The ef tube may have a better potential as a substitute for the vf14 than the ef14, provided that an optimum, linear operating point is chosen, as already stated earlier. Preamp tubes nos and like new the best of the best. Ac2 triode for use as af amplifier or as oscillator together with an ah1. The following list shows the tube types i have entered in my database, with exception of the service types e. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications. The vf14 valve used in the impedance converter of the u47. Ge essential characteristics, the whole 228 page book in an indexed pdf file big, 11mb. Please call 1800rfparts 18007372787 for availability. Even the vf14 shares 90% of the same parts of the ef14, a tube first.
Xray properties of elements electron binding energies xray energy emission energies fluorescence yields for k and l shells principal auger electron energies. Effect of novottf100a together with temozolomide in newly diagnosed glioblastoma multiforme gbm the safety and scientific validity of this study is the responsibility of the study sponsor and investigators. I dont have necessarily data for all these types but i also have many data for types not listed. An indispensable tool if you dealwith vacuum tubes. The wide metal tube envelope is 36 mm in diameter, and excluding the footless base pins is 36 mm tall. Ef12 telefunken zaerix ef12 telefunken audio pentode for neuman microphones in zaerix box nowdays when is almost impossible to find out famous telefunken vf14m, which is specially selected telefunken vf14 in neumans laborotory in berlin for their famous u47 mic, ef12 could be. This is a suitable replacement for any philips ef11 tube type. Im not talking about the catastrophic microphonic, which is found in 19 of 20 tubes ef14. Firefighters should wear appropriate protective equipment and. Welcome to the tube data sheet locator, a popular web resource for finding data on vacuum tubes. This tube is the most successful runs in microphones, compared with the ef14, which is heated as iron. Advantages the ef series exclusive technologies and features. But the requirements for the valve in the head amplifier in a broadcast.
History of the vf14 tube and the phaedrus audio equivalent vf14m. Thus overheating all the details of the microphone, including the capsule. In a fire or if heated, a pressure increase will occur and the container may burst, with the risk of a subsequent explosion. W hat started out as a classic single ended design transformed into a very good amplifier.
The canon ef12 extension tube is an intermediate ring for closeup photography. Close manufacturing specification tolerances and improved processing provide improved reliability and. Mullard describe the e180f as a highslope rf pentode primarily intended for use in wideband amplifiers in telephone carrier systems, radar equipment and measuring equipment. Photo shows 6,3 v valves of indirect heating produced by the philips taken from a philips 320a receiver. European tubes preamp, power, tuning eyes scroll down page to check. Newly diagnosed gbm efficacy newly diagnosed gbm quality of life newly diagnosed gbm safety newly diagnosed gbm study design. Without knowing what you want the extension tube for i cant say which is better.
Ef14 sharpcutoff pentode, 8pin base, identical to uf14 and vf14 except for. Neostar electronics ef453s installation instructions manual. Wikipedia refers to the guinness book regarding two light bulbsone from. With a classic design i mean a smaller valve for voltage amplification and a power valve driving the output transformer. What kind of sonic differences might i expect from these two tubes, all things else being equal. Im just curious because ill be trying out a pearlman tm1 tomorrow with an ef12 and i know that some earlier versions ran the ef14. One of the products is a compound of sodium, oxygen and chlorine. Pin straightener is brand new and it comes with twometal mounting bolts. Two flasks p and q contain an ideal gas and are connected with a tube of negligible volume compared to that of the flasks. View and download neostar electronics ef453s installation instructions manual online. 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. It can be seen that in this miniature envelope is an even smaller valve, this very small size helps to reduce inter electrode capacitances and thereby raises the maximum. Effect of novottf100a together with temozolomide in newly.
Since the internal resistance ri of the ef is similar to that of the vf14, an added plus would be its compatibility with the original u47 output transformer. The following list shows tube types i have entered so far in my database. In order to see why finding a substitute valve was so difficult even for the. With almost datasheets and the visitor counter indicates over 4000. This way you will be able to browse and search, even if. I use a set of three kenko tubes and they work fine for me with light lenses but will not mount efs lenses.
Hpv, or human papilloma virus, is a virus that can cause abnormal tissue growth on different cell surfaces in and on the human body. Tube ef 14 or rohre ef14 id323, vacuum pentode, german steel y8a, 1938 and rfifstage shown. Extension tube ef 12 is especially suited for closefocusing with wideangle lenses. Ef14 sharpcutoff pentode, 8pin base, identical to uf14 and vf14 except for heater ratings. It is very similar electrically to the octal base ef37a and the rimlock base ef40.
Both feature new digitally optimized air actually the only difference with the original versions is that the new versions let you mount efs lenses. Sometimes brand new vacuum tubes off the assembly line have crooked pins. Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. Svetlana ef86 highperformance audio smallsignal pentode t. It was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. Lawrence berkeley national laboratory introduction. The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject. If you have never used this facility before, click the help link. Cmf corp electric fireplace models ef22 2626fg3336 homeowners installation and operating instructions. Runoff to sewer may create fire or explosion hazard. Ef file catalog is a software application that allows you to catalog your whole drive or only the information that is of interest to you. Ecgphilips limited quantity available, new old stock made in the usa.
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