This tube was mainly used for the aegtelefunken magnetophone production, but evolved into much of the professional studio equipment of the time. This data is scanned and may contain errors caused by the ocr software. If you push a 6dj8 to 10 or 15ma, the result is a gm of 12,000 or so. 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 it was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. It is a small, sturdy, glassoctal heater cathode type used as an af power amplifier and modulator and as an af power amplifer and oscillator. This beacuse a plate resistor would translate in a max value of 10 kiloohms with. To get the needed voltage drop from the 250 volts supply i decided to go for a ccs. Datasheet of triodes, diodes, penthodes,tetrodes, vacuum tubes. The triode is the oscillator and has to produce 5 v pkpk signal. This tube may be used with full input up to 60 mhz and with reduced input up to 175 mhz.
W hat started out as a classic single ended design transformed into a very good amplifier. It was introduced in the late 1950s and was produced by philips, mullard, telefunken, valvo, and gec among others. All tubes new, military equipment and have otk mark. Theres no word on what these tubes will be used in and theres no data sheet. The switcher controller is a simple switcher part from national semiconductor. You can use the search to find service types or go to the service type lists that you can access from the page more tube related stuff.
Aug 09, 2016 this new tubechip thing was brought to life by korg, makers of fine musical equipment and noritake co. Svetlana ef86 highperformance audio smallsignal pentode t. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes, or discharge tubes. This new tubechip thing was brought to life by korg, makers of fine musical equipment and noritake co. It is very similar electrically to the octal base ef37a and the rimlock base ef40. The 6146w vacuum tube is a ruggedized military version of the 6146 family of tubes. This would be mainly for radio as television receivers tended to use the pcfnn 300 ma valves. With a classic design i mean a smaller valve for voltage amplification and a power valve driving the output transformer.
Subminiature transmitting pentode for use in radio sondes, 95108 datasheet, 95108 circuit, 95108 data sheet. Recent listings manufacturer directory get instant insight. Svetlana ef86 highperformance audio smallsignal pentode he svetlana ef86 is a glass envelope miniature pentode intended for highquality audio preamplifier service. The noise that is there is a mostly tube noise, as opposed to 60hz hum or buzz or other sounds that are annoying. Only a few types are still used today, mainly in highpower, highfrequency applications. Barczynski, who offered me a lot of diskspace online, i can put all my datasheets on the web.
Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance. E80cf7643 amperex pq telefunken 6bl8 substitute the e80cf is a special quality mediummu triodepentode. The following formula illustrates why this tube is so good on noise. Tubes with part numbers beginning with 6aq8 ecc85 tube are in stock and ready to ship. Biased at 2 volts and running at 100 volts means about 14ma plate current which suits my power transformer. Feb 11, 2016 rating is available when the video has been rented. 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. I really like the way it sounds, but as you might expect, using a pentode in the front end is not the quietest thing you can do. Philips, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Here is a quote from an old amperex data sheet for the ef86. Mullard say that the ecf80 was designed for operation up to 220 mhz. Beginning in the 1950s mullard was producing hifi amplifiers that used the ef86 as a highgain input tube and vox was doing the same in their guitar amplifiers.
The suitability of the 6dj8 for audio tube audio store. The tube is manufactured by the oktjbr, vinnitsa, ukraine. Brimar data sheets show this triode pentode valve as designed for vhf frequency changer use. Rating is available when the video has been rented. Ive been working on a passive riaa pentode phono preamp. To view this site, you must enable javascript or upgrade to a javascriptcapable browser. Quite a lot of folks listened to it at etf, and i had nobody say anything about the noise, nor. A perfect tube with no excess or 1f noise has a minimum grid noise resistance of rn 2. Also see 7643e80cf mcintosh mr67 tuner to buy 7643 amperex e80cf7643 amperex germany pq nos made by valvo hamburg germany original boxes 19611966 recommended pairs e80cf.
First the v72 was reequipped with this state of the art telefunken ef804s audio tube made in their berlin and ulm production. The 6883b 8032a 8552 vacuum tube is a small, sturdy, glassoctal heater cathode type used as an af power amplifier and modulator and as a rf power amplifer and oscillator. Many industrial, military or otherwise professional tubes were also produced. Be aware that the tube makers control the mu more tightly than the gm and rp, so dont rely too heavily on the gm. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. Ef183 datasheet, cross reference, circuit and application notes in pdf format. Ef183 tube tube ef183 socket noval 7z0022 noval 10010l 200f tube cathodique philips tube cathodique culot. Franks electron tube pages foreign substitutes for american types this data is scanned and may contain errors caused by the ocr software. The ef86 is a high transconductance sharp cutoff pentode vacuum tube with noval b9a base for audiofrequency applications. Current production by tungsol, jj electronics, and electro harmonix, as well as various nos brands. The tube can be used without special precaution against microphonic effects, in amplifiers in which the input voltage is greater than 10 millivolts, when the tube is mounted in the vicinity of a 5 watt loudspeaker with an efficiency of 5% the vox ac4 is the only guitar amp.
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