This page lists all of the 12AT7 tubes I currently have in stock, including all industrial and European versions.
It is a long page, use your scroll button and scroll down the page to see it all. These are extremely high demand vintage tubes, so I have these listed on their own page, as my stock changes rapidly. If you need a quantity of these tubes, or have specific needs such as matching, special construction, etc.
Stock levels with actual quantity on hand shown are being phased out as we update inventory. The only exception to this will be very scarce tubes where we typically will only have a small stock on hand. Of course, any time you need a large quantity of tubes of any type, is is a good idea to email us for a stock check first. We can match most small signal preamp tubes on a Tektronix curve tracer. Scroll down to watch a brief video about matching below. This runs the tube at full rated plate voltage, and plots the curves at 10 different grid bias levels.
The most accurate method to test tubes, the curve plots can actually be compared to the printed examples for each tube type that appear in the manufacturer technical data sheets and books. Each triode of a 12AT7 can be compared both internally balanced and to other tubes matched. Prices listed below for "matched pair" tubes are Gm matching only, and there is no additional charge for Gm matched pairs.
For most uses, Gm matching is fine. Curve tracer matching would be recommended if the tubes are to be used in a phase inverter circuit, phono or microphone preamp, or other critical or demanding circuit.
Curve tracer matching is an additional special request item and is charged in addition to the listed price of the single or matched pair tubes on this page. Get two full years of warranty coverage for these tubes!. Can't find a particular tube? Please Read. Return to the Audiophile tube page. Return to the Main tube page.
Return to the Home page. The 12AT7 is a high-frequency twin triode in a small 9-pin miniature glass package.Data Sheet. Page 1 of 4. Double Triode. Quick reference data. We have another Brimar 12AT7 in the collection.
The difference being the length is 47 mm. Type 12AT7 was first introduced in. The 12AT7 has somewhat lower voltage gain than the datashset, but higher transconductance and plate current, which makes it suitable for high frequency applications.
Collection of Ottmar Rollmann D. Collection of Patrice Zeissloff F.
A Mini Review of Three 12AT7 Tubes
Collection of Aldo Patriarca CH. Collection of Emilio Focosi I. Collection of Giuseppe Palumbo I. From Wikipedia, the free encyclopedia.
Views Read Edit View history. Please help improve this article by adding citations to fatasheet sources.Die Abschirmwirkung des Schirms zwischen den Anoden. Die Schaltungstechnik der Vorstufe und deren verschiedenen Schaltungen.
Das ist als Anlage hier zu lesen. Antique radios, Old Time Radios. Amperex; New York. Quantity of Models at Radiomuseum. Literature "Telefunken Laborbuch Band 1 Taschenbuch hellblau ". Collection of Gerhard Heigl A. Collection of Jacob Roschy D.
Collection of Egon Strampe D. Collection of Christian Schaufelberger CH. Collection of Trev Levick D.12AT7 ecc81 test Gm e gas provavalvole hickok 800A tube tester
Collection of Ekkehard Pfau D. Collection of Roland Biesler D. Collection of Patrice Zeissloff F. Collection of Karlheinz Fischer D. Collection of Peter Steffen CH. Collection of Guido Pedrali Noy I. Collection of Karl - Heinz Bossan D.
Collection of Ulrich Fieseler D. Collection of Aldo Patriarca CH.A German tube, a Russian tube and an English tube walk in to a bar……. The 12AT7 is not the most commonly used preamp tube in audio. That distinction probably falls to the 12AX7, especially when you add guitar amps to the mix. Why three quads you ask? Spares for my DIY phono stage. Unless of course, you have your heart set on some Amperex or Telefunkens. Then the prices are, to say the least, eye watering.
A note to guitar players: The 12AT7 is not normally used in guitar amps, the exception being as a reverb driver in some Fenders. Your amp tech or favourite tube vendor should be able to sort you out.
All tubes under review had at least hours run time on them before serious listening commenced. Some by a little, some by a lot, and almost always for the better. A couple of the Mullards and two or three of the RFTs flashed brightly when powered up. To the uninitiated, and even us old timers, this can be disconcerting to say the least. This is normal for European tubes of a certain vintage and is not a defect. The going rate is about 19 to 22 US dollars each.
Sound: The sound of these tubes was balanced once broken in. Bass seemed extended and reasonably articulate, mids were clear, and the highs struck a good balance between too dull or too bright.
The sound of these tubes in the Elekit, optioned as described above, was very good even in comparison to a much more expensive amp. As such, they are some of the least expensive Mullard NOS tubes around. The manufacture date on these is Between 40 and 50 US dollars each is what they will set you back.
The same tube is available with the Mullard name and logo, but usually costs an extra 10 or 15 bucks. Bass was as deep, but a bit more detailed and articulate, with slightly better control. They can usually be found for between 18 and 20 US dollars each. That is, if you buy in to the stereotype — no pun untended, well maybe a small pun — that Telefunken smooth plate tubes were all about the midrange.
Vocal sibilance is spotlit, which is not a good thing.Ich habe die Stifte nachgemessen. Noch dazu ist die Spitze konisch und die Stifte ca.
Inzwischen haben mich zwei emails erreicht. Die konischen Stifte lassen sich wohl leichter in die Fassung einstecken. Antique radios, Old Time Radios. Siemens; D S. Quantity of Models at Radiomuseum. Collection of Jacob Roschy D. Collection of Martin Steyer D. Collection of Christian Schaufelberger CH.
Collection of Mario Coelho P. Collection of Bernhard Nagel D. Collection of Trev Levick D. Collection of Ekkehard Pfau D. Collection of Roland Biesler D.
Collection of Patrice Zeissloff F. Collection of Otto Frosinn D. Collection of Karlheinz Fischer D. Collection of Karl - Heinz Bossan D.
Collection of Ulrich Fieseler D. Collection of Ottmar Rollmann D. Collection of Giorgio Busletta I. Collection of Emilio Ciardiello I. Collection of Georges Werts B. Collection of Danko Tkalec HR.
Collection of Werner Wussow D. Collection of Klemens Rhode D. Collection of Hermann Fleischanderl A. Collection of Jacky Parmentier F. Collection of Massimo Pedrina I. Collection of Tomasz Szczesniak PL. Collection of Bekir Yurdakul F. Collection of Kazimierz Jarosz S. Collection of Stig Comstedt S. Collection of Hans-Peter Fritzwanker D. Collection of Reinhard Riek D. Collection of Michael Krapf CH.All our tubes are guaranteed for 3 months from the date of purchase.
Any exceptions will be noted on that tube's Warranty tab If you receive a tube that does not perform to the manufacturer's specifications, please do the following: - contact us to get a return authorization - return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube. We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice. Surprisingly, these new stock Gold Lion's are just what I wanted. Smooth and lively without being hard or harsh Nice depth, detail and texture The tubes that came with the unit were, in a word, lousy-ok bass, mid range and treble was listenable but keep you wanting for overall better sound top to bottom.
I tried the Mullard 12AU7 and found them to be an improvement in the sound.
Preamp Tubes – 12AT7 / ECC81 / 6201 / CV4024
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12AT7 / ECC81 Tubes
Was this review helpful? Yes 13 No. Thomas The tubes that came with the unit were, in a word, lousy-ok bass, mid range and treble was listenable but keep you wanting for overall better sound top to bottom.
Yes 16 No. Yes 3 No This Amperex branded was made in in eastern europe and is an excellent value in the 12AT7 tube category. Far exceeding thquality of any 12at7 tube being made today. The is a premium low noise 12AT7 with heavy gold plated pins.
These were made in the 's by both CBS and Raytheon for highly critical industrial applications. On par with the Valvo E81CC, it is incredibly rare and has an extremely open soundstage.
Excellent construction and quality, and has balanced section so it is recommended for use in phase inverter positions or DACS. Low price! These have excellent clarity and are a great value! It has wide, flat black plates and an amazing huge soundstage! These are the biggest and boldest sounding tube in the 12AT7 category, and are extremely low noise and low in microphonics.
The Ken Rad 12AT7 is an extremely rare find. Some of the oldest 12AT7 we have in stock. Heater is center tapped to permit operation in series at These amazing tubes were designed for long life and are shock resistant up to g. They were also made to withstand bulb temperatures up to deg C. The anode is made of pressed sheet as normal, the box is closed on all four sides. This is significantly smaller than the commercial ECC Special screening was used to select them for audio use and low noise, and they have a 10, hour heater.
These are incredibly detailed, and highly recommended. This is a suitable replacement for any 12AT7 tube type. Various brands available. These are Triple Mica, grey plate construction with D-getters. Highly recommended for Singlepower Extreme headphone amplifier. RCA 12AT7.
12AT7 / ECC81 / CV4024 / CV455 / A2900 / B739 / ECC801S
Excellent clarity and longevity. Excellent detail and recommended for Fender guitar amps! Extremely low noise and low microphonic construction, they far surpass any 12at7 which is currently being made today. Various brandings available.
These are extremely neutral with a clean open clarity. Extremely low soundstage and transparent. The Sylvania Gold Brand is a special quality 12at7 variant, which has gold plated pins. They have excellent detail and are a perfect match for hifi systems or guitar amplifiers. The Telefunken 12AT7 is renowned for its amazing fidelity, speed, and accuracy.
Clear high end extension and accurate bass reproduction. Highly recommended for DACS and line stages. The Telefunken eccS is an amazingly transparent, open and accurate 12AT7 variant.