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New Tubes & Semiconductors SILICON DIODES Eight new bonded silicon diodes with peak inverse voltage ratings from 15 v. to 225 v. has been announced. Types 1N300A, 1N301A, 1N302A, 1N303A, 1N432A, 1N433A, 1N434Á, and 1N460A TWIN -TRIODES A 9 -pin miniature tube, the 6BS8, has higher gain, lower noise and a 20 percent lower dissipation factor resulting in extended operating life. 6BS8 replaces the 6BZ7 or 6BQ7 -A, and will DOUBLE- TRIODE TUBE The 12AD7 double triode, a 9 -pin miniature tube, fills the need for a low - hum preamplifier in audio applications. Established tube ratings of the 12AD7 assure an extremely low hum level- are similar to units not designated "A" but have higher forward current ratings with no increase in reverse current. All types operate at ambient temperatures from -55 °C to +150 °C with excellent stability and low reverse current. Every diode receives four temperature cycles of one hour at -55°C and one hour at +150 °C, followed by 35 hours at 95% relative humidity and 70 °C. Technical Information Service, Raytheon Manufacturing Co., 55 Chapel St., Newton 58, Mass. TELE -TECH & ELECTRONIC INDUS- TRIES (Ask for 4 -9) TW AMPLIFIER This traveling wave tube features broadband operation from 1 to 2 kilo - megacycles without the necessity of making any electrical or mechanical adjustments. It finds its greatest use where this broadband characteristic can be utilized. Grid. control is provided for variable gain and power output applications. Approx. operating characteristics over this band are 30 db gain provide a high -cascode transconductance to plate- current ratio. The 4BS8 for series string applications has the same advantages as the 6BS8. Typical cascode conditions and tube characteristics are: Plate Supply Voltage 250 v.; Grid Voltage 1 v.; Plate Current 16 ma; Grid Voltage for Gm -50 umhos (approx.) 6 v.; Transconductance 10,000 umhos. Tubes are factory tested under operating cascode conditions. Westinghouse Electronic Tube Div., Dept. T -215, P. O. Box 284, Elmira, N. Y. TELE -TECH & ELECTRONIC IN- DUSTRIES (Ask for 4 -15) THERMISTOR KIT A new "see- easy" kit with 12 standard thermistors in a plastic compartment case for reference by engineers and designers is provided with spec. sheets covering dimensions, electrical characteristics, and temperature -resistance relationships of the rod -type thermistors. Thermistor applications in electrical and electronic sensing, controlling, and indicating devices are cataloged. The 12 units cover resistance less than 3.0 milliv. rms on the plate of each triode when the tube is operated in a typical resistance coupled amplifier circuit. This has been achieved by design features that include a reverse coil heater which helps cancel magnetic coupling. Factory- testing to meet low hum specifications, provides a guarantee that the new tube will meet a min. hum capability, regardless of manufacturer. Sylvania Electric Products Inc., 1740 B'way, New York 19, N. Y. TELE -TECH & ELECTRONIC IN- DUSTRIES (Ask for 4 -23) JUNCTION TRANSISTORS Germanium Products Corp. has begun large -scale production of a complete line of precision durable silicon grown junction transistors. The new transistors are currently available in two categories, one with emitter voltage of two volts and the other, the "A" category with emitter voltage of five volts. Four types of transistor in each series cover a wide range of special operating requirements. Size compares with a min- 3t and 10 milliwatts output. The unit requires a 300 gauss field and a 250 v. regulated power supply. Huggins Labs., Inc., 711 Hamilton Ave., Menlo Park, Calif. ranges from 25 ohms to 1 Meg. Kit is priced at $14.75, plus postage. Friez Instrument Div. of Bendix Aviation Corp., Baltimore, Md. TELE -TECH & ELEC- TRONIC INDUSTRIES (Ask for 4 -53) iature electron tube of a comparable rating. Bogue Electric Manufacturing Co., 52 Iowa Ave., Paterson 3, N. J. TELE -TECH & ELECTRONIC IN- DUSTRIES (Ask for 4 -10) 122 Tele -Tech & ELECTRONIC INDUSTRIES June 1956
This is one of the best -known symbols of our time...and precision stampings have helped make it so. A complete electronic- stamping service means more than just designing... ...it means more than just building the necessary dies... ...it means more than just producing the specified parts. It means working with electronics industry people day in and day out... ...to develop stampings that will improve their products... ...and stampings that will reduce their manufacturing costs. 111/111/2 It is this "plus" quality that makes Volkert stand out. VO LK E RT STAMPINGS, INC. 222 -34 96th Avenue, Queens Village 29, New York Tele -Tech & ELECTRONIC INDUSTRIES June 1956 For product information, use inquiry card on pages 209 -210. 123
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TELE-TECH & ELECTRONIC INDUSTRIES S
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-1081 One of the Publications Owned
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Facts and Figures Round -Up June, 1
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PROGRESS either of two other 50 -oh
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testing components with Burroughs p
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REPRESENTATIVES Mr. Bertram D. Aaro
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m perex all -glass GERMANIUM DIODES
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Electronics Around the World Contin
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2=====l: As We Go To Press... saam
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As We Go To Press .. . (Continued)
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. FIXED Composition RESISTORS In al
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As We Go To Press .. . (Continued)
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As We Go To Press (Continued) Airbo
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Atl\Iri Get on the a,Pr , rrlr^ì .
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MIT Offers Summer Program on Modern
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CAMERA PICK -UP TUBES FROM WESTINGH
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32 For product information, use inq
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1 CHOOSE YOUR 20 SERVO These high p
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Type ML-6A. This unit is identical
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i ru nSitron SILICON RECTIFIERS MIL
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Get an on- the -job demonstration o
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BON OFFERS MO HYPES OF 1% Here's 1%
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.... f HEREIT1F! A NEW Plug -In Tri
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Etched cathode FP plate for 85°C s
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-4-- 11 ---)(-- 11" copv.,A 41za--
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EIM 170 AC X600 Klystron covers -24
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NEW Size 8 servo combination rivals
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IF YOU USE COILS like these toroids
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UNION U Miniature Relays with the t
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Sqr2Jiex Coaxial Cal lé IS GOING P
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Precision Frequency Source... ULTRA
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BOOKS I PmenU Pending YLON CO /L FO
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WESTINGHOUSE 2 -AMP GERMANIUM POWER
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çStiiijh1hlw PRODUCTS 1-3 / "Co lo
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kes Tarzian R E C T I F E R S Selen
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B.F.Goodrich For duplicating free s
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Page 76 and 77: Design made easy with reliable RESI
Page 78 and 79: NOW...G-E SERIES -STRING SMALL TV P
Page 80 and 81: Type J dual control with line switc
Page 82 and 83: EXTENDED LIFE ELECTROLYTIC CAPACITO
Page 84 and 85: I RADARSCOPE Revealing important de
Page 86 and 87: Protecting and Packaging Electronic
Page 88 and 89: Design Of By J. E. WOODWARD, Sectio
Page 90 and 91: TI MM PULSE DELAY VT ULM PULSE WIDT
Page 92 and 93: Ì Fig. l: System installation plan
Page 94 and 95: o. -.4111111..._ '1.2 i OE BELOW FR
Page 96 and 97: Air -conditioned 28 ft. truck house
Page 98 and 99: i fGqfq 0/ 100 NOE TUBES5 NO.OF OF
Page 100 and 101: \- SECONDARY ELECTRONS GUN ENLARGED
Page 102 and 103: fin Air Cooling A By DR. M. MARK Fi
Page 104 and 105: . -. ' _ 220° 210° 200 190° 170
Page 106 and 107: I Vo AC MILLI- VOLTMETER The maximu
Page 108 and 109: Fig. 1: Linear and circular instrum
Page 110 and 111: CONTROL VOLTAGE SI BAND SWITCH Inge
Page 112 and 113: MIRROR MOTOR , SCREEN TARGET SPOTS
Page 114 and 115: CUES for BROADCASTERS Practical way
Page 116 and 117: , Designed with the future 0 ° S C
Page 118 and 119: REOy NGLER Beamed at the Greatest R
Page 120 and 121: New Technical Products BATTERY CLIP
Page 122 and 123: New Technical Products S -BAND LOAD
Page 126 and 127: New Avionic Products TELEMETRY RECE
Page 128 and 129: New Broadcast Equipment AMPLIFI ERS
Page 130 and 131: 1/2 actual size ji HUGHES TRANSISTO
Page 132 and 133: 'ono/ ELECTRONIC SOURCES Investigat
Page 134 and 135: International ELECTRONIC SOURCES Pr
Page 136 and 137: permeability is defined. Temperatur
Page 138 and 139: International ELECTRONIC SOURCES Th
Page 140 and 141: International ELECTRONIC SOURCES re
Page 142 and 143: nal ELECTRONIC SOUR ES the emission
Page 144 and 145: HERE ARE THE FACTS ABOUT TV MICROWA
Page 146 and 147: WASHINGTON eetem Latest Radio and C
Page 148 and 149: the portable recorder you specified
Page 150 and 151: ELECTRONIC Test Instruments 9 TUBE
Page 152 and 153: cnor MAN "XC" Plastic Film Dielectr
Page 154 and 155: IS RIGHT "NEXT DOOR" IN TERMS OF SE
Page 156 and 157: WIDE -BAND POWER OSCILLATOR 200 to
Page 158 and 159: NEW FROM ASCOP LOW LEVEL PW MULTICO
Page 160 and 161: ffi NEW Printed Circuit Precision R
Page 162 and 163: Amplifier Design (Continued from pa
Page 164 and 165: HE PROVED IT FOR HIMSELF! The new P
Page 166 and 167: Albert Lazoni recently joined the D
Page 168 and 169: 1 1 DATA SOURCES Bil meti tsatäìr
Page 170 and 171: Be sure of dependable electrical pr
Page 172 and 173: DON'T DERATE DELIVERY DATES FOR CLO
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Here it is -the 1&/udc« Dat& on SI
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_ PROJECT: QUALITY CONTROL TARGET:
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Um OALOHM... ntiltiatune gut nw. Yo
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1 A. Finned Magnetron (Continued fr
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ASDE Radar (Continued from page 87)
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TWICE THE SPEED WITH DOUBLE LEAD SC
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for GUIDED MISSILES Encapsulated mu
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Regulation in less than '/so th cyc
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Color TV G/L/LI /L RADIO ® VACUUM
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What are YOUR paper tube reO requir
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F A Optical Radar EIMAC Vacuum Swit
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STANDARD True Hermetic Sealing assu
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Direction Finders (Continued from p
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41611 DETERMINATION fleWiO//?pi of
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Direction Finders (Continued from p
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Here's the fastest way to produce f
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i Mobile Unit (Continued from page
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PROBLEM #3 Design a miniaturized 40
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FREED OFFERS FOR IMMEDIATE DELIVERY
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PRODUCT INFORMATION? Use the cards
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It would take over 500 listings in
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Product Section & Code No. Cable, o
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Product Section & Code No. Meters,
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1956 ELECTRONIC INDUSTRIES DIRECTOR
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2- AMPLIFIERS, RF -IF Amplifiers, a
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General Riveters Inc Electro Mechan
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Coleman Instruments 318 Madison St
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Superex Electronics Corp 4 Radford
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Mattson Electronics Corp 1487 Linco
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Instrument Labs 315 W Walton PI Chi
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11- CAPACITORS, Fixed Capacitors, a
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Chicago Tool & Eng'g Co 8383 S Chic
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Mount Sopris Instrument Corp 1320 P
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Daystrom Pacific Corp 3030 Nebraska
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Hudson Associates 50 Drumm St San F
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Tech Labs Inc Bergen & Edsall Blvd
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20- CONTROL EQUIPMENT, COMMUNICATIO
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Gyro Electronics Oo 325 Canal St Ne
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Fretco Inc 406 N Craig St Pittsburg
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Austin O Div of Decalmakers 225 Fla
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26- HEADPHONES Headphones, crystal
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Rust Industrial Co 41 E 42 St New Y
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Acme Wire Co 1250 Dixwell Ave New H
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Eberline Instrument Div Reynolds El
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Sonex Inc 245 Sansom St Upper Darby
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Synchroscopes 43 Thermocouples 44 T
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Librascope Inc 808 Western Ave Glen
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Sensitive Research Instrument Corp
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New London Instrument Co 82 Union S
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44- MICROPHONE ACCESSORIES Micropho
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Continental Electronics 302 Oakland
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Dalmo Victor Co Div Textron America
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Electronic Specialty Co 5121 San Fe
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Morrow Radio Mfg Co 2794 Market St
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Valpey Crystal Corp Holliston Mass
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Olympic Radio & TV Inc 34-01 38 Ave
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Raytheon Mfg Co Equip Marketing Div
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59- RECORDING ACCESSORIES Discs, bl
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Delco Radio Div General Motors 700
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Sage Electronics Corp 302 N Goodman
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65 -SOUND REPRODUCING EQUIPMENT, MA
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Jensen Mfg Co 6601 S Laramie Ave Ch
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Racks equipment 30 Racks, film stor
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Aerovox Corp & Divisions 740 Bellev
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Electronic Products Co 111 E 3 St M
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Midwest Electric Products Mankato M
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Hertner Electric Co 12690 Elmwood A
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Linde Air Products Co Div Union Car
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Guardian Electric Mfg Co 1621 W Wal
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Cranephone -Femco Inc. Crest Lab -M
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BRAND and TRADE NAME INDEX Polyken-
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CONSULTING ENGINEERS ELECTRONIC IND
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DISTRIBUTORS SERVING the ELECTRONIC
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REPRESENTATIVES ( "REPS ") ELECTRON
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REPRESENTATIVES ( "REPS'') DAN GREE
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REPRESENTATIVES ( "REPS") *Brauer &
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1 -7770 -5067 -4692 ALPHABETICAL LI
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-1677 -2291 -5127 -2626 ALPHABETICA
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-3130 Williams ALPHABETICAL LISTING
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-7765 1 -6174 ALPHABETICAL LISTING
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ALPHABETICAL LISTING of MANUFACTURE
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-1060 ALPHABETICAL LISTING of MANUF
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-2700 -8454 -C I-Leo ALPHABETICAL L
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000 Directory -Localizer Index Unit
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THE H. CROSS CO. ROLLING TECHNIQUE
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BIRNBACH can supply ... Single -Gun
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high 0 MICROWAVE SPECIFICATION IS I
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WE MAKE THE KIND OF TRANSFORMERS YO
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ä EXTENDED FREQUENCY RANGE with th
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plastic molding INJECTION 20 machin
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Nom! A LOW COST BRIGHT RHODIUM PLAT
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PRECISION ENGRAVING on Metal- Plast
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1199 IRE (LOT d IMAM pIEt ..e.. u..
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IMPEDANCE COMPARATOR FOR LABORATORY
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ADVERTISERS in JUNE Tele -Tech ACME
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ELECTRICAL WIRING DEVICES Designed
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RCA Field Enginee RCA Application E
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