These are known to be great sounding tubes and are a good alternative to the very expensive single plate version. Brans vademecum, mk buizen handboek frank philipse pocnet mirror patrik schindler 2a3. Vacuum tube, electron tube, thermionic valve, valve resources category is a curation of 19 web resources on, about vacuum power tubes, what is a vacuum tube, franks electron tube pages. Singlevalveplate type with significantly different construction to the original rca 2a3a. New manufacture tube cap connectors and tube bases. Mar 26, 2016 that is a very broad statement, cheap chinese tubes are just that, cheap and in most cases you get what you pay for but i quit chasing nos tubes for my all tube system a long time ago, if psvane makes a premium tube for what ever my need is i buy, install and move on. The author chose the 2a3 directly heated triode power tube to implement the loftinwhite circuit.
A vacuum tube, an electron tube, or valve british usage or, colloquially, a tube north america, is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. Some actually have 2 completely separate plates which are in parallel. I know of a number of people whose amps cause very premature failure with this tube. Makes sense, though, for in some substitution guides, the 2a3 is mentioned as a substitute for the 45.
These tubes produce an enveloping soundstage and have a tonal balance that is a little bit fuller than typical 2a3s. Loftinwhite 2a3 singleended triode tube amplifier schematic. A few things you must pay attention to before you swap your current 205d tubes to the psvane we205d205d l replica tubes. Yaqin ms2a3 vacuum tube hifi integrated amplifier new. Antique radio forums view topic 45 tube replacement. Designer and manufacturer of audio amplifiers and elrog vacuum tubes. Electron tube data sheets electron tube data sheets, valve, tube, electron tube, vacuum tube, diode. Buy sovtek 2a3 vacuum tubes online, in stock and ready to ship.
Vacuum tube, vintage radio and other electronics information. The exceptionally large powerhandling ability of the 2a3 is the result of its design. The technical data is contained in the highresolution color scans of over 20 original catalogs from 1958 to 1963. Vacuum tube 2a3 x 4,12au7 x 2, 12ax7 x 2 input power voltage. Electron tube data sheets electron tube data sheets. For pushpull operation, a tuned, balanced output tank circuit is required. Vacuum tube data sheet locator electronic circuits.
The power supply use a 5v4g tube rectifier and clc filtering. There is only one plate, but there are 2 sets of filaments and grids which share a common plate. The 2a3 is a directly heated output tube which enjoys continued. Vacuum tube, electron tube, thermionic valve, valve. The 2a3 tube amplifier a tribute to simplicity and warm. This 1932 rca below manual provides all the data sheet information, of the first radio receiving tubes ever made, from about 1920 to 1932. Nos tube specification sheet nos tube specification sheet. It was widely used, in specialquality versions such as ecc82 and 5814a, in presemiconductor digital computer circuitry. Psvane we205d205dl replica vacuum tubes pair psvane.
If you arent sure which type of vacuum tube your device uses, you can often take a look at the users manual for your device to learn more. Jj 2a3 40 watt power vacuum tube quite possibly the most sturdy modern production triode we have ever seen. Triode lab 2a3s vacuum tube power amplifier triode lab is. Maximum plate curent of everage tube for fixed bias ia 70 ma. Believe it or not, i have a mint nos tungsol type 45 tube in a mint type 45 box.
You can also choose from home amplifier, professional amplifier 2a3 tube amplifier there are 98 suppliers who sells 2a3 tube amplifier on, mainly located in asia. 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. In electronics the 300b is a directlyheated power triode vacuum tube with a fourpin base, introduced in 1938 by western electric to amplify telephone signals. Free vacuum tube data sheets free vacuum tube substitution. The tube is popular in hifi vacuum tube audio as a lownoise line amplifier, driver especially for tone stacks, and phaseinverter in vacuum tube pushpull amplifier circuits. These are the same as the rcas but are other brands like sylvania, ge, raytheon, tungsol, etc. I used 14 gauge enameled wire from the junkbox and wound the tank inductor in two sections, using a 4 o. Tube amplifier project page after restoring a nice old 1938 sparton model 1568 console radio, i was so impressed with the quality of the sound that i started looking into building an amplifier using the same 2a3 output tubes that the big console uses.
An incomplete look at russiansoviet tube history a history of tube development from the days of the czar to modern times. Take a look at your 205d tube socket if it is the same as the original western electric 205d socket for 4 smaller shorter pins, you need to order the we205d replica. This combines the mechanical stability of solid plate tubes, with the properties mesh materia, which is soft, and has a resonance damping function. In some cases, the listings for new or preowned vacuum tubes may indicate which devices that they are used with.
This jj 2a3 boasts a 40 watts plate dissipation rating which is 25w more than other 2a3 tubes which will provide wider dynamic response to any system. The emissionlabs 2a3s is a high power version of the standard 2a3. We have new manufacture top caps to fit most tubes as well as pin connectors for things like types 3c24, 829b, 832a, etc. Tubedepot carries a selection of 2a3 6a3 300b power vacuum tubes. The big question with these tubes has to do with compatibility with the amp. For detailed technical information please see the rca data sheet. At higher bias though, the tube can produce 2x the output power.
Triode lab 2a3 s vacuum tube power amplifier triode lab is the little company that can. Threeelectrode, highvacuum type of power amplifier tube for use in the. Singlevalveplate type with significantly different construction to the original rca 2a3 a. Tv tube, 43cm diagonal, electrostatic focusing, magnetic deflection, white fluorescence, tetrode system, 110 degrees deflection angle 431qq44 identical to 430qq44, except with metalbacked screen.
Ive seen some that would at first appear to be single plate 6a3s but are in fact remarked vt52s. In the 1980s it started to be used increasingly by audiophiles in home. Comparing directly to a eh 2a3 gold pin tube the construction level is reasonable but there is still room for improvement to reach eh level especially the base and the letting on the tube. Typically these valves due to higher ht tolerances also have substantially higher plate wattages which can be listed e. These newoldstock vacuum tube specifications are provided as informational only. Due to coronavirus covid19 we have limited staff working on location.
A booklet showing a comparison of the best buys in tubes for power output. In most cases, its simplest to replace the vacuum tube in your device with the same exact model. Tube data vintage info from the age of vacuum tubes. Russian subminiature tubes a discussion of the construction details of subminiature russian tubes. In my amp, the best sound 2a3s have been eml meshplates. Antique radio forums view topic 1619 substitute for 45. Tube 6a3 or rohre 6a3 id2686, triode, vacuum, uxbase 4 pins 2 thick, usa 1924, ux and poweroutput shown. The idea for the amplifier started from the authors discovery of the loftinwhite circuit.
Only thing is, one look at the tube itself will show you that its actually a 2a3 branded as a 45. The 2a3 vacuum tube is a power triode capable of outputting 3. Electron tube data sheets electron tube data sheets, valve, tube, electron tube, vacuum tube, diode, triode, tetrode, pentode, hexode, heptode, octode, enneode. It has many circuit diagrams, using these tubes and all the information, about these original vacuum tubes. Advanced searching facilities help you to compare different types and make substitutes for hard to find vacuum tubes. Triode lab 2a3s vacuum tube power amplifier triode lab is the little company that can. Click to expand click to contract browse all products. For more information about power supply design with vacuum tube rectifiers, see matts informative article power supply design for vacuum tube amplifiers. We also carry 4 pin and 8 pin tube bases which make great plugs and also allow one to make adapters and coil forms.