Tube data vintage info from the age of vacuum tubes. Manufactures, tube markings, and years of manufacture are supplied for a great many tubes of this era. I always enjoy reading what richard has to say about vacuum tubes, and i. A vacuum tube, an electron tube, valve british usage or tube north america, is a device that. The receiving tube manual published in late 1920s had all the early. I could also see this tube to work well in a headphone amplifier or as driver for other small power triodes, like the 71a or even the 45. It is a long page, use your scroll button and scroll down the page to see it all. At the materials research laboratory investigations are examining the atomic structure of a ial by means of an ray diffraction apparatus. The regulation gost 546159 applies to tubes manufactured from 1959 and semiconductors manufactured from 1959 to 1963. Mike, thanks again for keeping the audio vacuum tube market alive and well. The first electronic amplification of sound was done with vacuum tubes. Vacuum tube 71a, triode, st glass antique electronic supply.
To search for tube data, simple click the search link on the left. These are all antique and collectable tube types, primarily two digit varieties. Nos examples of the globe and st versions of this tube are still fairly plentiful, sometimes in their original cartons, and sound very good. Try searching the tube data sheet locator, the worlds biggest index of tube datasheets. The typical vacuum tube will consist of two or more electrodes. Materials and techniques for electron tubes by walther h. Vacuum tubes were critical to the development of electronic technology, which drove the expansion and commercialization of radio broadcasting, television, radar, sound reinforcement, sound recording and reproduction, large telephone networks, analog and digital computers, and industrial process control. Tube 01a or rohre 01a id3654, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and universal shown. They were usually specialquality versions of standard types. This technical data book has been compiled for the use of the radio industry.
If an element is absent, a dash should be written at its place. The other early numbers in this series 202 through 209 were transmitting tubes of rca or western electric, and the two digit designations between 2 and 10 were never applied to receiving tubes although 1 through 9 were philco. A vacuum tube is an electronic device that controls electrons in an airtight enclosed area free of oxygen or any other gas. The type 71a vacuum tube was a power amplifier triode intended for use in the final audio stage of battery or alternating currentoperated receivers. Listed under the technical reference vacuum tube category that is about vacuum tube resources. This is thomas mayers blog about vacuum tube audio, to share. Sylvania 71a coke bottle amplifier radio vacuum tube. Such tubes are also often referred to as battery tubes. Hf means heater or filament voltage and current specifications.
Tube 71a or rohre 71a id3600, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and poweroutput shown. Us military standard test methods for electron tubes, the famous milstd11b. The 71a is a poweramplifier tube of lowoutput impedance for use in the output stage of audiofrequency amplifiers. Nos tube specification sheet nos tube specification sheet.
In a power amplifier, this heating can be considerable and can destroy the tube if driven beyond its safe limits. Richard wugang tells us about the history of the 45 vacuum tube. Vacuum tube 183 483, triode, power amplifier antique. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. The 1943, 1949 and 1959 sylvania tube manuals online. These newoldstock vacuum tube specifications are provided as informational only, and in no way guarantee the brand or exact functionality of the vacuum tube you receive. Transmitting tubes rectifiers specialpurpose diodes. Vacuum tube, vintage radio and other electronics information. Vacuum tube numbers were not standardized until the early 30s. Tube ux 171a or rohre ux171a id3833, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and poweroutput shown. The 45, 50 and 71a tubes generally come in two bottle styles, the globe which looks kind of like an incandescent light bulb in shape and the st shape which has a more coke bottle shape to the glass bottle. Vacuum tube 71a, triode, st glass filament type power amplifier having low plate. According to the data sheets, a single 6146b operating in class ab2 i.
Free vacuum tube data sheets free vacuum tube substitution. The vacuum tubes come in a variety of styles and models. The 30 will replace 01a, x99, wx12 and most other amplifier tubes which have 4d basing. Data from or other sources as supplied by john atwood. Welcome to the tube data sheet locator, a popular web resource for finding data on vacuum tubes. Tube ux 210 or rohre ux210 id3966, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and poweroutput shown. This book would be an execlent resource for those who collect early vacuum tubes from the earliest tubes through 1930. Ceramic 4 pin vacuum tube sockets for 2a3 10 45 71a 80 300b gold plated new. Bill beechs online tube data from mostly rca manuals. Type 71a philco power amplifier tube vintage tested. This electric process allows the free flow of electrons inside the tube. You may have wondered why there are gaps in the numerical listing of tube numbers between 1 and 100. Tube ac 2hl or rohre ac2hl id721, triode, vacuum, europe 5pin, b5 eu o, f, o5a 1928 and audio frequency shown. Vacuum tube 12dw7 ecc832, jj electronics, dual triode in the 12dw7ecc832, section 1 of the tube pins 6, 7, and 8 is the high gain 12ax7ecc83 spec gain factor 100 and section 2 pins 1, 2, and 3 is the low gain 12au7ecc82 spec gain factor 17.
To find out how much power is needed by the 6146b, we can refer to the to the 6146b data sheet available on my 6146b amplifier pages, the 6146b tube data sheets available online at franks electron tube pages, or the rca tt5 transmitting tube manual. As far as i know, the only published data for the type 1 is in the suppliment to rcas receiving tube manual r10. This is done in case of equal tube type numbers for different tubes. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. Dec, 2002 the type 71a vacuum tube was a power amplifier triode intended for use in the final audio stage of battery or alternating currentoperated receivers. An a suffix on tube number indicated an improvement over the previous version, either version will work.
The 71a is a power amplifier tube of low output impedance for use in the. Vacuum tubes which had special qualities of some sort, very often longlife designs, particularly for computer and telecommunications use, had the numeric part of the designation placed immediately after the first letter. Ux201a became a 01a, a uy227 became a 27 and so on. For books containing primarily tube data, like sylvania, ge, and rca tube manuals, see the tube data page. Data and circuitry resulting from this work are distributed by the electronic tube department of mullard overseas limited to electronic equipment designers throughout the world. Get the best deals on 71a tube when you shop the largest online selection at. Requests for further technical data on any tungsol tubes should be addressed to. In a vacuum tube, the tube voltage drop varies with the current and. Franks electron tube pages tube number systems tube data. Philco st shaped 71a vacuum tube amplitrex tested 80%. The book focuses mainly on vacuum tubes from the u. Arranged by subject category, then alphabetically by title. The 71a has the ability to present a sense of space that is remarkable, and somehow different than its contemporaries.
Tube 71a or rohre 71a id3600, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and. The 71a is a filament type power amplifier having low plate resistance. It began life, under the old style of tube designation, as the ux171 and was announced by the radio corporation of america in may 1926. If you have never used this facility before, click the help link on the left for detailed instructions. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. The 71a is a power amplifier tube of lowoutput impedance for use in the output stage of audiofrequency amplifiers. Basing diagrams discontinued codes distributor listing numerical page code 244 a 245a 246a 247a 249b 251a 252a 253a 254a 254b 255b 256a 257a 258b 259a 259b 262b 264c 266b 266c 267b 268a 269a 270a 271a 272a 274a 274b 275a 276a. The 31 will replace 20 and 71a in early battery sets.
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