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For our tube tests and ratings of the ECC82 family we use the test setup and the very strict NOS and end of life criteria that are specified by the manufacturers (Telefunken, Philips, Siemens, Mullard, …). The specs of a premium ECC82 (e.g. ECC802S), testing setup and end of life criteria as supplied by the manufacturers are shown hereafter.
12AX7/ECC83 double triode ... Genalex Gold Lion 12AX7/ECC83 - £34.33 Bugera 12AX7-A - NO LONGER AVAILABLE ... 12AX7/ECC83 Electro-Harmonix datasheet. BUY NOW.
ECC83 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. The TELEFUNKEN Elektroakustik ECC82-TK is a newly manufactured and cryogenically treated rendition of the classic ECC82, commonly known by the American designation 12AU7. The ECC82 is a dual triode vacuum tube with medium gain and low noise characteristics, making it ideal for hi-fi audio equipment and instrument amplification.
ECC88 Datasheet, ECC88 PDF. Datasheet search engine for Electronic Components and Semiconductors. ECC88 data sheet, alldatasheet, free, databook. ECC88 parts, chips ... This 1960s Telefunken ECC83 / 12AX7 has smooth gray plates and a diamond imprint on the base. The white print on the glass is labeled for other companies (Fisher, Dynaco, Silvertone, etc) and says "Made in Western Germany" (label may be partial). Where the Telefunken smooth-plate excels, in my experience, is a certain band of high-mids that no other 12AX7 type hits without also having piercing treble. I've found another sonic aspect of 12AX7 performance to be very important: harmonic content. This is a kind of distortion, even if the amp does not sound overdriven.
ECC83 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.
ECC83 page sheet date 1 1 1954.11.11 2 2 1954.11.11 3 3 1955.02.02 4 4 1955.02.02 5 A 1953.06.06 6 B 1953.06.06 7 FP 1999.02.16 A Comparison of Current Production 12AX7 Tubes. RCA and Sylvania first introduced the 12AX7 to the world in the late 1940s. 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.
Preamp Valves 12ax7 ecc82JJ, 12ax7M | Hot Rox UK graded (see options on the valve page). We stock thousands of pre-amp valves from NOS to current manufacturers like JJ, Electro Harmonix, Psvane, Tube Amp Doctor (TAD), Fender, Groove Tube and many more ECC83 EI Yugoslavia (Telefunken silver long smooth plates) 2A1 code 99 euros matched pair ECC83 Philips 12AX7 Small Round O Getter, used, matched pair 115 euros ECC83 Philips 12AX7 Big Round O Getter, used, matched pair 165 euros ECC83 Philips 12AX7 Foil D Getter, used 70%, single 95 euros ECC83 12AX7 Philips Dimple Disc
Links to other tube datasheet sites TDSL3 Duncan Munro's excellent TDSL3 search engine for tube datasheets on the Web. Frank Philipse A giant collection of Philips (and other brands) datasheets. Audio Antik Thorsten Kliefoth's Telefunken and Valvo datasheets. JJ Electronics The JJ Electronics tube datasheets in Flash HTML. EI-RC
That was a nice analysis, Scott. I just want to add something from my tube experimenting: the late-production Mullard 12AT7WA (CV4024 from the early '80s) has the thickest character of any 12AT7 type I've used, and has lots of solid low-end. It really is like no other 12AT7 I've tried - including older Mullards - and is worth the EF806S Gold Pins TUNG-SOL. Super premium EF86/6267 replacement based on the Telefunken EF806S. Super low noise and microphonics. Gold pins. Large Image From what I read in the GE data sheet both can be run from a 12.6 volt supply (series connection) or 6.3 volt (parallel connection). Which is what I already knew. The stated advantage to the 12AX7-A is that its use is advantageous in applications that require low hum and microphonic output.
ECC83 page sheet date 1 1 1954.11.11 2 2 1954.11.11 3 3 1955.02.02 4 4 1955.02.02 5 A 1953.06.06 6 B 1953.06.06 7 FP 1999.02.16 Telefunken is really one of the biggest brand among European tube manufacturers. For sure the biggest one with Philips Holland and, along with the Western Electric, one of the biggest ones in the world. Their ECC83 is the most famous ECC83 / 12AX7 ever. Still today, the market for ECC83 is huge,... Jul 19, 2005 · A regular Telefunken smooth-plate or ribbed-plate 12AX7 is not expensive. The tubes that are marked FISHER or whatever are even less money (maybe 10 bucks a tube) and will sound the same. Arin, the idea that you must avoid equipment that uses a 12AX7 tube made me almost spit my food out of my mouth.
The 12AU7 and its variants are a miniature nine-pin (B9A base) medium-gain dual triode vacuum tube. It belongs to a large family of dual triode vacuum tubes which share the same pinout (RETMA 9A). 12AU7 is also known in Europe under its Mullard–Philips tube designation ECC82. 1 X NOS Tesla E83CC - ECC83 - 12AX7 Telefunken ECC803S Clone Vacuum Audio Tube - $68.30. NOS TESLA E83CC - ECC83 - 12AX7 - ECC803S Price is for 1 tube. In brand new, NOS condition. Small double triode tube with desired yellow labels, gray plating and gold pins. Pin base is noval (B9A). Do different brands of tube sound different? Part II. No? Well maybe they do. Join me as the trip takes a wild turn in part II.. I’d been meaning to take this whole thing to the next level and do some tests that would, at least in some way, give an indication of performance when driven hard, all the way into serious clipping.