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108 Pages·2014·7.88 MB·English

HT POWE HIS L1QUI
. DCTOE ER NOVEMBER 75e
ocience WHfTE'S
RADIO
anal
LOG
ctrônics
E1e
AM Stztiols
MI ILM de S1
Pol c2'EnerEency
d
adio-111
pERIME
tterbug special
E's UNIVERSAL
RKROOM TIMER [:)
ontrols enlarger on time
locks any tray operation
US
BUDGET BUILD -ITS
I
7 -cent Hard -Rock Fuzz Box
n /Fe Moving -Vane Ammeter
erpetual- Motion Freq Standard
enny Pincher's Police Convertor
IS I_S_SU-E-
SKIES ABOVE US
E
E's roving report on what's what in outer spar-
Dazzle your friends with lightworks.
Sound n' Color Translators Strobe Lites
of eacIh ghbte afrto mof aXuednioon.
red.
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f-
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L1COCRAfT
C t.
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Be a technocrat with EICO solid -state test equipment
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TV
Ir
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helpful, easy -to -grasp that they approved
it for use in their own apprenticeship train- ICS, Scranton, Pa. 18515
ing program! Rush me tree information on TV Servicing! I under-
stand there is no obligation.
There are six detailed self- teaching texts
here, complete with illustrations and dia- Name (please print)
grams. So effective, so practical, that when Address
you have completed the first two texts you
City
should be able to locate and repair 70 per-
cent of all common TV troubles! Black and State Zip
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OCTOBER- NOVEMBER, 1969 3
October /November 1969
Science
and
c onlcs
¶Ele
SCIENCE SPECIALS
* -an
44 The Skies Above Us introduction to prowling the galaxies
46 San Onofre's Fabulous 450- Southern California's unique, nuclear -powered
generating station
CONSTRUCTION PROJECTS
* 35 Universal Darkroom Timer- an all- solid- state device that times prints and
negatives with great accuracy and no moving parts
*
41 Penny Pincher's Police Convertor -easy to build, low -cost convertor for
listening to fire and police calls
*
61 Sn /Fe Moving- Vane Ammeter- works on AC or DC
* 67 97 -Cent Hard -Rock Fuzz Box -add fuzz to your amplified guitar
* 79 Perpetual Motion Freq Standard -an electronic tuning fork
SCIENCE AND ELECTRONICS FEATURES
*
31 Light Powers This Liquid Semiconductor -experiment with the primitive
photoelectric cell
73 Tallest Tower- newest design in self- supporting towers
78 Famous Patents- Marconi's four- circuit tuning patent
COMM U N ICATIONS-SWL/CB/HAM
49 Their Time Is Your Time -standard time stations 'round the world
56 Saturday Morning Ham -In-s uburban Philadelphia hams at an early age
76 Ham Traffic-watch not, have not
LAB CHECKS
59 Heathkit Model IG -28 Color Bar and Dot Generator
65 EICO Cortina Model 3150 Integrated Stereo Amplifier
71 Univox- Super -Fuzz Guitar Fuzzbox
SCIENCE SHORTIES
30 The Precision Approach-. c-a rtoon page
40 Did You Know That . . keeping up to date on the latest happenings
60 Little Annie Fanny -broad view of computer drawing
82 TV's Long, Long Way to Tipperary
REGULAR DEPARTMENTS
8 Stamp Shack- phi-laatro nics
10 Positive Feedback word from the boss
12 Bookmark -tome touting
14 New Products -gadgets and gimmicks
18 Ask Me Another- readers' Q & A
24 Literature Library -yours for two bits
White's Radio Log, Vol. 51, Part 5 -page 83
Emergency Radio Services -Philadelphia Area -page 99
Cover illustration by Len Goldberg
..
Cover
r,.
Highlights
4 SCIENCE AND ELECTRONICS, formerly RADIO -TV EXPERIMENTER
wen
WM makes
simple
soldering

4
Model 450K4 3 in 1
Mod5e lp c1. 9k9Kit, All- Purpose soldering kit
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a1 nd heat sealing, 5 ft. solder, attractive X995 Handsome molded plastic carrying case.
heavy gauge metal case. Mfg. Sugg. List Mfg. Sugg. List
Model 75. For fast light work.
Model 250. 250 watt solder - Produces up to 100 watt heat.
inggun. Heats in 3 seconds. Mfg. Sugg. List $5.95
Mfg. Sugg. List $12.95
Model 222K5. Soldering kit, 2
Model 100K Kit tips, 2 heat ranges -25 -200 watts.
100 watts in 21/2 seconds Mfg. Sugg. List $11.95
Mfg. Sugg. List $7.95
WEN PRODUCTS, INC.
5808 NORTHWEST HIGHWAY, CHICAGO, ILLINOIS 60631 312/763/6060
INDUSTRIALLY LISTED FOR CONTINUOUS DUTY. 100% AMERICAN MADE
OCTOBER- NOVEMBER, 1969 5
Science
NEW AND IMPORTANT
and
SAMS BOOKS electronics
ALL -NEW EDITION OF THE FAMOUS
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aphuathsoer itoyf, thDer. sHuobwjeacrtd, Win.c lTudreinmga inaell . thFeu lllya tecsotv edrse veevloepry- Editor -in -Chief
ments, right down to the newest solid -state and Inte-
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ations of thousands of topics in the fields of acoustics,
recording, and reproduction. Virtually a complete refer- Managing Editor
ence library on the audio art in a single volume
Order 20675, only $29.95 CHARLES S. HARRIS
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Transistor Substitution Handbook. New 9th Ed.
Fully updated. Lists thousands of direct substitutions; HELEN PARKER, KQD7967
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Know Your VOM -VTVM. 2nd Ed. Art Editor and Associate Art Director
Explains VOM's, VTVM's and solid -state electronic
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cludes full explanations of the circuitry, uses, care ARTHUR S. COOKFAIR; ERNEST A. KEHR;
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Describes virtually every type of wire antenna; includes Contributing Editors
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Using and Understanding Unijunction Transistors IRVING BERNSTEIN, Cover Art Director
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RTL Cookbook
Explains the principles and use of RTL (Resistor -Tran- WILFRED M. BROWN, Instruments Division Manager
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SCIENCE AND ELECTRONICS and RADIO -TV EXPERIMENTER (Vol.
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Send FREE 1969 Sams Book Catalog PSiteredmeto, ntG rReda.t, NN.Ee.c; k,4 04N- .2Y3.,3 -6571269-; 48L7o -n3g3 05Is;l anSdo: uLthenw eOstseternn , a9d vGeratirsdinegn
representative: Jim Wright, 4 N. 8th. St., St. Louis, 314 -CH -1 -1965.
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L J Second class postage paid at New York, New York and at additional
moiling office. Copyright 1969 by Science and Mechanics Publishing Co.
6 SCIENCE AND ELECTRONICS, formerly RADIO -TV EXPERIMENTER
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edition. New items,
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EDMUND SCIENTIFIC CO BARRINGTON, NEW JERSEY 08007
OCTOBER- NOVEMBER, 1969 7
tively, appreciated the potentials of INTELSAT.
And almost as soon as its formation was an-
nounced, arrangements were made to link them-
selves into the American satellite program. They
created "Telespazio" exclusively for this pur-
pose under the aegis of the Italian Ministry of
Posts and Telecommunications.
By June, 1965, Telespazio was ready to make
use of the first Early Bird facilities. Equipment
which already is outmoded, was installed in a
brand new, specifically designed center at Fu-
cino, two miles from Avezzano, in Aquila Prov-
ince, and once an important source of water in
the days of Caesar and Claudius.
As early as October of that year, Italian
TV viewers witnessed the arrival and all -day
BY visit of Pope Paul VI to the UN, in New York
ERNEST A. via satellite.
KEHR
As this communications medium was de-
veloped, Telespazio kept. pace by acquiring and
The multi -color, 50 -lire stamp issued by installing the costly equipment as it came from
Italy on Nov. 25, 1968, is simply inscribed, the manufacturers here. And while the new
"Centro Telespaziale del Fucino." But the inter- antennae now are in operation, still more recent
continental communications progress it com- equipment already is in the process of being
memorates is vastly more impressive. It was built, including a more sophisticated antenna
released to mark the opening of expanded fa- that is 27.40 meters (90 feet) in diameter.
cilities built by the Italian Government to take
advantage of satellites for the intercontinental On Aug. 1, 1928, the Broadcasting Cor-
transmission and reception of private messages, poration of China was established in Nanking,
radio and TV programs. The design shows the to provide the populace with early radio news
Fucino installations, with one of two Space and entertainment programs. To mark the 40th
antennae, each about 30 feet in diameter, in the anniversary of that noteworthy event, the
foreground. Chinese Postal Administration released a pair
Once the United States and the Soviet of special postage stamps produced by the gov-
Union rocketed sophisticated hardware into ernment's engraving plant in Taipeh.
outer Space, and proved satellites could be kept The $1 value features a map of Asia with
orbiting under meticulous control from ground concentric circles spreading all over the main-
stations, this new communications technique was land from Formosa. All during World War II,
adapted to commercial use to serve mankind. BCC fostered morale of both the armed forces
In Washington, the initial efforts were cul-
minated by the organization of INTELSAT, in
February of 1965, to harness spacecraft po-
tentials on a private basis. The peculiar ability
of sending messages across vast distances not
only relieved pressure on overloaded cables be-
neath the seas; it enabled broadcasters to trans-
mit instantaneous news events in a manner
impossible through existing terrestrial equip-
ment.
ITALCABLE and RAI, Italy's two organizations
concerned with private and commercial message China (Taiwan) 1968 Postal 40th Anni.
transmission, and radio -TV productions respec-
and the populace; it linked government agents
in occupied areas, and conveyed China's voice
to allied nations. After it moved to Taiwan in
1949, its facilities are being used to transmit
programs to the mainland of China, to keep the
Chinese there constantly aware of what is hap-
pening on Formosa.
The $4 shows a small microphone from
which an interesting pattern of red circles and
Italy 1968 Fucino Installation (Continued on page 105)
SCIENCE AND ELECTRONICS, formerly RADIO -TV EXPERIMENTER
A REVOLUTIONARY NEW
The New 257
OUTFIT
Tests all modern tubes including
Novars, Nuvistors, Compactrons and Decals.
All Picture Tubes, Black and White
and Color
ANNOUNCING... for the first time
1 A complete TV Tube Testing Outfit designed specifi-
cally to test all TV tubes, color as well as standard.
Don't confuse the Model 257 picture tube accessory
components with mass produced "picture tube adap-
ters" designed to work in conjunction with all com-
petitive tube testers. The basic Model 257 circuit was
modified to work compatibly with our picture tube ac-
COMPLETE WITH ALL cessories and those components are not sold by us to
be used with other competitive tube testers or even
ADAPTERS AND ACCESSORIES, tube testers previously produced by us. They were
custom designed and produced to work specifically in
NO "EXTRAS" conjunction with the Model 257.
BLACK AND WHITE PICTURE TUBES:
STANDARD TUBES:
Single cable used for testing all Black and White Picture
Tests the new Novars, Nuvistors, 10 Pins, Magnovals, f/ Tubes with deflection angles 50 to 114 degrees.
Compactrons and Decals. The Model 257 tests all Black and White Picture Tubes
More than 2,500 tube listings. for emission, inter -element shorts and leakage.
Tests each section of multi- section tubes individually
for shorts, leakage and Cathode emission. COLOR PICTURE TUBES:
Ultra sensitive circuit will indicate leakage up to 5
Megohms. The Red, Green and Blue Color guns are tested individ-
Employs new improved 41/2" dual scale meter with a ually for cathode emission quality, and each gun is
unique sealed damping chamber to assure accurate, tested separately for shorts or leakage between control
vibration -less readings. grid, cathode and heater. Employment of a newly per-
yo Complete set of tube straighteners mounted on front fected dual socket cable enables acc$ompl4ishme7nts o f all
panel. tests in the shortest possible time.
SO
The Model 257 is housed in a handsome, sturdy, portable case. Comes complete with all
adapters and accessories, ready to plug in and use. No "extras" to buy. Only
NOTICE WTmueob deeh al Tv2ee5s 7te breesem npa lto pyarso dtieumvceein rygw dhreeasndi giont,h eimTreVp rwoavenerdem eerelneltac attirvnoedn lyiec v feteerwys t ttueebcqehusni piqmoune ent ht we es imnhcaaerv kee1 t9,l e3'a5w,r anwye dhb iceohfvo ermer eatahnne s u andwivneet enwrte ruroepf teTmVda. kpTirnhoeg-
duction period of 32 years. Accurate Instrument Co., Inc.
SEND NO MONEY WITH ORDER
PAY POSTMAN NOTHING ON DELIVERY
ACCURATE INSTRUMENT CO., INC.
Try it for 10 days before you buy. Dept. 671 2435 White Plains Road, Bronx, N. Y. 10467
Irfe mciot m$4p7le.t5e0ly p lussa tpisofisetadg ey oaun d hmaany- Pasnaledtai ssfheaa cntroudsrliyhn, g m I ec hmoaanryeg eMr.e ot(udIfre nl yo2fuo5 r7 .p craIef nfescrae tlliyasotfuiao cntm oaroyyf Ia ucsacego reuoenu tr. toE arseym iPt a$y4m7e.5n0t Ppllauns. ) poIfs tangoet
dling charge. (If you prefer you may
Name
use our Easy Payment Plan.) If not
Address
completely satisfied, return to us,
City Zone State
no explanation necessary. Sanadv e cMhaorngeeys!. CYhoeu cks thilel rer eatanidn ethnec lopseri v$il4e7g.e5 0o fw irteht utrhnisin gc ouapftoenr a1n0d dwaye wtriiall l pfoayr afull ll shreipfupnindg.
OCTOBER- NOVEMBER, 1969 9
POSITIVE FEEDBACK
Julian M. Sienkiewicz
Fill in coupon for a FREE One Year Subscrip- EDITOR -IN -CHIEF
tion to OLSON ELECTRONICS' Fantastic Value
Packed Catalog- Unheard of LOW, LOW PRICES
on Brand Name Speakers, Changers, Tubes,
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NAME old one and in larger type, too! Yep, we've
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CITY STATE go to bigger and better coverage of the exciting
GIVE ZIP CODE worlds of science and electronics. However, we
hIfis ynoaum eh avaen d a adfrdireensds ifnotre rea steFRdE Ei n sueblescctrriopntiiocns aslesnod. can't do the job alone. We need help from you!
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dress all your remarks to The Editor, SCIENCE
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MECHANICS
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Plot! Programming a computer requires
Science & Mechanics translation of word or picture directions into
the only magazine that
keeps you right up to a numerical language understood by the com,
date on developments puter's electronic circuits. Now, a new computer
in space technology, accessory simplifies this translation by making
weapons, automobiles, many programming tasks as easy as tracing lines
medicine, boats, planes, on a blueprint or photograph. The accessory, a
tools, new products, three -axis reversible scaler, was developed by
. . and exciting world The MicroMetric Corporation, Berkeley, Calif.,
events. a member of The Grass Valley Group, Inc.
Kofe eypo uurp htoom dea dtee. livMeareked scuorpey Designed for a wide range of industrial and sci-
by returning the coupon today. entific applications, the new scaler will free
programmers, now in short supply, from routine
S22C9IE NPCarEk &A veM. ESC.,H ANN. ICYS., N. Y. 10003 SE -969 production and laboratory work, allowing them
12 issues $4; 24 issues $8; 36 issues $12. (Foreign: to concentrate on more profitable assignments.
Add $1 a yeamr.) y- Programming a computer to control a ma-
Please enter year(s) subscription. chine tool, for example, can be accomplished
I enclose $ Bill me. (No stamps) merely by tracing a blueprint of the desired
NAdadmree ss (Please Print) pMaertt riwc itthw ot haex isp lo"tdtiignigti zcerro,"ss ash atihres ocof mab iMnaitciroon -
City- State & Zip of the new scaler and its plotting table is called.
(Continued on page 102)
10 SCIENCE AND ELECTRONICS, former'y RADIO -TV EXPERIMENTER