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12au7, 12at7, 12ax7은 모두 갖은 핀배열과 비슷한 구조를 갖고 있으며, 다만 증폭도를 다르게 하기 위해 전극의 간격과 그리드의 피치를 달리 한 것이다. 그 중 12AU7은 12A*7 계열에서 증폭도가 12 ~ 15로 가장 낮다.
BRITISH MULLARD 12AU7/ECC82 TUBES 1960's british mullard 12au7/ecc82 quality tested. Lovely warm rich british mullard sound.authentic vintage input valves from the golden age. Made in blackburn lancashire great britain. 12AU7/ECC82 VALVES USA -1960 VINTAGE - TEST STRONG 12AU7/ECC82 made for and used in Conn organs USA.

12au7 vs 12at7

The 12BH7 is like a 12AU7, but has higher power handling capability. I'd recommend selling it to someone with a McIntosh tube amp, an SVT or a headphone amp that uses them as output tubes. In the first two cases, the 12BH7 is the only tube that'll do the job, so it seems to me it would find a better home with folks who can't sub something in ... Aug 02, 2018 · Gain factor of 12ax7 is 100. A 12au7 is 20. It'll sound anemic. Go with 5751's (gain factor of 70) instead.
So, reading the table, the 12AU7 has 0.42 the gain of the 12AY7, and inversely, the 12AY7 has 2.37 the gain of the 12AU7. In general, if you find your amp distorting too much, try moving to a lower-gain tube.
Welcome to the new and improved Vacuum Tubes, Inc. website! We have added a shopping cart for easier ordering and an improved search feature. We specialize in new-old-stock tubes and offer high quality tubes, sockets, capacitors, and other parts.
Apr 30, 2019 · Well, we did Mullard last week so this time, lets look at the Brimar type and date codes, oft seen on valve envelopes in minuscule inked print, but what do they mean? Brimar codes come in two parts separated by a forward slash "/". The first part, of format number-letter-number is the date code where the first number signifies production week of month, the following letter signifies the ...
The biggest shocker was the 12AT7 which went from the bottom to almost equal with the 12AX7. The reason for this is because the tone stack is a fairly low impedance. Even though the Mu of the 12AT7 is nearly half the 12AX7, the plate resistance is much lower so it's not "dragged down" as heavily as the 12AX7.
What is the Difference Between the 12AX7, 12AT7, and 12AU7 Preamp Tubes? Let's take a look at the less glamorous, but equally important type of amplifier tube - the preamp tube. 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.
This 1966 Brimar 12AT7 / ECC81 tube has black wing style plates with copper grid posts and a halo getter. The white print on the glass has Mullard IEC logo and says "Made in England." Tube tests as new with very low noise.
A.F. DOUBLE TRIODE ECC82 is 12AU7 medium gain pre-amplifying double triode. Provides a very smooth sound with well-defined tones suitable for audio and guitar amplifiers.
The ecc82 valve also known as a 12au7 is a low gain preamp valve used in guitar amps and hifi ampliers. The use of this valve will give more headroom and clarity and lower the gain on a over distorted valve amp.
The 12AU7, on the other hand, is described as an "A.F. double triode". Data sheets suggest an upper frequency limit of 30 kHz for the 12AU7/ECC82 and it is not described as a "special quality" device. This contrasts with the 6AB4/EC92 and 12AT7 /ECC81 which are both R.F. devices operating up to VHF frequencies.
2 pieces premium Tungsol 12AU7 preamplifier vacuum tubes. 2 pieces premium Tungsol 12AT7 driver vacuum tubes. 2 pieces premium Tungsol 12AX7 driver vacuum tubes. DAC Specifications. Main IC Chip USB Power Isolation ADMU4160. USB Receiver TE7022 24BIT/96K. SPDIF Receiver CS8416 24BIT/192K. Asynchronous Sampling AD1896 24BIT/192K. D/A Convert PCM ...
I was guessing about the 12AT7, though it is true that the 12AT7 was actually designed as an RF amplifier not for audio (it has more shielding). The 6AB4 is also the same as 1/2 of the 12AT7. However the 6Q7 triode section IS identical with the 6AT6. The 6SC7 dual triode is also similar (like the 6SL7 but a common cathode). The
12AT7 - ECC81 IN STOCK - FAST SHIPPING - AUSTRALIA WIDE. Another popular twin triode. Lower gain, with more drive than a 12AX7, these feature in many HiFi pre amps, power amps and guitar amps. Variants include: 7062, E180CC, E81CC, CV6091, 12AT7WA, 6060, 6679, 7492, A2900. 12AT7 - ECC81 Current production and New Old Stock Valves for Tube amps ...
A 12ax7 will compress the power tubes more, 12at7 and others do it less, and 12au7s even less so. I always run a 12at7 in my PI almost as a blind rule, cuz poweramp distortion isn't as pleasing to my ears, but never have noticed a tonal change between the brands Maybe your ears are more discriminating.
12AU7 is a high-gain tube very often used in power amplifiers as the driving one. It's also dual-triode that can be used in differential inverting connection just like OPAmp. 6922 is also dual triode has a lower gain than 12AU7 but used for the same purposes where large isn't neccessary i.e. in preamps.
The JJ Electronic ECC802 is a high performance, long plate version of the ECC82 / 12AU7. Like all JJ preamp tubes, these are built into a rugged package using the spiral filament and robust plate structure resulting in low microphonics and high reliability.
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The US National 12AU7's I have, have a fast transient sound which I tend to prefer as a general trend because I'm an imaging freak. But admittedly when I used the 2 Mullard 12AT7's I have in a somewhat similar setup (similar Ra*3 GC, obviously with higher gain) there was a very subtle lifelike musical quality to them but at expense of Feb 22, 2017 - One Mullard Long Plates Square Getter 12AU7 Branded Thomas Vacuum Tube #Mullard

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A new production 12AY7 can be dark sounding and an NOS GE 12AY7 can be nice and chimey. A mullard 12AX7 is smooth and yummy and a sovtek is dark and brittle on the top end. It depends on a lot of things.Gain is just the start. A 12AT7 will work but a good 12AY7 will be best. 12AU7 - 19. Other substitutes in these families are (some are much more resilient and built for rugged use, called "ruggedized" in the tube field): 12AX7 - ECC83, 7025, ECC803, E83CC, 6681 (YOU SHOULD NOT USE THIS TUBE IN A RAVEN AUDIO AVIAN SERIES INTEGRATED!) * 12AT7 - ECC81, 6201, 6679, 6060 12AY7 - 6072 12AV7 - 5965 12AU7 - ECC82, 5963 ... The preamp is based on the 6SN7 tube, which has always been one of my favorites. The bigger octal tubes like the 6SN7 have a much more relaxed, fuller, and richer sound than the smaller tubes like the 12AX7, 12AU7 or 12AT7 tubes used in many other preamps.

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Sep 20, 2017 · A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. The primary difference is the tube gain. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a gain factor of 60.

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The 12AT7 is a miniature, high-mu twin triode designed for use as a grounded-grid radio-frequency amplifier or as a combined oscillator and mixer at frequencies below approx 300MHz. This tube has a mu factor of 60, as compared to the higher gain 12AX7 with a factor of 100, and the 12AU7, with a mu of only 20.The 12AX7 has a u (mu or amplification factor) of about 100. The 12AT7 is much lower, and the 12AU7 is lower still with a u of around 20. You simply will not have anywhere near enough voltage gain with either of these two tubes. Ever wonder why many speech amplifier circuits have a 12AX7 driving a 12AU7? ecc81 datasheet, Jun 08, 2018 · 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.

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Oct 20, 2013 · A 12AV7 is in that 'hotter tube' territory, similar power-rating to a 12AU7 or a 12AT7 and with an amplification factor that is mid-way between those other two types, but with a lower plate resistance and a wider bandwidth than any of the 12A_7 family. Tubes for 300B Amplifiers; Tubes for 2A3 Amplifiers; KT88 and EL34 Tubes; 845 / 211 Tubes; 6SN7 / 6SL7 / 12AU7 / 12AX7 Tubes; 274B / 5U4G / 5Z3PA Rectifier Tubes

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Sep 20, 2017 · A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. The primary difference is the tube gain. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a gain factor of 60. Reviews of 12au7/ECC82 vacuum tubes and equivalents. Hi there, I’ve now listened and analyzed countless 12au7’s (and it’s equivalents) and thought I’d give my opinion on my current favorites. Jun 16, 2019 · The 12AT7 has some advantages. It can drive more current than a 12AX7, and the output impedance is significantly lower. If you use this calculator, swap out AT7 and AX7, you see in the Phase inverter, the difference in gain is completely negligible, it barely changes.. 12at7 b309 12at7 b319 7an7 b329 12au7 b339 12ax7 b349 7ek7 b36 12sn7gt b63 6a6 b65 6sn7gt b719 6aq8 b729 ...

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ECC83/12AX7 vs 12BH7: Michael Appelt: 5/19/00 12:00 AM: The 12BH7 compares more to ECC81/12AU7, not to ECC83/12AX7. If I recall correctly it basically is higher ... Re: 12au7 vs 12ay7 Amplification factor, 12AX7=100 12AT7= 60 12AY7 = 44 12AU7 =17 and 19.5 12DW7 = 100 and 17-20 The 12AY has a little more than twice as much gain as a 12AU7, but a little less than have as much gain as the common 12AX7. The 12AY7 was used for V1 in Tweed Bassmans but a 12AX7 is often substituted for more gain in guitar ...Top Brand pre-amp tubes in stock ready to ship, 12ax7, 12au7, 12at7, 12dw7, ECC83, ECC82, ECC81, CV4004, ECC823, 5751, 7025, B749, B759 and plenty more amp tubes

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Ecc81 is a 12AT7. The fact that it is E80CC rather than ECC80 means it is a better quality tube ... An really not the best sub for 12AU7, though 'S' is quite alike (but

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Gain des tubes de préamp:12AX7/Ecc83, 12AT7/Ecc82, 12AU7/Ecc81, 12AY7, 5751 Vous pouvez installer plusieurs lampes différentes dans votre ampli à la place des 12AX7 . Les références les plus connues sont la 7025 et la ECC83.