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Amplifier Design (Continued from page 154) For frequencies, above 23 Mc, 3rd order distortion was to be 32 db down at rated output; improving db for db to 8 db below rated output; and staying 40 db down for lower levels of output. These design objectives have been met. moo New SOLAR Step -Cap lead -thru capacitors speed assembly and cut costs Cupped ends are silvered, for direct soldering. Part numbers and /or coding furnished on request. SOLAR MANUFACTURING CORP. New York, N.Y . SALES OFFICES: 46th & Seville, Los Angeles 58. Calif. 4000 W. North Ave., Chicago 39, III. These units are the low- priced answer to lead -thru wiring. Soldering is direct to silver in each end. The ends are cupped, and serve as solder retainers, keeping solder from bridging the insulating gaps. Since center terminals are eliminated, the price is reduced. Fast handling and mounting. The simple contour of Step -Caps permits their use in automatic parts feeders. Units won't tilt when mounted because each is self- centering. A "step- type" shoulder holds each unit at the proper distance above ground, and makes jigging unnecessary. Silver is bonded homogeneously to the ceramic body to permit quick soldering to chassis in multiple units. Less space needed. The shoulder construction eliminates the need for eyelets. Hence these units can be mounted much closer together, leaving more room available on the chassis. Immediate deliveries in unlimited quantities. SOLAR lead -thru Step -Caps are furnished in capacity ranges from 3 to 275 mmf @ ±10% and ±20% tolerances; from 276 to 1000 mmf @ GMV. Units are rated at 600 VDCW. Mounting hole: .193 ". Can be supplied with center lead as a feed -thru type. Write for samples and details, or send us your requirements. "QUALITY ALWAYS" CERAMIC CAPACITORS PRINTED NETWORKS PIEZO CERAMICS Automatic Tuning Facilities The band spreading inherently afforded by the tank circuit, coupled with the precision of the vacuum variable capacitors and the circuit stability, make it easily adaptable to automatic tuning. Production amplifiers will include servo -motor drives for each of the amplifier tuning controls with an overriding clutch permitting manual adjustment of the controls in initial tune -up and in emergenoies. Compatibility with the automatic tuning facilities of the driving transmitter is obtained by essentially duplicating its servo control panel for use in the linear amplifier and interconnecting so that the driver and the amplifier can be controlled together from the amplifier location or remotely. The servo -amplifier panel will be housed in a 2 ft. wide cabinet. normally installed between the r -f and rectifier cubicles as shown in Fig. 4. The narrow cabinet also houses air ducting which permits entry and exhaust of cooling air either above or below the cabinet. The air system is of a high velocity, low volume type with capacity permitting operation on 50 cps power at altitudes up to 8000 ft. Conclusions Ingenious use of modern components has resulted in desirable simplification, reduction in size, and high performance in a high power linear amplifier for single sideband communications applications. These improvements have, in addition, made possible an appreciable reduction in the cost of improving and extending existing communications facilities. It is believed that further efforts in these directions are necessary to maintain the standards of reliability previously established by military and commercial high frequency fixed stations. 160 For product information, use inquiry card 011 pages 209 -210 Tele -Tech & ELECTRONIC INDUSTRIES June 1956
t c t SOARING OVER THE TECHNICAL BARRIERS ... F r n i q r l 1 ...IN SCATTER, RADAR AND PRECISION UHF WAVEGUIDE : pl:: °.:::: 1 ' Antenna Feed -Highest Gain Broad Band design for Scatter Communication -curves shown at the right developed by miniatur ized models measured in Reflectionless Chamber Laboratory. = R,.. wttttt1 Alii %i %i 740 .. 01 Radar Antennas, Pedestals and Servo Systems -large precision Parabolas, and Cosecant Reflectors with Control Systems manufactured to exacting Military Standards for Search, Air Surveillance and Meteorological Radar - All antenna designs Miniaturized prior to Prototype construction. SCATTER PARABOLA FEEDS s Waveguide- Lowest VSWR -UHF Waveguide. Exclusive General Bronze automatic welding process assures uniform production of large fabricated Waveguide and Waveguide Test Equipment. RADAR SYSTEMS UHF WAVEGUIDES SERVO MECHANISMS WR-2100 21" x 101" WR-1500 15" x 71" WR-1150 111" x 51" WR-975 91" x 41" r Ce; 84O Write Dept. K -for Complete Engineering Brochures IV GENERAL BRONZE CORPORATION 200 CENTRAL AVE., NEWARK 3, N. J. NEW YORK OFFICES -100 PARK AVENUE, NEW YORK 17, N. Y. - ELECTRONIC DIVISION _ Tele -Tech & ELECTRONIC INDUSTRIES June 1956 For product information, use inquiry card on pages 209 -210 161
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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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7Teecej 40m744- &we114 7le4va7atL I
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Design made easy with reliable RESI
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NOW...G-E SERIES -STRING SMALL TV P
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Type J dual control with line switc
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EXTENDED LIFE ELECTROLYTIC CAPACITO
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I RADARSCOPE Revealing important de
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Protecting and Packaging Electronic
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Design Of By J. E. WOODWARD, Sectio
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TI MM PULSE DELAY VT ULM PULSE WIDT
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Ì Fig. l: System installation plan
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o. -.4111111..._ '1.2 i OE BELOW FR
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Air -conditioned 28 ft. truck house
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i fGqfq 0/ 100 NOE TUBES5 NO.OF OF
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\- SECONDARY ELECTRONS GUN ENLARGED
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fin Air Cooling A By DR. M. MARK Fi
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. -. ' _ 220° 210° 200 190° 170
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I Vo AC MILLI- VOLTMETER The maximu
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Fig. 1: Linear and circular instrum
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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 124 and 125: New Tubes & Semiconductors SILICON
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 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
Page 174 and 175: Here it is -the 1&/udc« Dat& on SI
Page 176 and 177: _ PROJECT: QUALITY CONTROL TARGET:
Page 178 and 179: Um OALOHM... ntiltiatune gut nw. Yo
Page 180 and 181: 1 A. Finned Magnetron (Continued fr
Page 182 and 183: ASDE Radar (Continued from page 87)
Page 184 and 185: TWICE THE SPEED WITH DOUBLE LEAD SC
Page 186 and 187: for GUIDED MISSILES Encapsulated mu
Page 188 and 189: Regulation in less than '/so th cyc
Page 190 and 191: Color TV G/L/LI /L RADIO ® VACUUM
Page 192 and 193: What are YOUR paper tube reO requir
Page 194 and 195: F A Optical Radar EIMAC Vacuum Swit
Page 196 and 197: STANDARD True Hermetic Sealing assu
Page 198 and 199: Direction Finders (Continued from p
Page 200 and 201: 41611 DETERMINATION fleWiO//?pi of
Page 202 and 203: Direction Finders (Continued from p
Page 204 and 205: Here's the fastest way to produce f
Page 206 and 207: i Mobile Unit (Continued from page
Page 208 and 209: PROBLEM #3 Design a miniaturized 40
Page 210 and 211: 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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