10 months ago


Am perex® tubes are

Am perex® tubes are making music in the world's finest §F R ® systems .. . AMPEREX `preferred' tube types have proven themselves in the world's finest monophonic amplifiers. Now AMPEREX is paving the way with tubes for the world's finest Stereophonic systems. Developed in the research laboratories of Philips of the Netherlands, and applications- engineered by Amperex for the American electronics industry, these ultra- advanced tubes have proven their reliability and unique design advantages in late model amplifiers and tuners of the world's leading high fidelity manufacturers. Sold by franchised dealers everywhere... available for off -the -shelf deliveries in any quantity. Detailed data and applications engineering assistance available from Semiconductor and Special Purpose Tube Division, Amperex Electronic Corp., 230 Duffy Avenue, Hicksville, Long Island, N. Y. sti::ì Y/ç/gsiM[\V \\ gSssErriam Yaauiii ü. uEnAA V:AN // ask Amperex about hl -ri tub.. for hi -fl .t.reo circuitry POWER AMPLIFIER TYPES 6CA7 /EL34- Exceptionally linear, high -power out- put pentode with low -voltage drive requirements. Up to 100 watts in push -pull. (184/6805- Unique AF power pentode combining high gain and linearity with 9 -pin miniature construction. Up to 17 watts in push -pull. E1.86/6CW5 -Low voltage, high current version of the type E184/6805. Up to 20 watts in push -pull. ECL82 /6ßM1- Triode -pentode. Up to 8 watts in push -pull. UCL12 /50BMB- Series string (100 ma. 50v) version of ECL82 /6BM8. PCL$2 /16A11- Series string (300 ma. 16v) version of ECL82 /613M8. VOLTAGE AMPLIFIER TYPES EF86 /6267- High -gain pentode with exceptionally noise and microphonics. Replaces the 12AU7 with - low hum, noise and microphonics.. Particularly out circuit changes. suitable for pre -amplifier and input stages. Similar to the Z739 and the 5879. ECC81 /12AT7- Medium -gain dual triode with low hum, noise and microphonics. Replaces the 12AT7 without circuit changes. ECCe2 /12A1.17- Low -gain dual triode with low hum, RF AMPLIFIER TYPES ECC13 /12017- High -gain dual triode with low hum, noise and microphonics. Replaces the 12AX7 without circuit changes. ECFBO /BOER- High -gain triode - pentode with low hum, noise and microphonics. 6011 /ECC8B-Frame grid, sharp cut -off twin triode. and low noise. Particularly suitable for cascode circuits, RF & IF amplifiers, mixer & phase inverter stages. Fea- jECC8S /6Á11 -High gain dual triode for FM tuners with shield between sections for reducing osciltures high transconductance and low noise. lator radiation. ' PUB-Similar to 6018 /ECC88. Has remote cut -off EDF$9 characteristics. /6D0-Duo diode -pentode with remote cutoff characteristics. Suitable for RF & IF amplifiers. 6ER5 -Frame grid shielded triode with remote cutoff characteristics. Suitable for RF amplifiers in ECF10 /681.8-High gain triode -pentode for RF am- TV & FM tuners. Features high transconductance plifiers. RECTIFIER TYPES EZ80 /6V4- Indirectly heated, full -wave rectifier 6Z34 /5ÁR4- Indirectly heated, full -wave rectifier with 6.3 v, 0.6 amp. heater, 90 ma. output caw with 5 v, 1.9 amp heater and 250 ma. output ity and 9 -pin miniature construction. capacity. Octal base. Replaces the 5U4G without EZ111 /BAC4 - Indirectly heated, full -wave rectifier circuit changes with the advantage of lower with 6.3 v, 1 amp heater, 150 ma. output capacity tube voltage drop because of the unipotential and 9 -pin miniature construction. cathode. Also Available: INDICATOR TUBE EM84 /6F68 -Indicating pattern is a varying length DM70 /1M3- Subminiature type with "exclamation bar. For use in broadcast receivers and tape mark" indicating pattern. Features low filament recorders. consumption (25 ma.). GERMANIUM DIODES 1N542- Matched pair. Replaces 6AL5 In FM de- 1N87Á -High RF rectification efficiency diode. Suit - tector circuits. able for AM detector circuits. .300, 450 & 600 ma series string versions available. t300, 130 & 100 ma series string versions available.

. ator. i YOU BUILD Vacuum Tube Voltmeter earn extra ca>h fixing neighbors. sets in spare t ime. gain knowledge to help you work Radio, Television, ('obor T \'. Wit ILI. training you work on circuits common to both Radio and TV. Equipment you build "brings to life" things ill learn in N.R.1.'s easy- to- under- .i lessons. 64 page catalog FREE, ..s all e 111IIMeut you get. r YOU BUILD T YOU BUILD - Broadcasting Signal Transmitter Generator tse- ;.1. Communicainn.. t 1,1,f .vou build this low power Transmitter; use it to learn methods required of commercial broadcasting operators. train for FC(' license. :. R.I. sends kits of parts build this Signal Gen- You get practical Irerience, conduct tests to rnpensate Radio frequency amplifiers, ractice aligning a typical I.F. video amplit i r in TV circuit. many other experiments. YOU BUILD AC -DC Superhet Receiver t, I. a training supplies all parts, everything is yours to keep. Nothing takes the place of practical experience. You get actual servicing experience by practicing with this modern receiver; you learn -by- doing. 1 I 1 I ri I WHAT GRADUATES DO AND SAY Chief Engineer "1 am Chief Engineer of Station KGCU in Mandan. N. D. 1 also have my own spare time business servicing high I rqueney two- tvay(ommunications systems." R. BARNETT, Bismarck. North Dakota. Paid for Instruments "I am doing very well in spare finie TV and Radio. Sometimes have three TV jobs waiting and also fix ear Radios for garages. I paid for instruments Out of earnings." G. E. SEAMAN, New York, N. Y. Has Own TV Business "We have an appliance store with our Radio and TV servicing, and get TV repairs. During my Army service. NR! training helped get me a top rated job." W. M. WEIDN ER, Fairfax, South Dakota. NEED FOR TECHNICIANS INCREASING Fast Growing Field Offers Good Pay, Bright Future l'rday's OPPORTUNITY field is Radio- Televiion. Over 125 million home Radios plus 30 Ilion sets in cars and 40.000.000 Television its mean big money for trained Radio -TV 'technicians. More than 4,000 Radio and TV Broadcasting stations offer interesting and imp, wtant positions for technicians, operators. Color television, portable TV sets, Hi -Fi, other developments assure future growth. It's the trained man who gets ahead. The fellow who uses his spare time to develop knowledge and skill gets the better ,job, drives a better cam. live:, in a better home, is respect cd l', r tchat h, Send for LESSON and CATALOG FREE VETERANS Available under G.I. Bills Job ana Cateet Oppetlenitues lot ith1 0 -TV TECHNICIANS and can [lo. So plan now to get into Radio -TV. Keep your job while training with N.R.I. You learn at home in your spare time. N.R.I. is oldest and largest home study Radio -TV School. Our methods have proved successful for more than 40 years, provide practical experience. Soon after enrolling, many N. R.I. students start to earn $10, $15 a week extra in spare time fixing sets. Many open their own full time Radio -TV shops after getting N.R.I. Diploma. Find out more. Mail Coupon. Cost is low, terms east': includes all equipment. Address: National Radiolnstitute,Dept. 9EE, Washington 16, D. C. NATIONAL RADIO INSTITUTE Dept. 9EE, Washington 16, D. C. Mail me Sample Lesson and 64 -Page Catalog. FREE. (No Salesman will call. Please write plainly. Name_ Address Age_ City Zone- -State ACCREDITED MEMBER, NATIONAL HOME STUDY COUNCIJ ELECTRONICS WORLD I. earhhhrrl monthly IH ZiR:1:aI. 1ulli.hl,R Company. a al:, 1+^Inl:a al Chicago, lllinuiy. Autlin-ISau hr l'u.l (llllra nalarlmrnl. ellluia l"., :,I. n. ...I...1,14,, 1114 .111 ,. I 1., I : 1 1 SUBSCRIPTION RATES: one >a.rr U. S a,. I -"' . S4.1lu: Pao Uniurr l,.urrir. :,11 . :es May. 1959 3

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