifier output 65 types
tuted, is included in every kit. Handy size for pocket SYL 109 P(pNoPp,u alaf-r a mauptolif ierard piow rt yopuet)p ut 54 types
carry or wall mounting. Your distributor has extra copies,
too. Ask for one.
AT YOUR SYLVANIA TUBI DISTRIBUTOR'á.,.NOWI
SYLVAN
SUBS /O /ARV OF GENERAL
GENERAL TELEPHONE & ELECTRONICS
s
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i
Two outstanding products by the HIDDEN who plan for your future:
0*
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dipped tubular
...
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ORANGE DROP Dipped Tubulars are the perfect replacement for radial-
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Get your copy of Catalog C -614 from
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Sprague Products Co., 51 Marshall St.,
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THE MARK OF RELIABILITY
WORLD'S LARGEST CAPACITOR MANUFACTURER
EinLgE CpToRsOseNsIsCioSn sW aO'tR1 LDC anIsa dpau b$l5is.0h0 e0d: r mPao Anuthth.o rbisye d% IbRyD avls COPofuufincbtelri siehsi ng$ 5.5o0m:p a.n'lsll t atht e4n3 4fo arSenoaigu nth acWso uanbatrsiehs A$Cv0ela.1ns1us1 e1..m CSa ethtceiocr a. g,loS eCpSla.t essmI llbipneoros it1sa0.g 0eS1 .up bavsoicl lr.i apt0t i0oC.n h Nicroaa.t geo3s.. : oIlnlien oyiesa a ra nUdn itaeddd itSiotantaels minacilluin,gl.
September, 1961 1
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.0-13
NEW! WV -77E
ELECTRONIC INSTRUMENTS
RCA VOLTOHMYSTe
"PREFERRED BY PROFESSIONALS" Mtoe a1s5u0r0e sv oAltCs ; arneds isDtCa nvcoel tafrgoems
0.2 ohm to 1,000 megohms.
Separate scales, 11/2 volts rms
and 4 volts peak -to -peak for
METERS and TUBE TESTERS low AC measurements.
Only $43.95' complete with probes, leads,
instructions. (RCA VoltOhmyst Kit only $29.95').
WV -38A VOLT -OHM -MILLIAMMETER NEW! WV-988
THE V -O -M WITH THE EXTRAS! SENIOR
Compare this superlative RCA V -O -M against the model you may VOLTOHMYSTP
have been thinking of buying. See if it doesn't check out better Measures AC and DC volt-
in these extra features: ages (3% accuracy); re-
sistance from 0 to 1,000 megohms. Measures
EXTRA! 1.0 volt and 0.25 volt ranges DC! peak -to -peak values of complex waveforms.
Rugged cast aluminum case, big 642" meter.
EXTRA! Big easy -to -read 51/4" meter! Only $79.50 with leads, clips, instructions.
EXTRA! Non -breakable plastic case; no glass to crack or shatter! Also available in economical kit form.
EXTRA! Smart attractive modern styling-the V-O-M of the future!
EXTRA! Red test lead has probe and slip -on alligator clip for WT -110A
added versatility! '' AUTOMATIC
EXTRA! Orderly location of jacks below switches keeps ELECTRON
leads out of the way!
TUBE TESTER
EXTRA! Spring clips on handle to hold test leads!
Especially designed for
EXTRA! DB scales clearly marked: no squinting! TV and general service
EXTRA! Rugged, scuff- proof, stain -resistant laminated vinyl carrying case, tpeusnctihnegd -coafr de sleecletrcotinon toufb ceosr.r eUcts etess t acuotnodmitiaotnics
only $4.95' extra! on wide variety of tubes. Checks vacuum -tube
only $43.95* caonmd pcleatbele sw- it(hR CbAa Vtt e-Or i-eMs ,K iitn sotnrulyc ti$o2n9 .9bo5o1k. and all probes, clips $2r4e1 c9tbi9fli.ae5nr0sk uccnaodrmdesrp , lhecitgeahr d -w cuiptrhuren cn2ht 6,-3 c oinnpsdutinrtuicochnteisod. n cbaordosk.,
SCOPES GENERATORS
NEW! WA- 44C
WO-91A
AUDIO GENERATOR
5INCH
Generates sine and
v10 COLOR -TV square wave signals for a a For alignment and signal
4 , OSCILLOSCOPE testing audio systems. ° tracing of AM /FM re-
r 8 Frequency range: 20 cps to 200 Kc. Used to ceivers. low- frequency
measure i ntermodulation distortion, frequency signal tracing and alignment of TV of /if ampli-
response, input and output impedances, speaker fiers. Six ranges -85 Kc to 30 Mc. Internal 400
resonance, speed of recording and playback cps modulation. Low rf signal leakage!
Hseuliegithce t-drpo efnorifcro rcmaopalopnrlci -cTeaV, t, iwobnildasec. k-b D-aaunnaddl -obwsahcnitidellow sTidcVto,h p ae(n 4d.i 5do etMhaelclyr, mOnelcyh $an9i8s.m50s,' twraitnhs iceanbt ler easnpdo ninses trauncdt iopnhass. e shift. Orf nalyn d$ o7f 9o.5u0tp ucto, minpslettreu ctwioitnh bsohoike. lded cable for
0.053 volts rms /in. and 1.5 Mc, 0.018 volts
rbmrast /eind. )g.r apInht esrcnreael nc. aIlnibcrluadtiensg svpoecltiaagl ed iraencdt /lcoawli-- WR -69A WR -70A
cap shielded probe and cable. TELEVISION /FM RF IF VF
Osunllay te$d2 3c9lip.5, 0i'n sctorumcptileotne bwooitkh. ground cable, In- a SWEEP GENERATOR MARKER ADDER
NSUEPWE! RW -P0 O-3R3AT ABLE rcSoiIfFrh w //a veimnfied nop/eevr eolfsw. cifdir2rte chqu tuoicte son 1nca3ty,ni n du rpaolounutsghs FteelrysoFro rM uea5 vbdl0ieslr jeucauKtsnsarcgthol a eonatb oi-ollci e8gt in85net0m og-q 1 e uM0ni18poct2 ,mf aMeTMTnncVVdct. wdthauevr ienrffgo a r smvigis nuadali ls itsao lridgtieonmmn oeddnuute la oeTbtrqotye o ud ba.iserp de imdmcuineesigilenva dter- mr w aoeEirtvkhlleeie mrrcWlsoitn Rraa aod-tf6niten9eisgAcr
OSCILLOSCOPE Only $295.00 with cables, instruction book. Only $74.50 with cables, instruction book.
WR -99A CRYSTAL -
A low -cost all- purpose There's an RCA test instrument to help e
swidcheoepareel -yofoonur l yc ain1n-4 cthaperor uy-h noadnmsy -e- MCAARLIKBERRA TGEDEN ERATOR ytoo us advoe eyvoeur yv ajoluba bbleet tetirm, ea. nAd ecoamsieprr e-ahennd-
abscnaoednmr vdpiwcuailinctdrgtta h- ss ooctfo na iblcehl adace nkq3d-ul "ea ip ngdmtrh -aeewpn hhtti.o t esu cgHrhaieg nehdjno .b cgsoa! ilnoR r -uTagVngd,e da wuadindidoe aligning and troubleshooTfctrionre ygqssu utecpanoplcl loyy r a -aTc rVfcf ,u uncbrdaalaarccrmyike er-a nnftoado-lrf smpirvaoerbk eleisnr se,a noTdfV t ceasisbt oleatascp.c se Ssesaeon rdiy eosbu:i arv siAd uestouh pompriluzieeltsdi ,-
Only $129.95' complete with low -cap direct input white TV, FM receivers and other electronic
probe, cable, power cord, cord -carrying brackets, equipment operating in 19 Mc to 260 Mc range. RCA Electronic Instrument Distributor for
instructions. (RCA Super - Portable Oscilloscope Only $242.50 complete with output cable, two complete information.
Kit, only $79.95'). phone tips, instruction book.
RCA Electron Tube Division, Harrison, N.J. 'User Price (Optional)
The Most Trusted Name in Electronics
Va_
RADIO CORPORATION OF AMERICA
2 ELECTRONICS V /CRLD
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oI'Id
E1('ClI'OIÌiCS
SEPTEMBER 1961/VOL. 66 NO. 3
CONTENTS
INDUSTRIAL
Automation (Editorial) W. A. Stocklin 6
Computers & The Semiconductors That Make Them Count D. S. Halacy 31
Cover Story 32
From TV Service to Industrial Electronics James T. Mendel 34
Is an experienced and capable TV service technician better off where he is. or .should
he try her a career in some other area of electronics? / /ere is one side of the argument.
Recent Developments in Electronics 42
Publisher
1 PHILLIP T. HEFFERNAN
TEST EQUIPMENT
Editor
WM. A. STOCKLIN, B. S. Transistor Frequency Standard Donald L. Stoner, W6TNS 8, Lester A. Earnshaw, ZLiAAX 36
Design of a one -transistor calibrator that generates WO-
hr, marks at frequencies up through 30 megacycles.
Teefurie -al Editor
MILTON S. SNITZER, W2QY1 Electrophoresis -Techniques, Applications, Maintenance John R. Collins 52
Electrical properties of complet molecules. like proteins found in firing tissues. per -
Service Editor toit .separation and identificatiorn. This facilitates blood analysis and other lob tests.
SIDNEY C. SILVER
HI -FI AND AUDIO
Associate Editor -
P. B. HOEFER New Audio Test Report (Eico ST40, Sonotone 9T, Dynaco FM -1) EW Lab Tested 18
Impedance Matching in Public- Address Systems
Editorial ( :onultant Part 1 Low -Z Loudspeaker Lines Mortimer S. Sumberg 38
OLIVER READ, D.Sc.,W4TWV
Tape Loops for Language Labs Raoul J. Fajardo 61
Industrial I. On stabled Selecting a Tape Machine Herman Burstein 62
WALTER H. BUCHSBAUM Record & Reel Revue Bert Whyte 71
Art Editor
GENERAL
MILTON BERWIN
Universal Time -Constant Chart Jim Kyle 37
Art and Drafting Dept. l .'iell nomogram for the tc,hni,ion who works with resistor -capacit- or circuits.
J. A. GOLANEK
Marine Electronic Service: Depth Sounders (Part 1) R. C. Roetger 44
Advertising Sales Manager New Horizontal Oscillator for TV Lothar Stern 57
LAWRENCE SPORN Domestic Replacements for Imported Transistors Jerry Eimbinder 58
Advertising Service Manager I list of Eurraotpheearn Naonmd Jatrpaannseissteo rt -ytpoe- str abnasssiest/t oorn c.soprerecilfaict iounp.-
ARDYS C. MORAN The "Banana" Color Tube Patrick Halliday 88
¡Irte,ils on it net( Mallard color TV display device.
fDqYs
COMMUNICATION-S
2
Transistors in Two -Way Radio
`sh/NG GO Part 2 Circuits Used in Commercial Equipment Edward M. Noll 47
A .- loua/ circuits used in commercial land -mobile two-way radio equipment.
ZEIFdFit o-DriAalV IaSn d PUExBeLcISutHivIeN GO fCficOeM PANY The "Simple- Talkie" Hartland B. Smith, W8VVD 50
One Park Avenue llund -held trans -receiver design for short -range talk -bark system.
NOeRwe goYno rk9 -7162,0 0N ew York Below the Broadcast Band Richard A. Genaille 54
/Exigu of low -frequency roui erter for Io to 5.30 Ix. range. R'brld -wide .submarine and ma-
J MIDWESTERN and CIRCULATION rine communications. aircraft beacons. weather and situe signals. may be heart/ on this band.
OFFICE
434 South Wabash Avenue
Chicago 5, Illinois MONTHLY FEATURES
Wabash 2.4911
Midwestern Advertising Manager
Gilbert J. Jorgenson Letters from Our Readers 10
WESTERN OFFICE Mac's Service Shop John T. Frye 60
9025 Wilshire Boulevard
Beverly Hills, California Service Industry News 82
CRestviee' 4-0265
Western Advertising Manager Electronic Crosswords Margaret LeFevre 92
Bud Dean
New Products and Literature for the Electronics Technician 108
FOREIGN ADVERTISING
REPRESENTATIVE (For Information on Next Month's Features, see page 4)
D. A. Goodall Ltd., London, England
September, 1961 3
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Announcing
the
Ultimate
IN
COMING
FM TUNERS
NEXT MONTH
NEW BATTERIES -PROGRESS OR CONFUSION TV MUSIC & THE BROADCAST
nCehwa raacltkerailsitnices - manadn gaapnpelsiec ataionnds soefa ltehde TECHNICIAN
The job and equipment of the technician
nichel cadmium batteries and how to who tapes the background music for net-
determine which of the many types cur-
rently available will do the best job in work television shows.
given equipment.
IMPEDANCE MATCHING IN P.A. SYSTEMS
The second article in this series for the
ION GENERATOR & ELECTROSTATIC audio technician covers the installation
AIR FILTER FOR THE HOME
I)e.sign and construction of a precipi- of more complex sound systems, involv-
tation filter- ionizer for installation in ing high -impedance speaker lines.
THE warm -air furnace. The unit cleans the
air and generates ions which some per- CIRCUIT DIAGRAMS OF MULTIPLEX ADAPTERS
sons feel are advantageous. We plan to include schematics and tech-
FISHER nical explanations on four or five com-
ELECTRO- MECHANICAL SWITCHING mercially available versions of multiplex
IN AUTOMATION adapters which are currently on the
iHnogw h mumultai-n p oospiteiorant osrwsi tcinh esp earrfeo rrempliancg- market or due to be released in the near
FM-1000 tasks that involve many steps in specific I utu re.
sequences.
TRANSISTORIZED CB CONVERTER
Details for building a two -transistor con-
FM- Multiplex LWOUhDiSleP EsApKeEaRk eTErsS TcINaGn &b eM tEeAsStUeRdE MoEbNjeTc tively verter for the car's broadcast radio that
and such tests are meaningful, these permits it to pick up Citizens Band sig-
Wide -Band Tuner measurements must be done properly nals.
and interpreted correctly. This article
tells how it is done. All these and many amore interesting and
Exclusive Stereo Beacon informative articles will be yours in the
PARALLEL -RESISTOR CHART October .i.s.su e of ELECTRONICS
A useful nomogram for electronics tech- WORLD on sale
The FISHER FMR -1 Broadcast Monitor and nicians and others who have to deal with
network relay tuner is now being made avail- parallel -R and series -C circuit problems. September 14th
able to the audio connoisseur seeking the
absolute ultimate in FM tuners. A magnifl-
cent,architectural -brass finish control panel
sets off this beautiful Instrument. It has the
remarkably high sensitivity of 1.5 micro- ZIFF -DAVIS PUBLISHING COMPANY
volts (IHFM) and its tunable front-end boasts
four tuned circuits -for a degree of sensi- William B. Ziff Michael Michaelson
tivity, and image and spurious response re- Chairman of the Board (1946 -1953) Vice President and Circulation Director
jection never before attained. An exceptional
tftheioean tu strtheaa titoI sn a SuTistEo RmbEraOota icdBacElaAlysC tOlinigNgh, ttsihn e a M Fsuisilgthinpealre l xiwn vhaeennnd- WiPlliraemsi dZenifft M. VTi.c eB iPrmreisnigdheanmt ,a nJdr. Business Manager
simultaneously switches the unit from
monophonic to stereo operation. $419.50 W. Bradford Briggs Richard Kislik
Walnut (20 -UW) and Mahogany (20 -UM) L verrrtire Vice President Treasurer
Cabinets for the FM -1000 $24.95
Hershel B. Sarbin Charles Housman
Vice President and General Manager Financial Vire President
USE THIS COUPON
Member
FISHER RADIO CORPORATION AuCdiitr cuBluarteioanus of .\ /Oe IIIGIi FIUI'.I.fl'P
LONG ISLAND CITY 1, N. Y. Oa LA4
Please rush FREE literature on the following: Net Paid Circulation 235,895
Specifications on FISHER FM -1000 Radio & TV News Radio News Radio- Electronic Engineering Trademarks Reg. U.S. Pat. Off.
Complete Catalogues on FISHER equipment Copyright 1961 by Ziff -Daub Publishing Company. All rights resarv.d.
Illustrated Custom Stereo Installation Guide tSroUnBicSsC RWIPoTrIlOd.N CSirEcRuVlaItCioEn, FDoerpmasr tm35e7n9t. a4n3d4 aSll osuuthb sWcraipbtaiosnh cAovrerneusep.o ndCehniccaeg os h5o.u ldIl linboe isa.d dPrelesasseed atlolo wEl eact-
least six weeks for change of address. Include your old address as well as new-enclosing if possible an
Name address label from a recent issue.
Address CtCriOobnNuttTriioRbnuIBsti UoTsnhIsOo uNwlSdil [l bCeb eo mnhtaariinlbedudlte odtro s w thaitrehe Nareedawvs isoYendoa rbklte o E cdraeitrtoear.i inab l uat O cftfhoicpisey amonafd g tahmzeiunirse t mabsaes nuaumcscceorsmip nptsoa narienedds poibllynu ssrietbrtialuittriyno nfpsoo.r s Cttahogenei-r.
safety. Any copy accepted is subject to whatever adaptations and revisions are necessary to meet the re-
quirements of this publication. Payment covers all author's. contributor's. and contestant's rights. title.
City State and interest in and to the material accepted and will be made at our current rates upon acceptance. All
photos and drawings will be considered as part of the materiel purchased.
4 ELECTRONICS WORLD
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ARE YOU "ON TARGET?"
Teat gounoelj
ANSWER THESE QUESTIONS:
DO YOU want to get into ELECTRONICS?
Do you have a SPECIFIC OBJECTIVE in mind
...Are you shooting at a particular target
(such as an FCC License)?
NOTE: The First Class Commercial FCC License
is a nationally recognized certification of elec
tronics knowledge ... PROOF of qualifications in
meeting U. S. Government requirements for cer-
tain jobs. Many companies which employ indus-
trial electronics technicians require them to have
this license. If you want a job in electronics, set
your sights on an FCC License as your No. 1
objective.
IN Do you want the kind of training that will take
you straight to this objective QUICKLY...
without wasting valuable time on non-
essentials?
Guido*
90 Tcaigiug san You? Grantham Schools' tuition rates are low, yet the instruc-
tional service is not equalled by many of the most
CHECK THESE FEATURES: expensive schools! Grantham can do this because of
highly efficient instructional methods and because
Grantham teaches the theory of electronics. Every basic Grantham has a sincere desire to out -do all others in
concept of electronics fundamentals is covered in the service rendered per tuition -dollar. Grantham has estab-
Grantham course ... whether you take it in resident lished reasonable tuition rates. And, the percentage of
classes or by home study. Grantham training "makes students who successfully complete the Grantham course
electronics yours." -and who get their FCC licenses -is one of the highest
You can get your First Class FCC license IN ONLY 12 in the nation.
WEEKS in Grantham resident classes (or, in a corres- EJYOU GAIN RESPECT by showing your Grantham
pondingly short time in the Grantham home -study diploma, once you earn it. YOU GAIN RESPECT b-y
program). THINK OF IT! A commercial U.S. Govern- showing and posting your First Class FCC License
ment license... PROOF OF YOUR qualifications in a nationally recognized certification of your electronics
meeting these U.S. Government requirements as an knowledge. Many companies which employ industrial
electronics communications technician ... a nationally electronics technicians require them to have this license.
recognized certificate. By preparing you for this license YOU CAN GET IT IN ONLY 12 WEEKS. Let
in only 12 WEEKS, Grantham conserves YOUR TIME! Grantham show you how!
flMature men select Grantham Schools for electronics
tt training. (The average age of Grantham Students is HERE'S PROOF: Here is a list of a few of our recent graduates, the
28.8 years.) MATURE MEN want a definite objective class of license they got, and how long it took them: License Weeks
(not a pot of gold at the end of the rainbow). Grantham Thomas Schutte, 736 Clinton, Hamilton, Ohio 1st 12
training has this specific objective: To prepare you for lWouilliisa mW . F.P aBverak,t to8n3,8 JPr.a, ge4 3S5 t., EtBnear kSeltereye t1, 0, RCusaslief.l l, Ky. 11Sstt 1126
your First Class FCC license and greater earning capa- Darrell E. Cloce, 25 E. 32nd St., Kansas City, Mo. 1st 12
bility. The Grantham Course is for mature men who PC.l auBd. eJ eFrrnaignaknlin, RWouhtiete ,2 , Jr.B, encs/oo n,R Nadoirot h StCa.a rWolJinMaA , Orange, Va. 11sstt 1122
know what they want. John M. MorgÌan , c/o KIRI -TV, 1530 Queen Anne Ave., Seattle, Wash. 1st 91
(Moil in envelope or poste on postal card)
Get your First Class Commercial F. C. C. License Quickly
by training at To: GRANTHAM SCHOOL OF ELECTRONICS
1505 N. Western 40$ Mar,on 3123 Gillham RA. 121.1951,, NW
HOLLYWOOD SEATTLE KANSAS CITY WASHINGTON
GRANTHAM
Please send me your free booklet telling how I con gel my com.
mrciol F.C.C. license quickly. I understand there is no obligation
and no salesman will coll.
SCHOOL OF ELECTRONICS
Name - Age
Address
1505 N. Western Are. 408 Marion Street 3123 Gillham Road 621 - 19th Street, N.W. City Slate I
H(Pohlloynweo:o dH O2 77,- 7C72a7lif). (PShoenaett:l e M4A, W2-7a2sh2.7 ) K(Pahnosnaes: CJEit y 19.6, 3M20o.) W(Pahsohnien:g tSoTn 36.3, 6D1.C4). II I am interested in: Home Study, Seattle classes II
MAIL COUPON NOW -NO SALESMAN WILL CALL- 11L [ , Hollywood classes, Kansas City classes, Washington classes 16 -P
September, 1961 5
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SERVICE MA51FR...
...
for the Record
EVERY TOOl YOU NEED
By W. A. STOCKLIN
99% Of THE TIME Editor
AUTOMATION
RELIABILITY is a theme that is considerable, it is not of primary im-
seems to be emphasized more and portance. The entire concept is based on
more in the electronics industry as time improving the reliability of the finished
goes on. One hears, for example, of one item. Theoretically, since the line has
failure in 60,000 hours of operation and just gone into operation, reliability can
although this is impressive, it actually be increased from one failure in 60,000
falls short of our future requirements. hours to one failure in 200,000 hours of
When we consider that the success or operation.
failure of a satellite launching can hinge After years of study, it has been found
on a 20 -cent resistor, the need for maxi- that most resistor failures can be at-
mum reliability from every one of the tributed to dust, dirt, or oil from th-e
complete 23-piece kit for radio, TV, thousands of components comprising fingers of production line workers
the package is self evident. deposited in the course of the manu-
and electronic service calls On a recent visit to Winston -Salem, facturing process. These inherent prob-
North Carolina we had the privilege of lems, along with the possibility of
inspecting a completely automated pro- human error in testing and checking
duction line. This 110 -foot line was de- performance, have heretofore restricted
2 HANDLES:
shockproof plastic. signed and is being operated by Western any meaningful increase in the relia-
Regular 4" length Electric Company. It is being used to bility ratio.
2 "Stubby.Inter- produce film strip carbon resistors for One of the most interesting perform-
changeable. Patented military applications. The production ance tests we witnessed was that
spring holds snap -in line is a highly coordinated system in designed to check each resistor for
tools firmly in place. which a digital computer calls all the leakage of its protective shell. The units
signals. Automated equipment deposits were immersed in a hot bath and any
9 NUTORIVERS:
a carbon coating on a ceramic core, leakage, indicated by air bubbles, was
High Nickel chrome
finish, to %" sputters on gold terminations, attaches detected by a photoelectric cell. Should
caps and leads, spirals the carbon to the resistor fail this leakage test, the
3 STUBBY value, encapsulates the resistor in a component was automatically discarded
NUTDRIVERS: protective shell, tests at three different by the machine.
y". 34". Ye" points for quality, marks appropriate Although the electronics industry is
EXTENSION BLADE: values on the resistor, and finally packs still in its infancy when it comes to
Adds 7 ". Fits the components for shipping. At no developing completely automated pro-
both handles. point in this entire process is a human duction equipment, there is no doubt
operator involved. Human error, poor that because of the increasing emphasis
3 STwCoR EsWloDttReIdV E.R..S : jbuedegnm eelnimt, ininaatettde ntaiso np, oasnsdib lfea ticgauues ehsa voef obne rdeleivaebliolipteyd, ottoh ehr aanudtloem aottehde rsli noesf wthilel
3(6". %2- defective components. hundreds of components which make up
II1 Phillips
While the cost of the finished product every piece of electronic equipment.
2 REAMERS:
s/ e- % ", t4 -%" THE "NE W LOOK"
ADJUSTABLE
WRENCH: AS we pointed out in last month's lace, but we dislike the idea of offering
6" thin pattern, editorial, starting with this issue less than complete coverage of a given
1" opening the ELECTRONICS WORLD logo on the subject and fewer articles per issue. We
LONG NOSE PLIER: cover has been changed. We believe that believe most readers would rather have
"Cushion Grip ", you will find the new upper and lower more and better material than larg-er
2'4" nose case type more readable and make the type -but since this is an experiment
magazine easier to spot -even at a we will appreciate any comments pro
DIAGONAL PUER: distance. We would also like to call your or con regarding this point.
"Cushion Grip"
attention to the changes on our Contents Basically, we plan no changes in the
hand -honed
cutting edges page. We have tried to make it more editorial policies of ELECTRONICS WORLD.
attractive, easier to read, and more We will still cover the same areas and
ROLL UP KIT: helpful by adding subheadings under the continue to bring you the same authori-
Durable, plastic - titles of some of the feature articles, tative material as we have during the
coated canvas. when space permits. This will help in past years.
Compact, easy - further clarifying the subject of the For those of you who may have
to- carry.
article instead of having to refer to missed last month's issue, we would like
Ask your distributor lo show you kit 99 SM the pages themselves for more detailed to mention again the fact that, starting
explanation. with the October issue, all of the EW
011031 We are also experimenting with vari- Lab Tested Reports involving hi -fi
ous type faces. (For those interested in equipment will be handled by the
the "mechanics" of publishing, we refer Hirsch -Houck Laboratories. Julian
you to pages 42, 52, 58, and 62.) Again, Hirsch and Gladden Houck will do the
our goal is to develop a presentation testing and, in our opinion, their facili-
that is not only attractive but easier to ties and knowledge of high -fidelity
XCELITE, INC. ORCHARD PARK, N.Y. read. Some readers may feel that the equipment cannot be topped. We hope
Canada: Charles W. Pointon, Ltd., Toronto, Ont. answer is to just go to a larger type our readers will agree. A
6 ELECTRONICS WORLD
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In ELECTRONIC COMPONENTS if it's news, expect it first from IRC
Installs behind surbases Lies under floor coverings Conceals easily behind wallpaper Saves drilling in walls and wood
Use POLYSTRIP ... the new, easier way
to make low- voltage interconnections
Users find POLYSTRIP a tine, money, with transparent plastics into a very
and headache -saver. The speed of thin, flexible, flat cable. Already proved
installing this flat cable results in in industrial electronics, it is now appli-
substantial savings. POLYSTRIP lies cable for hi -fi, paging, signalling and
under floor coverings without causing alarm systems, programming, wired
bulges; slips between wallboard seams, remote TV control.
behind moldings, through openings,
INSTALLER'S KIT SAVES 47%
thus eliminating drilling or cutting walls
and woodwork. It fastens to finished Assortment 3 205 saves 47',0 over the /
walls, ceilings and baseboards with separate prices of items it includes. --_.
double- backed tape, doing away with Contains 75 -foot rolls of both 3- and
conduit and plaster- cracking hardware. 5- conductor cable; 6 splicing and 2
The many features of this new concept wire lead type connectors* for both S- r4r
in cabling make POLYSTRIP equally and 5- conductor cable; 50 -foot roll of L
valuable for new construction or double- backed adhesive tape and
1
renovation. Stripping Tool.
,..,.
POLYSTRIP consists of uniformly International Resistance Company, 414
spaced flat copper conductors laminated North 13th Street, Philadelphia 8, Pa.
.POS -E -FLEX Connectors by The Thomas &
Bette Co., Inc., Elizabeth 1, N.J.
Leading supplier to manufacturers of electronic equipment
September, 1961 7
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INTERNATIONAL'S
xecutìve
NEW SERIES
for SUPERIOR Citizens band communication
MODEL 100 MODEL 10 MODEL 50
The ultimate in Executive Citizens International's exciting New Com- A precision engineered transceiv-
transceivers. Advanced features pact transceiver for the Citizens er featuring push -to -talk opera-
and design make the Model 100 licensee who desires quality tion. Three position crystal
an exceptional value. New crystal workmanship and engineering control transmit channel selector.
filter which minimizes adjacent plus the best possible circuit for Dual conversion superheterodyne
channel interference in the re- the money invested. Field tested receiver tuning all 23 channels.
ceiver. New built -in receiver cali- Full five watts plate input. Crisp
bration circuit. New International full 5 watt transmitter contained and clear modulation. Certified
NR squelch. New 12 position crys- in the higher price Executives. tolerance .005 %. Series Gated
tal control transmit channel se- Certified tolerance .005 %. Tun- automatic noise limiter. New In-
lector. New front panel micro- able superheterodyne receiver ternational NR squelch. Three
phone jack. New provision for way power supply for 6/12 vdc,
connecting external speaker and covering all 23 channels. Three and 115 vac. The Model 50 Execu-
S /meter. Dual conversion super- position crystal control transmit tive is a rugged yet handsome
heterodyne receiver. Push -to -talk channel selector. Manual trans- piece of communication gear
operation. Three way power sup- mit- receive control. Noise limiter. equally at home in the office,
ply for 6F12 vdc, and 115 vac. Available accessories include four service truck or field. Inside the
Handsomely packaged with new separate power supplies -6 vdc, Model 50 and every International
attractive control panel. Full five Executive you'll find the latest
watts plate input. Certified tol- 12 vdc, 24 vdc or 115 vac, push -to-
circuitry, careful craftsmanship
erance .005 %. Size 51/2" x 81/2" - talk relay kit, squelch kit, and 12 and quality components. Addi-
x 9" deep. Engineered to provide position transmit channel selec-
maximum operating efficiency. tional features of the Model 100
tor. Complete with transmit
Complete with transmit crystal, 1 Executive may be added at any
1 crystal, matching microphone
1 receive crystal, new style cer- time. Complete with 1 transmit
amic microphone and coil cord. and external speaker, but less crystal and matching microphone.
$199.50* power supply. $59.50* $149.50*
*Suggested Price
SEE THE EXECUTIVE SERIES AT YOUR AUTHORIZED INTERNATIONAL DEALER
INTERNATIONAL
CRYSTAL MANUFACTURING CO., INC.
18 NORTH LEE OKLAHOMA CITY, OKLAHOMA
8 ELECTRONICS WORLD
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