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Sep 15,  · 12AX7 vs 12AT7 vs 12AU7 Differences Explained The biggest difference between these power tubes is the amount of gain they will provide The 12AX7 has a gain factor of 100, while the 12AT7 has 60 The 12AU7 has the smallest, at just The lower gain of the 12AT7 and 12AU7 also allows them to have a higher headroom, which can provide a warmerMar 10, 14 · 12AX7, 7025 and 5751 Tubes 12AX7, 5751 and 7025 tube reviews by John Templeton These reviews are a vital resource for learning about manipulating your amplifier's tone through better tube choicesJun 27, 18 · Recording using an RME Fireface 400 and Pro Tools 10Signal chain as Follows Fender Jazzmaster HH Blacktop Special Edition, MIM Tone knob 10, Volume Kno

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What are the best 12ax7 tubes-ECCS 12AX7, 7025 AF DOUBLE TRIODE ECCS is 12AX7 high gain preamplifying double triode Thanks to its design it also peforms with very low noise and microphonics Harmonically rich, with a detailed low end and a warm high end DOWNLOAD PDFA 12AT7 is a lower gain tube from a 12AX7/7025/ECC As SD97 noted a 7025 was a military tube In the mid 60's tube manufacturer's started making the 12AX7's to 7025 specs So that # became obsolete The 12AT7 is used as a driver tube in many old Fender amps

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Jul 29, 05 · Jul 31, 01 Messages 2,8 In the old days, a 7025 was a 12AX7 that was selected for it's lower noise level Other than being quieter, they are no different from a "regular" 12AX7, ECC, etc Jul 28, 05 #412AX7 / ECC / 7025 RCA developed the 12AX7 tube in the 1940s for general purpose amplification Today, 12AX7 is the most common preamp tube used in guitar and audio amp due to its high amplification factor (mu) We carry a large selection of 12AX7 tubes to help you get the right sonic from your gearMar 29, 10 · Also, as tube manufacturing became refined, the 12AX7A became much quieter So much in fact that a lot of 12AX7A's were labeled 7025's (a very quiet version of the 12AX7) So the bottom line is that you can use either of these tubes in your Marshall amp It's just that an NOS 12AX7A tube is considered to be premium over the 12AX7

Oct 06, 19 · The 7025 was a more robust version of the 12AX7, often used in militaryResponse In the old days the 12AX7 and 7025 were different quality tubes 12AX7 is the US and 7025 is the industrial name 7025 is higher in gain and a bit brighter then the 12AX7 It's also more heavy duty so it can take a beatingJan 13, 15 · The first audio tube produced with this technology was the 12AY7 in 1953 Of course, the 12AX7 predates the invention by three years The 7025 and 12AX7A were 12AX7's with the helically wound heater incorporated for its lower noise benefits

Sovtek 12AX7WB/7025 Vacuum Tube Both the Sovtek 12AX7WA and 12AX7WB vacuum tubes almost sound the same though there is a perceptible difference in gain To put it in perspective, the 12AX7WB has a little more gain in comparison to the 12AX7WA tube1960's and 70's types were 12AX7A's or low noise 7025's which had ribbed gray plates 7025's were specially designed to have low hum and noise characteristics and is the choice among many HiFi types This is not to say the non 7025 tubes are noisy They are normally very quiet, too RCA 12AX7's seem to be very popular for electric guitarSovtek 12AX7LPS We need a mention the fourth member of the Sovtek 12AX7 family It is the Sovtek 12AX7LPS This is a long plate valve so has a very rich tone

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Feb 27, 19 · The chain of 12AX7's start to break up As a result the El34's in the Laney example get a big final push from the preamp stages The lovely hard rock tone magically appears!You get a real USA made tube that is built like a tank, has great tonal balance, and is one of the lowest price 12AX7 tubes we offer Matched pairs are $ per pair $5000 out of stock 7025/6681/12AX7 Premium industrial grade, Magnavox, CBS, or GE, plus other vintage USA made brands New Old Stock in original boxes and whiteboxGray vs black plate I am mainly going to cover 12AX7/ECC and 5751 type preamp tubes and EL84/6BQ5 power tubes since these are some of the most popular and in demand tubes for guitarists and audiophiles I will also get into tube dampers, and how these dampers can greatly improve tube sound and performance in guitar and audio applications

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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 Also included in this comparison are direct substitutes for the 12AX7 including ECC, ECC803, 7025 and 575112AX7 (also known as ECC) is a vacuum tube that is a miniature dualtriode 6AV6 with high voltage gainDeveloped around 1946 by RCA engineers in Camden, New Jersey, under developmental number 522, it was released for public sale under the 12AX7 identifier on September 15, 1947 The 12AX7 was originally intended as replacement for the 6SL7 family of dualtriode amplifier tubesJan 19,  · ECC was the European designation for the 12AX7 the tubes were functionally identical 7025 was the designation used for a heavy duty version of the 12AX7 Some people refer to this as "military grade" which is a misnomer because for the most part, the US military specified heavy duty tubes

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Preferred Series 7025 / 12AX7 A great sounding 12AX7 tube type that reminds me a little more of the ECC that EI made in the old days That's a pretty nice compliment I compared this tube against an old EI and Telefunken smooth plate and there was very little differenceMay 07, 15 · If you are going with short plate RCA the 7025 have better tone over the 12AX7A (which is still a fine tube) The differences are subtle but the 7025 is better I don't know which "place" says a 12AX7A is better than a 7025ECC/ 7025ELECTRO HARMONIX Electro Harmonix Electro Harmonix 7025 is a low noise, low microphonic version of the 12AX7 that meets all specifications required for In stock £1250 Buy Now ECC/ 7025HARMA DR250 Harma Valves The Harma 7025 STR DR250 is a close sounding recreation of the famous USA made 7025 valveThe valve supplies a tight

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May 01, 02 · The 7025 is a low noise version of the 12AX7A It was designed for use in high fidelity audio circuits This is according to the RCA receiving tube manual I can't really offer much help on the new production tubes, but I do know my way around NOS tubes pretty good Any good GE or RCA 12AX7A or 7025 should give you nice, fat toneDec 11, 07 · Hello all, I was wondering about your opinions on the 12AX7type preamp tubes My current scratch built amp is using old, used 12AX7 tubes, but I recently noticed Fender specifies 7025/12AX7A tubes in their later amps The 7025 and 12AX7A data sheets both say "For highfidelity audioamplifer applications critical as to noise and hum"Nov 13, 19 · The 7025 is a name that was given to an upgraded version of the 12AX7 in the 1960s The upgraded version was quieter and more robust than the standard 12AX7 of that time They were less microphonic and just an all around better tube A few years later, manufacturers of the 12AX7 began to make their tubes in the same manner as the 7025

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12AX7 Comparison of Current Made Tubes All 12AX7 tubes have an amplification factor (μ) of 100 ("highmu") Ideally, every 12AX7 should yield the same gain when placed in the same circuit However, in reality there are comparative gain differences among 12AX7s The purpose of this comparison is simply to provide guitar players with a frame ofMay 18, 19 · Changing tubes in an amp can be a particularly challenging experience, especially since there seem to be so many of them In this article, we'll concentrate on the question of the ECC vs 12Ax7 tubes The truth is, there is no difference at all between them, and each one is interchangeable with the other 12Ax7 (Fig 1) is merely the AmericanDescription NOS RCA 12AX7 ECC TUBE for Fender Pro price is $125 each tube ($250 pair) ULTRALOWNOISE FREE NEW OLD STOCK!

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Feb 16, 21 · Fender Twin Reverb amplifiers use four output tubes, of the 6L6GC type They use six preamp tubes, consisting of four 7025/12AX7A types and two 12AT7 types The 12AX7A/7025 is a lowernoise version of the 12AX7 12AX7A/7025 RECOMMENDED BY FENDER IN THEIR ORIGINAL TUBE COMPLEMENTDec 19, 17 · I think the 7025 designation was for 12ax7 tubes made with spiral filaments which could reject hum better in circuits that use AC heater current There are spiral filament 12ax7s made today like the New Sensormade Sovtek 12ax7LPS not labelled 7025 chervokas, Dec 17, 17 #2Mullard 12AX7 / ECC long plates, dual post getter, phono grade Price $ This very rare 1959 Mullard 12AX7 / ECC tube has long plates with copper grid posts and a dual post round getter (f92 series) The white label has the early shield logo and the Blackburn factory code is etched in the glass Tube tests as new

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Http//wwwthetubestorecom/Tubes/12AX7ECCTubeTypes/PreferredSeriesAX7The Preferred Series 7025 is a high quality 12AX7 tube type This tube isMar 10, 16 · The Preferred Series 7025 is a great sounding 12AX7 tube type that reminds me a little more of the ECC that EI made in the old days That's a pretty nice complimentOnly marking is "G7 L G7"), Sovtek 12AX7WXT tubes I "listened" with the volume knob on the amplifier at 2 different positions at 50% (medium) and at 100% (full) RAW DATA

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Dec 12, 12 · Warm, fat tone that is signature of the Chinese tubes, these are selected Shuguang 9th generation 12AX7's Great for all musical genres Not graded or guaranteed for any V1 spot Also known as the Groove Tubes 12AX7C, and Ruby 12AX7AC5 Order ShuguaPrice = for a pair of 2 tubes!This CK5755 is a doubletriode made by Western Electric (USA) for Raytheon It has same specs as 12AX7A / ECC / 7025 but with different pinout for Pin 23 and 68 (see data sheet)

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Replaces 12AX7, 12AX7A/WA/WB/WC, ECC, 7025, SPAX7A The TAD HIGHGRADE Selection is especially recommended for use with demanding input stages (V1) and for all applications demanding the best selection for extremely low microphony 7025 / ECC / 12AX7A type tubesThe Tube Store 7025 hummed big time (because of my amp, not the tube IMHO) The TAD 7025S worked perfectly!The 12AX7 is by far the most common out of all preamp tubes Also known as the ECC or the 7025, it is a dual triode tube that has the highest voltage gain of all preamp tubes, with a mu of 100 Widely used across guitar amplifiers and hifi applications For less gain, you can replace a 12AX7 with 5751, 12AT7, or a 12AY7

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7025 is a low microphony noise version of 12AX7 7025 is a 12AX7 that doesn't pick up vibration noise Vintage Fender amps used 7025 in high gain stages to avoid unwanted feedback and noise Current production 12AX7 tubes are always used in audio or guitar amps, and they are designed to be equal to or better than the original 7025 tubesI listened to EI 12AX7, GE 12AX7WA, Westinghouse 12AX7, Sylvania 12AX7, RCA 12AX7, JJ ECC, Sovtek 12AX7WB, Ruby 7025STR, German (perhaps Siemens?Jun 08, 18 · The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes In many cases, these tubes are interchangeable and can easily be swapped We will take a look at why you might, or might not, want to swap out these different types of tubes The 12AX7 The 12AX7 is by far the bestknown preamp tube among guitar

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NOS Brimar CV4004/ECC/12AX7 $9500 Price $9500 Matching/Balancing No Matching, $9500 Grade 2 (higher than average microphonics) Not recommended for V1 but good for phase inverters, cathode followers, tremolo tubes, $4500Tested en matched on Amplitrex AT1000 Matching ADAPTERS from 12AX7 ECC to 5755 available!The TAD is VERY quiet, cleaned up the low end bloom and added warmth and more balance /presence to the highs The right amount of clean gain for bass IMHO Slightly taller than the Ruby & Tubestore 12AX7

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Dec 16, 12 · None The 7025 is allegedly a lownoise 12AX7 The best 12AX7 is probably quieter than the noisiest 7025 but it's the same tubeShop our great selection of 12AX7, 12AX7A, 12AX7EA, 7025, ECC, ECC803S, 5751 (low gain), CV492, 7058, 12DF7, CV4004, 39, ECC, M8137vacuum tubes now We carry all of the major brands in NOS, vintage and New Production vacuum tubes Our tubes are always tested, matched and guaranteed Visit us now!Feb 26, 10 · 7058 is a 12AX7 variant made for car radios Mostly, they are RCA manufactured, whatever name is on them (mostly Motorola) Sylvania made some but they are very rare The heaters are designed to work from a car battery, so you have to run them on the series line (126V connected) The centre tap is usually connected, despite what it says on the

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TUBE MUSEUM QUALITY NOS NIB RCA USA NEW IN ORIGINAL BOX 12AX7A = 7025 Made in USA RCA "USA STOPSIGN CODE" 12AX7 rarely seen NOS TUBE Comes with RCA boxTubes marked with both 12AX7 and 7025 are usually low noise as well 5751 Military version/drop in replacement for the 12AX7, but is actually different The 5751 has identical plate resistance to the 12AX7, but the gain is 70 compared to 100 for the 12AX7The 7025 valve is a low hum and low noise version of the ECC, but whether you'll hear the difference is debatable 99% of valve amplifier manufacturers use ECC (12AX7) as the first preamplifier valve so if it's good enough for them

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