strat777 a écrit :
en france ca ne va peut etre pas etre facile
( essaye audiotubetech il pourra peut etre te l'avoir sur commande !! )
sinon chez tube depot 20 euros la paire
http://store.tubedepot.com/mu-el84.html
d'accord aussi avec le gars du dessus jamais eu de soucis avec e-bay
( alors que j'en est eu avec des gros sites !!!)
Ces mecs sont tres serieux chez tude depot, j'achetes mes tubes chez eux ainsi que 50 % des pieces de mon ampli. S'ils livret sur la France, c'estcool, pensent a la TVA
Les Mullard, sont fabriqué par New Sensor dans l'usine Reflector, en gros, les marques c'est Sovtek, electro-harmonix, tung-sol, svetlana, mais elle a rien a voir avec la Sovtek EL84 ou EL84M, la EL84M est fabriqué aux standards militaire, donc, tout est beaucoup plus baleze, mais elle crunch moins.
J'ai les Mullard Russes, elles sonnent un peu plus punchy que les JJ. J'ai juste pris çà pour essayer, je passe au Sovtek EL84M le prochain coup.
Que çà soit TAD-EL84STR, Mullard EL84, Sovtek EL84, Electro-Harmonix EL84, j'ai l'impression qu'elles sont toutes construites de la meme facon.
http://us.st12.yimg.com/us.st.(...)08116
http://us.st12.yimg.com/us.st.(...)40955
http://us.st12.yimg.com/us.st.(...)06004
Le NOS. j'en veux pas vraiment.
Le truc a retenir avec les EL84, c'est qu'il existe à tout cassé 4 modeles, 2 modeles russes (Reflector), un modele Tcheque/Slovaque (JJ), un modele Serbe (Ei), et il y a presque plus de tube serbe.
Les Reissues de Genalex N709 (c'est le vrai qualificatif des EL84 Mullard)
devrait etre pas mal, mais sinon, idem, cest du tube Russe...
La couleur de la "plate", c'est ce qui doit faire la difference je pense, plus c'est noir, plus il y'a de carbone, plus le tube sonnera bon, c'est simple les differences sont à ce niveau
On voie bien la différence entre le Mullard et le Sovtrek Electro-Harmix
jette un oeil par la :
http://us.st12.yimg.com/us.st.(...)33921
Les versions de EL84 en revu
Versions the EL84 / 6BQ5 comes in are:
* EL84 and 6BQ5, the standard versions of the EL84. EL84 is the European name, the 6BQ5 is the same tube, but with the USA name. The English militairy equivalents of the EL84 are the CV2975, CV8069 and CV10321.
* 6pi14pi, Russian exact equivalent of the 6BQ5 / EL84. Directly interchangable.
* The E84L and 7320 are improved long life versions of the EL84. They have slightly higher plate disspation (13.5W instead of 12W) and can handel 450 volts on the plates instead of 300V (EL84).
* The 7189 is the special quality long live version of the EL84.
* 6pi14pi-EB, Russian near equivalent of the E84L, 7320 and the 7189. It can handle a bit more plate dissipation (13.5W instead of 12W) and can have 500 volts of plate voltage according to the datasheets, instead of 300V (EL84).
* The 7189A is like the E84L and the 7320, only has slightly different pinout. This should not be a problem in most amps, please ask me if you are in doubt.
* The 10BQ5 is a EL84 with 10 volt heater voltage.
* The 6GK6, 10GK6, 16GK6 and 29GK6 are equivalent to the EL84, but have different pinout and different heater voltages. The heater voltages of these types are 6.3, 10, 16 and 29 volts respectively.
* The N709 is the Mullard equivalent of the EL84.
RUSSIA
Reflector Corp, Saratov
Makes most of the tubes marketed by New Sensor Co. of New York under the "Sovtek" brand name. Some of these are old Russian types, others are made especially for export. Types in production: 2A3, 300B, 12AX7 (3 variations known), EL34 (3 versions), 6CA7 fat, 5AR4, 5881, 6922, 6EU7, 6L6GB, 6V6GT, 6072A, 6973, 7199, 7591, 7868, EL84 (2 versions), KT66, KT88, KT90, 6P15P. "Sovtek" also markets 5U4G, 5Y3GT, 6SN7, 6SL7, three 12AX7s and a few other types made at other factories. Note: there is no "Sovtek" factory. "Sovtek" is only an American brand name owned by New Sensor. New Sensor now owns the Svetlana brand name and is using on tubes manufactured by Reflector.
Ryazan Plant of Electronics, Ryazan
Makes power triodes for RF and audio applications. Some are sold outside Russia by Svetlana Electron Devices. Ryazan has also made large thyratrons and pulse tubes. Types in production: 811A (popular and sold all over the world), 812A, SV811-3, SV811-10, SV572-3, SV572-10, SV572-30, SV572-160, GM-100, others. SV types and 812A are made especially for Svetlana Electron Devices.
SED Winged C, St. Petersburg
A major Russian power-tube manufacturer. Formerly a part of the huge Svetlana collective factory, now independent. SED tubes are now distributed in North America and Europe by PM Components. Types in production: EL34, SV6L6GC, SV6550C, 300B, EL509, EF86, 6BM8, 6AS7, 3CX300A1, 6D22S, GP-5, and a long list of large power types for amateur radio, broadcast and industrial uses. KT88 and 12AX7 are have been recently introduced.
Ulyanov, Ulyanovsk
Large state-owned factory specializes in military equipment. Also makes tubes for use in military aircraft electronics. Types in production: GU-50, GU-13/813, 6S33S-V, 6S19P, 6S41P, others. 6S33 is becoming popular in high-end amplifiers in America and Japan.
Voskhod, Kaluga
Large collective factory, makes many ICs and other semiconductors as well as receiving tubes. Types in production: 6N1P-EV, 6AX7, 12AX7WA and WB, 6SN7, 6SL7 and a few other types sold by various firms outside Russia, such as New Sensor/"Sovtek" and Svetlana Electron Devices.
CHINA
Shuguang Electrical Factory No. 1
Owned by Korean firm Samsung. Shuguang makes most of the popular audio and guitar types, which are frequently rebranded by importers and OEMs. Types believed in production: 6L6GC, EL34 (3 types), 6550, KT100, 5AR4, 2A3, 807. Possibly 211, 845--unconfirmed. Shuguang's low-cost tubes are often seen in guitar amps. (Thanks to Chris Beeching for info.)
Liuzhou
Makes many types which are marketed abroad. PM Components, a British firm, has "Golden Dragon" types made by Liuzhou. (Thanks to Chris Beeching for info.)
O&J Enterprises/Valve Art
Makes the following: 6L6GC, EL34, 6550A, KT88, KT100, 300B, 300B-C60 (graphite plate 60w), 5300B (graphite plate 80w 150mA), and 6300B (graphite plate 80w 180mA), plus possibly other types, at a factory in Changsha, Hunan. (Thanks to Wilfred ter Borg for type list.)
"Sino" factory in Beijing recently stopped making 12AX7, 12AT7, 12AU7, 6GH8, 6AN8 and other small tubes, due to a poor market and tough competition from Sovtek/New Sensor. It is said that Sino made the popular, low-cost 211s and 845s often seen in SE amplifiers; this cannot be confirmed. Sino is apparently no longer making any tubes. There are other tube factories in China. Most keep a very low profile. Some of these lesser-known factories specialize in transmitting tubes such as the 811A, 812A, 813, 3-500Z,4-400, 100TH, 833 and others. Such transmitting types are often branded with old American/European brands and sold without notification that they are Chinese-made, as are the audio types.
SLOVAKIA, CZECH REPUBLICS
JJ Electronic, Cadca, Slovakia
A spinoff from now-defunct state factory Tesla factory. Outside of Slovakia, JJ tubes are often sold under the Teslovak or Tesla brandname. Groove tubes is a major distributor. Types in production: GZ34, KT88S, EL34, E34L, ECC803S, ECC83/12AX7, EL84, 2A3, 6L6GC, 6V6GTS, 300B, 7027A, 7591S. Some of the power pentode types are available in red or blue glass.
AVVT, Prague, Czech Republic
Run by former Vaic Valve Co. founder Alesa Vaic. Manufatures audio power triodes for high-end hi-fi amplifiers. Types in production: AV300B SL, AV32B SL, AV62B SL, and others.
KR Enterprise, Prague, Czech Republic
Formerly Vaic Valve Co, now operated by Riccardo and Eunice Kron. Manufactures power triodes for high-end audio amplifiers. Types in production: VV30B, VV300B, VV52B, KR1, a single-plate 2A3 and other types..
YUGOSLAVIA
EI Electronic Industries, Nis, Serbia
Former state-owned factory, makes all types of electrical products, still making tubes using some old Philips production tooling and equipment. Marketed outside of Serbia by Edicron Electronic Components Ltd, UK. Types in production: 6CA7, 6CG7, 12AT7, 12AX7, 12BH7, 12DW7, EL34, EL519, PL519, KT90, KT99, EL84, EL86, possibly a few others. Latest reports indicate that the EI factory was not destroyed in the 1999 Kosovo conflict by NATO missles.
UKRAINE
Poljaron, Lvov
Makes 833A and some Russian power types, plus related products such as vacuum capacitors.
USA
Richardson Electronics, LaFox, IL
Makes a 300B, 845 and 50 sold under the Cetron brand for high-end audio, as well as a KT88 sold under the National brand. Richardson has large quantities of tooling obtained from old American tube factories when they shut down. Also makes some larger transmitting and high-voltage types. Richardson markets many tubes, obtained from other factories worldwide, under their own brandnames; such as Cetron, National and Amperex.
Westrex Corporation, Kansas City, MO
Makes the reissued Western Electric 300B for high-end audio. Claims to be developing a KT88, WE308, WE274A and other old WE types for future manufacture. Corporate and sales offices are located in Atlanta and Chattanooga. Also has sales office in UK. Tube manufacturing facility was relocated from Kansas City to Huntsville, AL. This firm is independent of AT&T Corporation and has licensed the brandnames from AT&T.
MU, Oceanside, CA
Small contract factory, makes occasional runs of unusual glass and metal-ceramic tubes for military use. Still makes some of the old "Bendix Red Bank" tubes, such as the 6094 and 6384, in occasional lots.
Triton Services ETD, Gaithersburg, MD
Makes some Eimac and Litton glass power types, using equipment from the original manufacturers. Recently discontinued some glass types, such as 4-65A, 4-125A, 250TH, 304TH/TL, etc. (these types are now only available from China).
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