7025 Vs 12ax7

The only place to shop for preamp tubes based on their sonic attributes. A 12AT7 is a lower gain tube from a 12AX7/7025/ECC83. 9 out of 5 stars 10. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. was the originally supplied tube to Fender in the 1950s if you want to be period-correct. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). 25 mA/V è il minimo richiesto per un tubo nuovo. Fue comercializada al público con el nombre de 12AX7 el 15 de septiembre de 1947. You can use Google and check out lots of information 12AX7A vs. Fue desarrollada en 1946 por los ingenieros de RCA [1] en Harrison, Nueva Jersey, con el número de desarrollo A-4522. To make things easier to find, I've listed all the equivalents from the header, so some files will be duplicated. The 5751 version of the 12AXY tube is a military version that is rugged and has a lower Gain of 70. I run 5751s in my 12AX7 slot and can hardly discern less volume. EUR 69,00 +EUR 8,45 spedizione; 1x 12ax7a = 5751 ecc83 USA NOS Tube Tubo Valvola. As SD97 noted a 7025 was a military tube. Vous pouvez installer plusieurs lampes différentes dans votre ampli à la place des 12AX7. 12AX7 is the US number. in Western Europe and in the USA) there was no need for any of this crap. 12AX7: Since this is the most common tube in guitar amps, a wide variety of brands (including some resurrected old brands) are available to choose from. Thanks to its design it also peforms with very low noise and microphonics. 12AX7 preamp tubes play a remarkable, dynamic role in the creation of the final tone in your vacuum tube amplifier. The tonal characteristics were easier to hear. They are marked "COMPUTOR", and were made for mainframe computer arrays, back when computers took up whole rooms. NOS in original boxes labeled as Motorolla and Truetone. In an amp you can replace a 12AX7 with a 7025 but not vice versa. Co istotne, to "zwykłe" 12AX7 EH grają zupełnie inaczej - gorzej od tych na złotych nóżkach. google "12ax7 vs 7025": get responses like: In the old days the 12AX7 and 7025 were different quality tubes. These don't appear to light up because of the spiral filaments, please listen to your amp before emailing us about a DOA tube!. Shop our great selection of 12AX7, 12AX7A, 12AX7EA, 7025, ECC83, ECC803S, 5751 (low gain), CV492, 7058, 12DF7, CV4004, B339, E83CC, M8137vacuum tubes now. You can use Google and check out lots of information 12AX7A vs. The 7025 WA supports a fat midrange and creates a bold tone with lots of overtones. My Favorite Tubes and Their Substitutes by Robert H. 7025 * * * * The 7025 has a higher gain than a 12AX7 tube. Bien selectionnées ces lampes modernes sont très bien. Factory selected for low noise and minimum microphonics. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). ) typically reduces circuit gain by 28% and slightly increases BW by 4%. It was designed for use in high fidelity audio circuits. I run RCA blackplates in my Tweed Bassman clone that were probably made about 25 years before I was born. Factory pre-selected for closest tolerances and best performance. Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. Very low microphonic. Soft highs and dominant mids help emphasize the amp's original sound. 12AX7 (also ECC83, 7025) Preamp Vacuum Tube. The V2A gain stage uses a 12AX7 triode with a 250V plate supply voltage, 100k plate load resistor and 1. This tube was very similar to #1, but we felt that solo instruments came forward in the sound stage just a little more. Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. 12AX7は、つい数日前に入手したBrimarが私には合いそうです。Telefunkenは全域に渡りフラットで優秀、でもちょっと音が硬い感じがします。Mullardは逆に柔らかすぎで少し暗いイメージ。Brimarはその中間で、お互いの良い所を併せ持った感じで良いです。. By this scoring, the best tube overall is the Electro-Harmonics 12AX7. Original equipment in '60s Fender guitar amps. 12ax7 vs 12ax7a Showing 1-23 of 23 messages. NOS in original boxes labeled as Motorolla and Truetone. Two of the ECC83 / 12AX7 and two of the 7025's. Generally, many companies had their own designations and suffixes and prefixes to make their product stand out. We need a mention the fourth member of the Sovtek 12AX7 family. Tube 12AX7 or Röhre 12AX7 ID3730, Double Triode, Noval, B9A and Audio Frequency shown. 12AX7 and 5751 (equiv. In case this tube is currently not available, we recommend as replacement tube: RT080 Q: When does a preamp tube become a Premium Selected tube?. Title: 12AX7 6AX7 Author: Sylvania Subject: JA-FP-2002-03-23 Created Date: 3/24/2002 12:54:30 AM. Audio tubes for guitar amplifiers and audiophile equipment. It is also a crisper sounding tube. EUR 70,00 +EUR 8,45 spedizione; 12ax7 ecc83 5751 12AX7 12ax7a 6072 7025 m. They are interchangeable, though the 5751 has a gain rating that's less than the 12AX7. Similarly, substituting a 12AY7 for a 12AX7 reduces circuit gain by almost half (45%) but nearly doubles the BW. The 12AX7 was made for quite a while. The Europeans had this too and called this specials designs E83CC (simply a mix of the number and capitals). Παράδοση έως 30 ημέρες. You can put 12V across both heaters, or 6V across the individual heaters and ground the centre tap. Original equipment in '60s Fender guitar amps. Lots of gain with a rather low noise floor. For use as 12AX7 an adaptor or an adjusted socket wiring for pin 2+3 and 6-8 is required. GE NOS LONG PLATE 12AX7 NOS $45. This amp looked brand new and still had all its original tubes. 12AX7 Basics. So that # became obsolete. La 12AX7 o ECC83 es una válvula doble triodo de base noval B9A con un elevado grado de ganancia. They are very close but the gold pin will have slightly less gain in the mids. The 12AX7 is a high-gain (typical gain factor 100), low plate current triode, and is therefore best suited for use in the preamplifier (input and mid-level) stages of audio amplifiers, guitar amps , mic preamps etc. The 7025 has a coiled filament which is supposed to reduce hum in circuits using AC on the filaments. 70 each) Northern Electric 12AX7 (most expensive $58 each) Most of these tubes are more expensive than the Tung-Sol's, Mullard RI's and JJ's, but you get what you pay for. For example a 12AX7 was available as 7025 (JAN/Military), ECC83 (England), CV4004 (France?), etc. The 7025 and 12AX7A data sheets both say: "For high-fidelity audio-amplifer applications critical as to noise and hum. 00 each or $60. Recently a fan of ours who is a fellow audiophile sent us each a vintage early-to-mid 1960s German Telefunken 12AX7 Tube. No microphonic issues even with the most sensitive preamps. Can be also used as replacement for 12AX7 in many applications. The 12AX7 was made for quite a while. Note that the modern Sovtek 12AX7WC is actually a pretty good valve. The ECC83 is a mid gain tube and will have less gain than a 12AX7 (ECC803S). The 12AX7-B does in fact have more g ain and lower noise than it's counterpart, and the Tung-Sol is a well rounded, bright and gainy tube, just don't use more than 1 in your amp. Salve possiedo un ampli fender super twin rewerb, e da voi ho acquistato tutte le valvole per fare un chek up totale (7025 WA tad hi,12at7,7025 S premium,6L6WGC-STR GE,6C10,6CX8). Interchangable tubes: 12AX7 12AX7A ECC83 7025. Tra l' altro la valvola 6C10 per me era introvabile. This represent standard construction / quality / hum / micrphony etc. 며칠전 트위드 챔프에 있던 50년대 후반 RCA 12ax7 관을 하나 깨먹었습니다. The Westinghouse tall ribbed plate are poor. I compared this tube against an old EI and Telefunken smooth plate and there was very little difference. This 7025 tube is regarded as the holy grail among the double-triode preamp valves. TAD ECC83-Cz (verified JJ ECC83S) in Marshall DSL50. La désignation industrielle est en 4 chiffres, comme 7025 pour la même lampe ! Haut : Ced777 Vintage Méga utilisateur Inscrit le: 19 Aug 03 Localisation: Paris # Publié par Ced777 le 07 Nov 04, 06:07 pm. The ECC83 MG is a "Mid Gain" 12AX7 type tube. By Sylvania. One thought on " RCA 7025 Short Plates " nick-seattle on May 11, 2012 at 3:29 PM said: Great overall tube with fantastic balance - and definitely no microphincs. Ultra-low noise, but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. Radio tubes are valves. 7025 * * * * The 7025 has a higher gain than a 12AX7 tube. The following should be direct substitutions. and 7025 is the industrial name. The ECC83 Gallery 12AX7 E83CC 7025 ECC803S : 5751 CV4004 CV492 B339. Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. All these tubes are interchangable and all have the same gain structure. Mullard 12AX7 reissue, in V1 or V2 in several amps, only if they can be kranked enough, otherwise they can sound hi-fi and sterile. 12AX7 Vs 7025, Ok whats the deal here I had an issue with my Achillies Super Reverb (Power surge at home ) which took out the Rec tube and a preamp tube. The 12AX7A seems to have appeared in 1960. Classic tube for all Fender and similar amps. After the original 12AX7, additional variants were issued with various industrial numbers (including the 7025) as well the 12AX7A. I compared this tube against an old EI and Telefunken smooth plate and there was very little difference. This has a spiral wound filament which reduces hum and noise. Su ganancia es alta entre las ECC83/12AX7, suena radical en Marshalls clásicos y vibrante en Fenders, y aporta definición y detalle extra en preamps hi-gain. Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. Tube Question - 12AX7 vs. The 7025 is a low noise version of the 12AX7A. When they discontinued the 'AX7 a couple of years later, the 'A was referred to as strictly an audio tube, and the 7025 (introduced at the same time as the 'A) became the upgrade of the 'A. Can be also used as replacement for 12AX7 in many applications. RCA 12AX7: This is a 7025 alternative that delivers less efficient transfers of power but boasts greater noise reduction capabilities. Ultra-low noise, but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. The best for THD is the Sino 12AX7, but wow does that filament glow bright for a second or so after switch on! If you want gain, go for a Sovtek 12AX7LPS or a Mullard 12AX7; For lowest microphonics, Tung Sol 12AX7. For example, a Czechoslovakian made JJ 12AX7 will be different from a Soviet-made SOVTEK 12AX7. Elektronka do předzesilovače typu ECC83 / 12AX7. Tubes test as premium new with very low noise--guaranteed not to be microphonic!. 참고로, 제가 가진 12ax7 계열은 55년 ~ 69년입니다. 6681 Disclaimer Submit a tube. We will take a look at why you might, or might not want to swap out the different types of tubes. d similar / same as the 12ax7. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. These don't appear to light up because of the spiral filaments, please listen to your amp before emailing us about a DOA tube!. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. I have not tried 7025 Long. 12AX7 (also known as ECC83) is a vacuum tube that is a miniature dual triode - 6AV6 with high voltage gain. ) sound nice. ARS Electronics Since 1947 - Audio Catalog Page. Make Offer - Amperex BUGLE BOY 12AX7/ECC83 Round Getter/Grey Plates STRONG Tested Vacuum Tube RARE Amperex 12ax7 ECC83 Bugle Boy 6J Mc2 D-foil Getter 12ax7a 7025 10m Ecc803s $165. First tube the 12AY7 preamp or the 12AX7 or 5751 voltage amp, Second and third tubes are 12AX7 drivers. 0:00 jj-ecc83s 2:30 ge-7025 トライオードの、ge6550・5極管接続シングルアンプの、電圧増幅管を交換、音の違いを比較してみました。 最近のメーカー製. 5751s fly just a little under the radar and so you can get good ones at a better price. The Audo Catalog Pages are also focused on listners of all types of hi End Electron Tube Guitar amplifiers and Hi End Vacuum Tube audio amplifiers. Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type. and 7025 is the industrial name. A 12AT7 is a lower gain tube from a 12AX7/7025/ECC83. Die ECC83 (amerikanische Bezeichnung: 12AX7) ist eine Elektronenröhre (Doppel-Triode), die vorwiegend für Niederfrequenz-Anwendungen konzipiert wurde. Some folks (guitar guys typically) that have gear that come equipped with 12AX7's will sub a 5751. 12AX7 / 12AX7A / 7025 TUNGSOL USA (one of the best US 12AX7 ever made, very dynamic and musical with superb tonal balance, better overall than RCA) TO BUY 12AX7 Tungsol 1951-1960's. Visit us now!. 3vが6vでも問題はありません). The 12AX7 cathode follower, the tone stack, the long-tailed-pair phase splitter, the push-pull power amplifier, and the power supply. A 7025 is a low noise version of the 12AX7, originally developed for the military. TAD RT010 Tube 7025 Highgrade. The 12AX7 is a 9-pin miniature, high-mu, twin triode. The JJ ECC83-MG is a fine sounding tube. 12AX7 and 5751 (equiv. Flying Leads Plug&Play CV4035 - Premium 12AX7 ECC83 ECC803S E83CC 7025 CV4004 CV492 M8137 M8214 6057 type. The bunch I have is a little noisy, so I wouldn't mind paying the extra $$$ for microphonics and noise screening, this tube really rocks!. Most SPICE model links are to Dave Cigna's stash of SPICE models provided by Francesco Piazza- these are marked DC. These are usually the best choice for demanding hi-fi applications, although the premium brands and blackplate types also have very low noise. A modern 12AX7 with a W prefix means nothing in particular. ECC83 est la désignation européenne, alors que 12AX7 est la désignation US. Re: Fender preamp tubes 7025 vs 12AX7 Right, in the 50ies those 7025 had a different heater/cathode design, later on the 7025 was simply a selected and tested item. By Sylvania. ) sound nice. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. It was released for public sale under the 12AX7 identifier on September 15, 1947. The main event is the "Battle of 12AX7" which is something I have tried to organise for the last two months or so. 12AX7 tube is the most common preamp tube today. チューブアンプのプリ管12ax7を12at7に交換したらどういう現象がおこりますか? 12ax7の増幅率は100μ有ります。以下は互換可能なプリ管です。7025(12ax7のローノイズ管)・・・100μ5751(12ax7の高信頼管、軍用管)・・・70μ12at7. La 12AX7 o ECC83 es una válvula doble triodo de base noval B9A con un elevado grado de ganancia. " From the RCA spec. The tonal characteristics were a bit different too but not sure if that is a direct result of the tubes or the tubes interaction with the other circuitry. The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible. TAD 7025 S - Mullard předzesilovací elektronka ECC83 12AX7. L'atelier est fermé "jusqu'à nouvel ordre". GE used/tested ANOS Long Plate 12AX7 (these sound great in Fender amps) $20. Note that the modern Sovtek 12AX7WC is actually a pretty good valve. It is also a crisper sounding tube. 3vが6vでも問題はありません). EUR 70,00 +EUR 8,45 spedizione; 12ax7 ecc83 5751 12AX7 12ax7a 6072 7025 m. 12ax7wa Amperex. The only place to shop for preamp tubes based on their sonic attributes. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. 12AX7 TUNGSRAM HUNGARY (these typically have very low noise and are under-rated 12AX7's, copper grid posts) TO BUY 12AX7 Tungsram. The ECC83 is a mid gain tube and will have less gain than a 12AX7 (ECC803S). The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics. to ECC83, 12AX7, 7025) All of the 12AX7 types listed may be used to replace 7025 or 12AX7A. ECC83S - 12AX7, 7025 A. Soft highs and dominant mids help emphasize the amp's original sound. Re: Fender preamp tubes 7025 vs 12AX7 Right, in the 50ies those 7025 had a different heater/cathode design, later on the 7025 was simply a selected and tested item. In case this tube is currently not available, we recommend as replacement tube: RT080 Q: When does a preamp tube become a Premium Selected tube?. Neat - and only 9 pins. That said, I have heard distinct differences between RCA short gray-plate 7025 (more chime and clarity) and the identical-look RCA 12AX7A short gray-plate (fat, strong lows, harsher highs, murkier character). 12ax7 vs 12ax7a: adam79: 12/2/10 10:42 PM: Is the 12ax7a the predecessor to the 7025 tube? A lower noise tube? I found a 12ax7a that I think is a Mullard, but I'm not 100% sure. Please try your search again later. • 7025/ECC83 equivalent Strongly committed to quality manufacturing, Tung-Sol tubes have always been known for their reliability and great tone. TAD 7025 S - Mullard předzesilovací elektronka ECC83 12AX7. 99% of valve amplifier manufacturers use ECC83 (12AX7) as the first preamplifier valve so if it’s good enough for them …. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). Thanks to its design it also peforms with very low noise and microphonics. First tube the 12AY7 preamp or the 12AX7 or 5751 voltage amp, Second and third tubes are 12AX7 drivers. Make Offer - Amperex BUGLE BOY 12AX7/ECC83 Round Getter/Grey Plates STRONG Tested Vacuum Tube RARE Amperex 12ax7 ECC83 Bugle Boy 6J Mc2 D-foil Getter 12ax7a 7025 10m Ecc803s $165. 5E3 Deluxe Second Gain Stage. sheet, from April 1959: "For high-fidelity audio-amplifier applications critical as to noise and hum. 12AX7 is a miniature dual triode tube with high voltage gain. I was hitting it with finger quite hard with no audible effects 🙂 Very smooth sound, not as smooth as RCA 12ax7 Long Gray Plates, but quite close. Also known as the Groove Tubes ECC83-S and Ruby 12AX7ACZ HG. Audio tubes for guitar amplifiers and audiophile equipment. sovtek 12ax7waなら3年保証付のサウンドハウス!楽器・音響機器のネット通販最大手、全商品を安心の低価格にてご提供。送料・代引き手数料無料、サポート体制も万全。首都圏即日発送。ロシア製のスタンダードな真空管です。. Παράδοση έως 30 ημέρες. It hits the numbers pretty well for a new production valve. Phenomenal Valvo or Siemens Halske ECC83 12AX7 "LONG PLATES" 1950's "D-FOIL-GETTER" NOS SINGLE TUBE OR PAIR! Add 1967 NOS GE USA JAN 12AX7 WA 7025 MILITARY ECC803S DIGITAL BALANCED PERFECT TRIO. This has a spiral wound filament which reduces hum and noise. Interchangable tubes: 12AX7 12AX7A ECC83 7025. Bien selectionnées ces lampes modernes sont très bien. What is the difference between any of these three vacuum tubes? The earliest mention of the 7025 I found was mid 1958. It is the Sovtek 12AX7LPS. Sie wurde 1948 von RCA entwickelt. Il suono è fantastico e devo dire che tad ha dei prodotti di ottima qualita. New Gain Tested Tung-Sol 12AX7 / ECC803S GOLD PINS Vacuum Tube. The tonal characteristics were a bit different too but not sure if that is a direct result of the tubes or the tubes interaction with the other circuitry. ) sound nice. Recommended for the 1st gain stage. You can beat the crap out of it and it will still go! Interesting notes: I have heard that ECC803S tubes (12AX7's on Steroids) are great for guitar amps because they have a spiral filament for reduced. EUR 69,00 +EUR 8,45 spedizione; 1x 12ax7a = 5751 ecc83 USA NOS Tube Tubo Valvola. 6vですがヒーターの中点からリードが出ていてそれが9番ピンです、 4~5ピンを一緒に繋いで9番ピンとの間に6. I was unable to notice a loudness reduction compared to the standard JJ ECC83S tube. By Sylvania. I Tetrodi: Sono valvole che rispetto ai triodi, hanno una griglia in più che è chiamata griglia schermo e ha la funzione di ridurre la capacità che si crea tra l'anodo e la griglia di controllo. electro-harmonix / 12ax7eh 真空管 プリ管 12ax7 ロシア製 互換真空管 12ax7a,12ax7wa,12ax7wb,7025,5751,12ax7wc,ecc83,e83cc. I have a few Tube preamps, one of which is a Cary Audio CAD-5500S. I can't really offer much help on the new production tubes, but I do know my way around NOS tubes pretty good. As SD97 noted a 7025 was a military tube. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. 5k cathode resistor. This put it at least two laps ahead of the 6EU7 in marketability. 12ax7 / ecc83 互換 ロシア製 voskhod 6Н2П-eb ( 6n2p-ev ) (高信頼版) 真空管 元箱入り 双三極管 2本セット ¥1,500 ¥ 1,500 2020/5/9 土曜日 までにお届け. 7025 * * * * The 7025 has a higher gain than a 12AX7 tube. 12AX7, 7025, ECC83 - zamienniki i opinie Zaloguj się, aby obserwować tę zawarto Ja stosuję Electro-Harmonixy 12AX7 Gold Pin - wg mnie są rewelacyjne. 진공관 찾으러 박스도 몇번 뒤지고, 친구네서 하나 얻어오고, 소리전자 중고장터에서 하나 샀습니다. Some of the "obscure" 12AX7's are: Preferred Series 7025 ($24 each) Any TAD, but mainly the 7025S ($25 each) Ruby (Shuguang) 12AX7AC5 HG+ or 12AX7AC7 HG+ ($17. So the 7025 is as similar to other 12AX7(A) as any two 12AX7 tubes can be, sonically speaking. Cryo Preamp Tubes-> Cryo 12AT7 / ECC81 / 6201 Cryo 12AU7 / ECC82 Cryo 12AX7 / ECC83 Cryo 12AY7 Cryo 12BH7 / 6350 Cryo 12DW7 / ECC832 Cryo 5751 Cryo 6922 / 6DJ8 / E88CC / 6N1P Cryo 6C45PI Cryo 6CG7 / 6FQ7 Cryo 6H6P. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. Looking for ECC83, 7025 Tubes? You can use any current production 12AX7 tube as 12AX7A, ECC83 or 7025. So that # became obsolete. My current scratch built amp is using old, used 12AX7 tubes, but I recently noticed Fender specifies 7025/12AX7A tubes in their later amps. 5E3 Deluxe Second Gain Stage. Balance Tungsol Russia. We need a mention the fourth member of the Sovtek 12AX7 family. New Ruby Tubes 7025's in stock. They are very close but the gold pin will have slightly less gain in the mids. 12AX7 A built according to military regulations. Electro-Harmonix 12AX7EH Preamp Tube The Electro-Harmonix 12AX7EH is a preamp tube that provides high gain with ultra low noise. Vintage 1950-60's 12AX7A is an "updated" lower noise version of 12AX7 It has to do with the way the heater is designed. It's just that an NOS 12AX7A tube is considered to be premium over the 12AX7. GE used/tested 7025 $25. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. I can't really offer much help on the new production tubes, but I do know my way around NOS tubes pretty good. 12ax7wa Amperex. ECC81 is 12AT7 medium gain pre-amplifying double triode. 12AX7 tube is the most common preamp tube today. EUR 70,00 +EUR 8,45 spedizione; 12ax7 ecc83 5751 12AX7 12ax7a 6072 7025 m. Review - Mullard CV4004 / 12AX7 Reissue. Home > Pre Tubes > 12AX7 ECC83 ECC803S E83CC 7025 CV4004 CV492 CV4035 M8137 M8214 6057 6681 > Tungsram ECC83 12AX7 - MINT NOS NIB Rare August 1963 Industrial Grade Welded Plate Tubes - Red Serial No. Re: 12AX7 vs 7025 for V1? Sat, Dec 29, 2007 1:31pm I can't tell hoe the new preamp tubes are working because the amp has some underlying problems that I am trying to fix that are not tube related. Peavey 5150 Tube Set, JJ Tubes (x4 6L6GC, x5 12AX7), Apex Matched. Interchangable tubes: 12AX7 12AX7A ECC83 7025. Sovtek 12AX7-LPS, balanced triodes, in every PI position of every amp. The following should be direct substitutions. I compared this tube against an old EI and Telefunken smooth plate and there was very little difference. A modern tube marked "7025" is probably just a run of the mill 12AX7 or at best a 12AX7 that has been tested for noise and microphonics. Thinning out + Selling off many vintage 12AX7 / 7025 / 5687 / ECC83 tubes + 12AU7 / ECC82 / 6189 / 5963 / 12AT7 / 6201 / ECC81 @ $35. 250 Tube prices (visible for members only) #N#ECC83: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse. and 7025 is the industrial name. You can probably request a 12AX7 tube of certain "off spec tolerance" from a tube supplier. The 7025 valve is a low hum and low noise version of the ECC83, but whether you’ll hear the difference is debatable. JJ Electronic ECC83S / 12AX7 / 7025 [15-400-14643] Η λυχνία ECC83S ή 12AX7 ή 7025 είναι μία διπλοτρίοδος υψηλής ενίσχυσης τάσης με βάση 9 pin τύπου Noval (B9A). I have the manual and it states that there are 4 tubes on the main board. 12AX7, 5751 and 7025 tube reviews by John Templeton. You can beat the crap out of it and it will still go! Interesting notes: I have heard that ECC803S tubes (12AX7's on Steroids) are great for guitar amps because they have a spiral filament for reduced. New & NOS tubes from Tung-Sol, Electro-Harmonix, JJ & more!. Sign in to follow this. La désignation industrielle est en 4 chiffres, comme 7025 pour la même lampe ! Haut : Ced777 Vintage Méga utilisateur Inscrit le: 19 Aug 03 Localisation: Paris # Publié par Ced777 le 07 Nov 04, 06:07 pm. In many cases, these tubes are interchangeable and can easily be swapped. Vintage European and US 12AX7, ECC83, 5751, 7025, CV4004, CV492, and M8137 tubes in stock now, fully tested and guaranteed. The Mullard 12AX7 is a new sensor re-issue, and has been said by some of our customers to warm up the amp, and tame harshness. Re: Fender preamp tubes 7025 vs 12AX7 Right, in the 50ies those 7025 had a different heater/cathode design, later on the 7025 was simply a selected and tested item. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. The gain is the same. It was designed for use in high fidelity audio circuits. 5751 Sylvania. Because the 12AX7 is so common, it's more sought after and as a result old stock models are more expensive. They are rare, coveted and sound even better than the Russian tubes. groove tubes stp-g - v2 = 12ax7 / 7025 vs 12ay7 Le Groove Tubes STP-G dont le son est très sympa, mais si ont déclenché le "Gain on" (qui ajoute en fait une étape tube / gain (principe de Boogie MK1)), je pense qu'il y a trop de gain!. It has two identical triodes both of which have a high voltage gain. If this tube is still too "smooth" or mellow in your amp, I'd start looking at electrolytic bypass caps and main filter caps feeding these 12AX7. What is the difference between any of these three vacuum tubes? The earliest mention of the 7025 I found was mid 1958. RCA 7025: Standard RCA vacuum tubes are available in large quantities on eBay. Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type. Played clean the TAD 7025 WA delivers a warm liquid tone which is very responsive to dynamic playing. 0:00 jj-ecc83s 2:30 ge-7025 トライオードの、ge6550・5極管接続シングルアンプの、電圧増幅管を交換、音の違いを比較してみました。 最近のメーカー製. Rock Icon: Joined: Tue Jun 29, 2010 1:20 pm Posts: 9638 Location: Indiana Frankly, there is a bit of romanticizing about the "better" older tubes, NOS or not. They are interchangeable, though the 5751 has a gain rating that's less than the 12AX7. For some reason a Telefunken 12AX7 ribbed plate sounds better in a Pioneer SX-34. Note that the modern Sovtek 12AX7WC is actually a pretty good valve. 7025 compared to the 12AX7 are the better tubes and have much higher standards. The ECC83 Gallery 12AX7 E83CC ECC803S 7025 : 5751 CV4004 CV492 B339 : The ECC83 is still the most important preamp and driver tube. The right amount of clean gain for bass IMHO. The tonal characteristics were a bit different too but not sure if. 12AX7 Tubes. So do some of the Chinese 12AX7s. Problem is that most current tube distributors will use '12AX7', ECC83 & 7025 in their descriptions because they are interchangeable in the circuit. Die Verbundröhre verfügt über zwei unabhängige und elektrisch identische Trioden-Systeme in einem Glaskolben. It retains all of the definition and detail that the ECC83S short plate and the ECC803S long plate tubes have but it has. Produktsida Sovtek Bara ECC83 rör av Sovtek but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. The Mullard 12AX7 is a new sensor re-issue, and has been said by some of our customers to warm up the amp, and tame harshness. I modelli più usati negli ampli sono stati le 12AX7 (ECC83), anche nella versione 7025, 12AU7 (ECC82), 12AT7 (ECC81) , 12AY7 (6072). RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. 12df7 Sylvania. The JJ ECC83S / 12AX7 is perhaps the most consistently high gain of all 12AX7's. En réalité, ce sont des lampes qui ont des caractéristiques quasi identiques. Ash HT BKRD. The 7025 came stock in some of the Blackfact Fender amps. Thanks to its design it also peforms with very low noise and microphonics. Any good GE or RCA 12AX7A or 7025 should give you nice, fat tone. 5751s fly just a little under the radar and so you can get good ones at a better price. The 12AX7 is a high-gain (typical gain factor 100), low plate current triode, and is therefore best suited for use in the preamplifier (input and mid-level) stages of audio amplifiers, guitar amps , mic preamps etc. In other respects, the 7025 is similar to the 12AX7. By Marconi Radiotron. We carry a vast number of 12AX7 tubes to help you get the right sonic from your gear. Η συγκεκριμένη λυχνία είναι δημοφιλής σε εφαρμογές ήχου όπου. Sélection et tests maison rigoureux pour fournir le meilleur de ce tube moderne qui sonnera en V2 V3 (Mesa Boogie, Fender) associé en cocktail avec d'autres tubes NOS ou modernes. The published difference is that the 12AX7A can be used with heater circuits wired in parallel and series, whereas the 12AX7 can only be used in parallel circuits. Co istotne, to "zwykłe" 12AX7 EH grają zupełnie inaczej - gorzej od tych na złotych nóżkach. RCA made some good ones but I am getting ahead of myself. The 12AX7 cathode follower, the tone stack, the long-tailed-pair phase splitter, the push-pull power amplifier, and the power supply. This 7025 tube is regarded as the holy grail among the double-triode preamp valves. Electro-Harmonix 12AX7EH Preamp Tube The Electro-Harmonix 12AX7EH is a preamp tube that provides high gain with ultra low noise. The lovely hard rock tone magically appears! Sovtek 12AX7LPS. So the bottom line is that you can use either of these tubes in your Marshall amp. 12AX7A Author: RCA Subject: FP-2012-01-14 Created Date: 1/14/2012 1:36:06 PM. 12AX7 preamp tubes play a remarkable, dynamic role in the creation of the final tone in your vacuum tube amplifier. RCA 7025: Standard RCA vacuum tubes are available in large quantities on eBay. RCA 12AX7: This is a 7025 alternative that delivers less efficient transfers of power but boasts greater noise reduction capabilities. And, remember, the greater the BW, the more "sparkle" and "chime" we're likely to perceive. Corresponds to ECC83 and 7025. Low noise, and a smooth tone. So on the 7025 (ECC83) valve they put the heaters in series and bring out the two ends and a centre tap. A modern 12AX7 with a W prefix means nothing in particular. TWIN TRIODE, 12AX7 datasheet, 12AX7 circuit, 12AX7 data sheet : GEC, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors. They are interchangeable, though the 5751 has a gain rating that's less than the 12AX7. Epiphone Uptown Kat ES Ruby. The JJ ECC83S / 12AX7 is perhaps the most consistently high gain of all 12AX7's. ECC83 vs 12Ax7 Tubes - What is the Difference? One of the more confusing things about tube amps is changing them, especially when there seem to be so many different kinds available. 12AX7 / 12AX7A / 7025 TUNGSOL USA (one of the best US 12AX7 ever made, very dynamic and musical with superb tonal balance, better overall than RCA) TO BUY 12AX7 Tungsol 1951-1960's. Also included in this comparison are direct substitutes for the 12AX7 including ECC83, ECC803, 7025 and 5751. 12AX7 A built according to military regulations. Hello to all forum members. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. After the original 12AX7, additional variants were issued with various industrial numbers (including the 7025) as well the 12AX7A. A bit weird as the tubes seemed fine when switched into another amp for testing Anyway got a tech to check it out and he replaced them and all good now. In other respects, the 7025 is similar to the 12AX7. Create your own unique tone and love your gear again!. This represent standard construction / quality / hum / micrphony etc. was the originally supplied tube to Fender in the 1950s if you want to be period-correct. Beautiful tubes ECC83 is the british name for a 12AX7. • 7025/ECC83 equivalent Strongly committed to quality manufacturing, Tung-Sol tubes have always been known for their reliability and great tone. 12df7 Sylvania. It is the Sovtek 12AX7LPS. The heater current is slightly different, 175ma vs 150 for 12AX7(series heater operation) I tried a 5751 in a series string and it flared brightly while the 150ma tubes just set there a few seconds befor heating and equalizing the string. The main event is the "Battle of 12AX7" which is something I have tried to organise for the last two months or so. Lots of gain with a rather low noise floor. The 12AT7 is used as a driver tube in many old Fender amps. 7025/ECC83 equivalent Have a question? Find answers in product info, Q&As, reviews There was a problem completing your request. La 12AX7 fue desarrollada para reemplazar al doble triodo de base octal 6SL7 para ser usada en. The 12AX7 was made for quite a while. The 5751 version of the 12AXY tube is a military version that is rugged and has a lower Gain of 70. 12ax7 ecc83 5751 7025 12AX7 tube 7025 12AX7A ECC83 m-pair made E. ) sound nice. the 7025 is supposed to be a premium version or quieter running 12ax7, but it is spec. Salve possiedo un ampli fender super twin rewerb, e da voi ho acquistato tutte le valvole per fare un chek up totale (7025 WA tad hi,12at7,7025 S premium,6L6WGC-STR GE,6C10,6CX8). Thus, substituting a 5751 for a 12AX7 (or ECC83, 7025, etc. 12AX7A/7025? Funny how when musical gear was just made better (ie. A Comparison of Current Production 12AX7 Tubes by Kurt Prange RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. They are marked "COMPUTOR", and were made for mainframe computer arrays, back when computers took up whole rooms. Generally, many companies had their own designations and suffixes and prefixes to make their product stand out. In fulfilling its stated purpose (reduced hum and noise), it was in direct competition with the 7025. Two of the ECC83 / 12AX7 and two of the 7025's. Make Offer - Amperex BUGLE BOY 12AX7/ECC83 Round Getter/Grey Plates STRONG Tested Vacuum Tube RARE Amperex 12ax7 ECC83 Bugle Boy 6J Mc2 D-foil Getter 12ax7a 7025 10m Ecc803s $165. The new Sovtek 12ax7LPS is supposed to be the modern equivalent of the 7025. Ultra-low noise, but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. Radio tubes are valves. Produktsida Sovtek Bara ECC83 rör av Sovtek but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. There are many versions of the 12AX7 tube and many brands. If someone could take a look at it and tell me if The RCA 7025 was 12AX7 with a different. Standard Delivery Times. 맨 왼쪽에 Amperex bugle boy는 교과서 같습니다. The tubes have well balanced triode pairs and a very even flat response. The tube would work but not well. Fue desarrollada en 1946 por los ingenieros de RCA [1] en Harrison, Nueva Jersey, con el número de desarrollo A-4522. I run 5751s in my 12AX7 slot and can hardly discern less volume. I have the manual and it states that there are 4 tubes on the main board. Review - Mullard CV4004 / 12AX7 Reissue. I modelli più usati negli ampli sono stati le 12AX7 (ECC83), anche nella versione 7025, 12AU7 (ECC82), 12AT7 (ECC81) , 12AY7 (6072). google "12ax7 vs 7025": get responses like: In the old days the 12AX7 and 7025 were different quality tubes. In an amp you can replace a 12AX7 with a 7025 but not vice versa. Les références les plus connues sont la 7025 et la ECC83. Tube Depot carries a selection of 12AX7 / ECC83 / 7025 / CV4004 Pre Amp Vacuum Tubes. A center-tapped heater permits operation of the tube. The standard is VERY high quality/. JCDenton6 wrote:Lots of guys use a Tung-Sol in V1 of their amps for a little more clarity, then go with Shuguang 12AX7-B in the rest of the positions to ramp up the gain and retain clarity if you play hard rock/metal. 12AX7 / ECC83 / 7025 tubes. This is not to say the non 7025 tubes are noisy. To reiterate: 5751 is a lower gain sub for 12AX7, and 7025 is a low-noise 12AX7 (same spec). Thus, substituting a 5751 for a 12AX7 (or ECC83, 7025, etc. Co istotne, to "zwykłe" 12AX7 EH grają zupełnie inaczej - gorzej od tych na złotych nóżkach. European code for 12AX7 high-gain twin-triode. d similar / same as the 12ax7. 호환관이라고 했는데 6681은 12ax7하고 동일합니다. Tube 12AX7 or Röhre 12AX7 ID3730, Double Triode, Noval, B9A and Audio Frequency shown. Su ganancia es alta entre las ECC83/12AX7, suena radical en Marshalls clásicos y vibrante en Fenders, y aporta definición y detalle extra en preamps hi-gain. It's just that an NOS 12AX7A tube is considered to be premium over the 12AX7. In case this tube is currently not available, we recommend as replacement tube: RT080 Q: When does a preamp tube become a Premium Selected tube?. Παράδοση έως 30 ημέρες. Par contre, selon ce que tu as mis, et l'endroit où tu l'as placé, tu auras peut-être un son légèrement différent. The ECC83 is a mid gain tube and will have less gain than a 12AX7 (ECC803S). I was hitting it with finger quite hard with no audible effects 🙂 Very smooth sound, not as smooth as RCA 12ax7 Long Gray Plates, but quite close. La désignation industrielle est en 4 chiffres, comme 7025 pour la même lampe ! Haut : Ced777 Vintage Méga utilisateur Inscrit le: 19 Aug 03 Localisation: Paris # Publié par Ced777 le 07 Nov 04, 06:07 pm. Because of the high gain, 12AX7 in V1 has a lot of effect on sonics. The tonal characteristics were a bit different too but not sure if that is a direct result of the tubes or the tubes interaction with the other circuitry. the 7025 is supposed to be a premium version or quieter running 12ax7, but it is spec. Also, one need never use all one type of tube in a preamp (like all 7025, for example), nor do they need to be the same manufacturer's tubes. The ECC83 Gallery 12AX7 E83CC 7025 ECC803S : 5751 CV4004 CV492 B339. These are usually the best choice for demanding hi-fi applications, although the premium brands and blackplate types also have very low noise. No microphonic issues even with the most sensitive preamps. Tra l' altro la valvola 6C10 per me era introvabile. By Sylvania. The 12AT7 is used as a driver tube in many old Fender amps. And, remember, the greater the BW, the more "sparkle" and "chime" we're likely to perceive. La 12AX7 o ECC83 es una válvula doble triodo de base noval B9A con un elevado grado de ganancia. Review - Mullard CV4004 / 12AX7 Reissue. It utilizes a medium length ribbed plate design that is much like the old Amperex and Brimar European designs. Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. 12ax7/ecc83gen Super premium pins high-gain twin triode, faithfully reissued from the original Genalex Gold Lion ECC83/B75. Either the Tianjin ECC83 or any of the China 7025 tubes is preferable to the Psvane… and the Tube Store "Preferred Series 7025" is a GREAT tube for only $25; I prefer it by far to the modern New Sensor Mullard re-issue 12AX7 by a huge margin and even favor it over the expensive Gold Lion 12AX7 reissue tubes in certain applications. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments. RCA made some good ones but I am getting ahead of myself. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. Order tubes BEFORE they need to be replaced, and save the gig. As the title says is there really any physical difference between 12AX7, 12AX7A and 7025 tubes? I know that a 12AX7 tube is the original design, a 12AX7A tube is a lower noise version of the original 17AX7 and so is a 7025 tube, but are they really made differently?. d similar / same as the 12ax7. Played clean the TAD 7025 WA delivers a warm liquid tone which is very responsive to dynamic playing. Lots of gain with a rather low noise floor. In my experience it really enriches the mid tones. It was released for public sale under the 12AX7 identifier on September 15, 1947. ECC83: RTT 1974 (Franzis) 13. It's also more heavy duty so it can take a beating. Sovtek 12AX7 WB / 7025 Cryo Matched Pair (2) $38. 5751: Military version/drop in replacement for the 12AX7, but is actually different. ECC83/ 7025-HARMA DR270-Hi Gain Harma Valves A specially selected super gain version of the Harma ECC83/7025 for the guitarist who wants the maximum gain whist In stock £18. The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible. The chain of 12AX7's start to break up. The 7025 was a more robust version of the 12AX7, often used in military applications (aircraft comm, radar, etc ). 7025 경우도 같은건데 생산업체나 시기에 따라서 다르게 구분한 경우도 있습니다. Rock Icon: Joined: Tue Jun 29, 2010 1:20 pm Posts: 9638 Location: Indiana Frankly, there is a bit of romanticizing about the "better" older tubes, NOS or not. I have not tried 7025 Long. The 12AT7 is used as a driver tube in many old Fender amps. The main event is the "Battle of 12AX7" which is something I have tried to organise for the last two months or so. Thanks to its design it also peforms with very low noise and microphonics. Please try your search again later. Tube Question - 12AX7 vs. Sovtek 12AX7-LPS, balanced triodes, in every PI position of every amp. Slightly taller than the Ruby & Tubestore 12AX7. 같은 관에 12ax7, 7025 모두 각인된 경우도 많구요. 진공관 찾으러 박스도 몇번 뒤지고, 친구네서 하나 얻어오고, 소리전자 중고장터에서 하나 샀습니다. Displaying products 1 - 13 of 13 results: Show: Sort: Genalex Gold Lion 12AX7 / ECC83 / B759 - gold pins. My current scratch built amp is using old, used 12AX7 tubes, but I recently noticed Fender specifies 7025/12AX7A tubes in their later amps. For example, owners of older 12AX7 gear could plug-and-play the new low-noise tubes. Interchangable tubes: 12AX7 12AX7A ECC83 7025. After the original 12AX7, additional variants were issued with various industrial numbers (including the 7025) as well the 12AX7A. Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. Harmonically rich, with a detailed low end and a warm high end. 12AX7, 7025, ECC83 - zamienniki i opinie Zaloguj się, aby obserwować tę zawarto Ja stosuję Electro-Harmonixy 12AX7 Gold Pin - wg mnie są rewelacyjne. New Ruby Tubes 7025's in stock. And unlike the 6EU7, the 7025 was a direct substitute for the 12AX7 in ALL cases. 12ax7 호환관 - 5751, 6681, 7025. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. EUR 69,00 +EUR 8,45 spedizione; 1x 12ax7a = 5751 ecc83 USA NOS Tube Tubo Valvola. ECC83: RTT 1974 (Franzis) 13. TAD RT010 Tube 7025 Highgrade. It hits the numbers pretty well for a new production valve. Rock Icon: Joined: Tue Jun 29, 2010 1:20 pm Posts: 9638 Location: Indiana Frankly, there is a bit of romanticizing about the "better" older tubes, NOS or not. Lots of gain with a rather low noise floor. Elektronka do předzesilovače typu ECC83 / 12AX7. The TAD™ 7025 Highgrade is a miniature, high-mu twin triode for the most demanding amp stages. I have read that eventually the specs of the 7025 were adopted for 12AX7's, and that the 7025 nomenclature eventually dissapeared for new production in late 60's. Some of the "obscure" 12AX7's are: Preferred Series 7025 ($24 each) Any TAD, but mainly the 7025S ($25 each) Ruby (Shuguang) 12AX7AC5 HG+ or 12AX7AC7 HG+ ($17. There are many versions of the 12AX7 tube and many brands. Groove Tubes 7025 (black plate E! 12AX7): This tube is DA THING! The sexiest midrange I've ever heard, hope the new shiny plates are just as good. " From the RCA spec. ) sound nice. To reiterate: 5751 is a lower gain sub for 12AX7, and 7025 is a low-noise 12AX7 (same spec). The 5751 has identical plate resistance to the 12AX7, but the gain is 70 compared to 100 for. GE used/tested ANOS 12AX7 & 12AX7A ( 1960s Gray Plates ) $ 20. The only claimed changes are lowered hum, lowered noise and microphonics (in some sheets). No microphonics issues at all. Let's draw the load lines for the 5E3 Deluxe second gain stage (V2A). The new Sovtek 12ax7LPS is supposed to be the modern equivalent of the 7025. If you are looking to upgrade the tubes in your amp, 12AX7 in V1 where you want to start. 12AX7 and 5751 (equiv. 3vをかけると正常に動作します、ソケットの配線替えが必要です、 (6. Audio tubes for guitar amplifiers and audiophile equipment. The Europeans had this too and called this specials designs E83CC (simply a mix of the number and capitals). 12AX7 TUNGSRAM HUNGARY (these typically have very low noise and are under-rated 12AX7's, copper grid posts) TO BUY 12AX7 Tungsram. Salve possiedo un ampli fender super twin rewerb, e da voi ho acquistato tutte le valvole per fare un chek up totale (7025 WA tad hi,12at7,7025 S premium,6L6WGC-STR GE,6C10,6CX8). Ultra-low noise, but also approximately 3 dB less gain than the normal 12AX7 (RT001) - recommended for problems with microphones. Harmonically rich, with a detailed low end and a warm high end. So that # became obsolete. After the original 12AX7, additional variants were issued with various industrial numbers (including the 7025) as well the 12AX7A. ECC81 is 12AT7 medium gain pre-amplifying double triode. A Comparison of Current Production 12AX7 Tubes by Kurt Prange. Really just depends on the tube and more importantly the tube compared to what you have currently. 12AX7, 7025 and 5751 Tubes. Re: Fender preamp tubes 7025 vs 12AX7 Right, in the 50ies those 7025 had a different heater/cathode design, later on the 7025 was simply a selected and tested item. La 12AX7 o ECC83 es una válvula doble triodo de base noval B9A con un elevado grado de ganancia. Peavey 5150 Tube Set, JJ Tubes (x4 6L6GC, x5 12AX7), Apex Matched. So a NOS 12AX7 with a suffix starting with 'W' is a military valve. Compared to the JJ ECC83-S this tube sounds a little more eager to hit the midrange. The Mullard 12AX7 is a new sensor re-issue, and has been said by some of our customers to warm up the amp, and tame harshness. Same grade as Ruby 12AX7ACZ HG. Also known as the Groove Tubes ECC83-S and Ruby 12AX7ACZ HG. We carry all of the major brands in NOS, vintage and New Production vacuum tubes. So do some of the Chinese 12AX7s. Epiphone Uptown Kat ES Ruby. EUR 69,00 +EUR 8,45 spedizione; 1x 12ax7a = 5751 ecc83 USA NOS Tube Tubo Valvola. The gain is the same. Lots of gain with a rather low noise floor. An exact replacement. RCA 12AX7: This is a 7025 alternative that delivers less efficient transfers of power but boasts greater noise reduction capabilities. Review – Mullard CV4004 / 12AX7 Reissue. This is an excellent valve to improve the sound of bland and thin sounding amplifiers. Standard Delivery Times. 6681 Disclaimer Submit a tube. In my experience it really enriches the mid tones. He replaced the blown 7025 with a 12AX7 and when questioned he said they are exactly the. 12ax7 vs 12ax7a Showing 1-23 of 23 messages. This has a spiral wound filament which reduces hum and noise. The 5751 version of the 12AXY tube is a military version that is rugged and has a lower Gain of 70. En réalité, ce sont des lampes qui ont des caractéristiques quasi identiques. Make Offer - Amperex BUGLE BOY 12AX7/ECC83 Round Getter/Grey Plates STRONG Tested Vacuum Tube RARE Amperex 12ax7 ECC83 Bugle Boy 6J Mc2 D-foil Getter 12ax7a 7025 10m Ecc803s $165. I have not tried 7025 Long. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. Compared to the JJ ECC83-S this tube sounds a little more eager to hit the midrange. 12AX7 / ECC83 /12AX7A lampes testées tested tubes. • 7025/ECC83 equivalent Strongly committed to quality manufacturing, Tung-Sol tubes have always been known for their reliability and great tone. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 - same valve, just a different name. RCA 12AX7: This is a 7025 alternative that delivers less efficient transfers of power but boasts greater noise reduction capabilities. NOS in original boxes labeled as Motorolla and Truetone. ECC83/ 7025-HARMA DR270-Hi Gain Harma Valves A specially selected super gain version of the Harma ECC83/7025 for the guitarist who wants the maximum gain whist In stock £18. The following should be direct substitutions. GE used/tested 7025 $25. Karel De Reus † #N#ECC83: Peter Roggenhofer. It means, shuguang 12AX7 was divided in to 12ax7, 12ax7 b and 12ax7m these three types. If you are looking to upgrade the tubes in your amp, 12AX7 in V1 where you want to start. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. Rock Icon: Joined: Tue Jun 29, 2010 1:20 pm Posts: 9638 Location: Indiana Frankly, there is a bit of romanticizing about the "better" older tubes, NOS or not. Corresponds to ECC83 and 7025. DOUBLE TRIODE ECC83S is 12AX7 high gain pre-amplifying double triode. Su ganancia es alta entre las ECC83/12AX7, suena radical en Marshalls clásicos y vibrante en Fenders, y aporta definición y detalle extra en preamps hi-gain. Thinning out + Selling off many vintage 12AX7 / 7025 / 5687 / ECC83 tubes + 12AU7 / ECC82 / 6189 / 5963 / 12AT7 / 6201 / ECC81 @ $35. TV repairmen did quite well replacing tubes back in the day. Mullard 12AX7 reissue, in V1 or V2 in several amps, only if they can be kranked enough, otherwise they can sound hi-fi and sterile. These are usually the best choice for demanding hi-fi applications, although the premium brands and blackplate types also have very low noise. In the mid 60's tube manufacturer's started making the 12AX7's to 7025 specs. RCA 12AX7's seem to be very popular for electric guitar. 12AX7 is the U. I run 5751s in my 12AX7 slot and can hardly discern less volume. It hits the numbers pretty well for a new production valve. Thus, substituting a 5751 for a 12AX7 (or ECC83, 7025, etc. The heater current is slightly different, 175ma vs 150 for 12AX7(series heater operation) I tried a 5751 in a series string and it flared brightly while the 150ma tubes just set there a few seconds befor heating and equalizing the string. 25 mA/V è il minimo richiesto per un tubo nuovo. The quietest 12AX7-family tube we have are pairs of NOS 1960's Philips Amperex organ grade production that apart of being dead quiet their sound is really great, smooth with deep bass with real authority and controlled, warm mids and highs and not overly sweet. The ECC83 is a mid gain tube and will have less gain than a 12AX7 (ECC803S). RCA and Sylvania first introduced the 12AX7 to the world in the late 1940's. It kinda dependsyes Ecc83/7025/12ax7/12ax7a are different designations (euro/industrual/US) for twin triodes with a gain multiplier of 100. 12ax7 vs 12AT7 vs 7025 etc. ECC83: RTT 1974 (Franzis) 13. 진공관 찾으러 박스도 몇번 뒤지고, 친구네서 하나 얻어오고, 소리전자 중고장터에서 하나 샀습니다. Les références les plus connues sont la 7025 et la ECC83. I swear, the 12AX7 and all of its mutant cousins probably has more mystique in its history than any other low level audio tube. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs. If you look closely at all the sheets, all conditions listed for the 12AX7 are identical to the 12AX7A and the 7025. I can't really offer much help on the new production tubes, but I do know my way around NOS tubes pretty good. The tonal characteristics were a bit different too but not sure if. Either the Tianjin ECC83 or any of the China 7025 tubes is preferable to the Psvane… and the Tube Store "Preferred Series 7025" is a GREAT tube for only $25; I prefer it by far to the modern New Sensor Mullard re-issue 12AX7 by a huge margin and even favor it over the expensive Gold Lion 12AX7 reissue tubes in certain applications. Order tubes BEFORE they need to be replaced, and save the gig. Jackson Pro Dinky DK Mod. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). By Sylvania. 7025 compared to the 12AX7 are the better tubes and have much higher standards. They are marked "COMPUTOR", and were made for mainframe computer arrays, back when computers took up whole rooms. The 7025 valve is a low hum and low noise version of the ECC83, but whether you’ll hear the difference is debatable. It's a very common gain stage that's used in many amps. I love and appreciate tube based audio gear and own sixteen pieces of tube gear between my two reference systems. JJ Electronic ECC83S / 12AX7 / 7025 [15-400-14643] Η λυχνία ECC83S ή 12AX7 ή 7025 είναι μία διπλοτρίοδος υψηλής ενίσχυσης τάσης με βάση 9 pin τύπου Noval (B9A). 12ax7 호환관 - 5751, 6681, 7025. La 12AX7 o ECC83 es una válvula doble triodo de base noval B9A con un elevado grado de ganancia. Flying Leads Plug&Play CV4034 - Premium 12AU7 ECC82 E82CC ECC802S 5814 6189 6680 CV491 CV4003 CV4113 CV4122 F6067 B749 M8136 13D5 7316 type. We carry all of the major brands in NOS, vintage and New Production vacuum tubes. That's a pretty nice compliment. And unlike the 6EU7, the 7025 was a direct substitute for the 12AX7 in ALL cases. 12AX7, etc. The Europeans had this too and called this specials designs E83CC (simply a mix of the number and capitals). Same grade as Ruby 12AX7ACZ HG.
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