You reach this tube or valve page from a search after clicking the dataheet tab or by clicking a tube on a radio model page. Ecc8112at7 page 1 of 4 franks electron tube data sheets. Tube ef 86 or rohre ef86 id2011, vacuum pentode, noval, b9a and audio frequency shown. Ef86 vs 5879 tube amp information, guitar amp schematics.
Vacuum tube ef86 6267, tube amp doctor, premium selected. Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. Its design is low noise and antimicrophonic and was developed from the b8a ef40. Twin triode, 12ax7 datasheet, 12ax7 circuit, 12ax7 data sheet. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications it was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. The ef86 was used in many preamplifier designs during the last decades of vacuum tube hifi development. It is very similar electrically to the octal base ef37a and the rimlock base ef40. Svetlana ef86 highperformance audio smallsignal pentode t. The tube amp doctor ef86 6267 is a low noise and low microphonic. In high gain applications such as tape recording care should be taken in siting the valve, particularly when a loudspeaker is present in the same cabinet or where a motor is mounted. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base. The connection for the suppressor grid has been brought out.
A collection of we datasheets from the 40s through the 60s, including 100 through the 300b 17mb pdf file 301a through the 373a 14mb pdf file 300a300b data sheet highres, 4. Output pentode el84 is an output pentode for use in guitar and hifi amplifiers. Although used in circuits such as tape recorder input stages shfet instrument amplifiers, microphony can be a problem, even when mounted in a vibrationreducing valve holder. This is an exact copy of the kt88 valves that were manufactured by marconiosram for marshall in the late 1960s and 1970s. Introducing the new mullard kt88 audio vacuum tube. The full mullard data sheet is available by clicking the valve name at the top of the page.
Type ef86 was first introduced in datahseet the uf86 is identical with the exception of a the full mullard data sheet is available by clicking the valve name at the top of the page. Pentode at higher frequencies the effect of vibration is usually negligible on account of the damping provided by the chassis and the valve holder. In such cases a flexible mounting for the valveholder or a separated weighted subchassis is advisable. Ef86 datasheetpdf list of unclassifed manufacturers in such cases a flexible mounting for the valveholder or a separated weighted subchassis is advisable. The 1943, 1949 and 1959 sylvania tube manuals online. The mullard ef36, ef37 and ef37a at the national valve museum tdsl tube data. So no,you cant just graft a 5879 tube into the spot where an ef86 was. The electroharmonix ef86 6267 is a high quality current production pentode, very warm and smooth sounding. The tube construction consists of triple getters, additional support posts, and cooling fins along the anode.
Ef86 voltage amplifier, particularly in the early stages of highgain audio amplifiers, microphone preomplifiers ond mognetic tape recorders. It was first shown at the radio show and first used in their amplifier from the ef86 was used in many preamplifier designs during the last decades of vacuum tube hifi development. Pentode the ef86 is the standard early stage audio preamplifier valve. Bill beechs online tube data from mostly rca manuals. The ef86 is the standard early stage audio preamplifier valve. Neumann u47, u48 and u67 microphones were originally used by the beatles for their 1960s concerts and recording sessions.
Ef84 datasheet, ef84 pdf, ef84 data sheet, ef84 manual, ef84 pdf, ef84, datenblatt, electronics ef84, alldatasheet, free, datasheet, datasheets, data sheet, datas. Within the mesh screen can be seen the suppressor grid with the two small anode plates on the left and right of the image. Ce tube est specialement prevu pour les etages preamplificateurs a. Care in the design of the valve to ensure that the electrode structure and its mounting are as rigid as possible has reduced the microphony of the ef86 to a very low level. 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 ef86 1 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications. Unlike many pentodes it was designed specifically for. You have to have one more gain stage to drive the 5879 tube.
Ef86 data sheet pdf 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 needs another gain stage before or after it to work. Vol tag e amplifying pentode low noise pentode intended for use as r. Jj ef806 is a pretty good tube, the only thing missing is ef86 marking because it is not near specifications of real ef806. Pdf max22 7pa671a ef861 ef86 tube ef86 ef86 pentode ef86 tube ef 86 tr10de bel 188 ef40 tube cathodique philips. Most of the datasheets are in pdf format and some are links to other html pages. Jj electronic vacuum tubes, capacitors, amplifiers. You reach this tube or valve page from a search after clicking the tubes tab or by clicking a tube on a radio model page.
Microphonics are not an issue in combo amps, so we finally have an ef86 type that works at this conditions. Gec, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors. Eirc electronic tubes factory data sheet ecc8112at7 page 1 of 4 telephone. Vacuum tubes guitar amplification tubes electronics stubs. Try searching the tube data sheet locator, the worlds biggest index of tube datasheets other pages online with tube data. At the bottom of this page youll find some links to other tube datasheet sites in case you cant find what youre looking for here. Western eectric 3 1 0 a va c u u m t u b e classificationvoltageamplifier, suppressorgrid pentode with indirectly heated cathode this tube is intended primarily for use as an audio, or carrier and radiofrequency voltage ampli. Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance. Type ef86 was first introduced ef6 this electronicsrelated article is a stub. The ef86 was used in many preamplifier designs during the last decades of vacuum tube eef86 development. The full mullard data sheet is available by datashwet the valve name at the top of the page. Requires sorting to get low noise and tight bias as ral tube of this type should have. I tried building an amp with just a 5879 and it didnt have hardly any volume. This exhibit was made by mullard who designed the ef86.
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