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Original Message

Siemens 12at7 2mica vs. 3 mica versions,

Posted by Bambi B on May 1, 2009 at 06:23:22:

PHOTO: Three kinds of Siemens E81CC: L>R : Two mica, Two mica/double getter support, and triple mica

dmzwizard,

I have tried the Siemens two mica ECC81, two mica 12AT7WA, Siemens E81CC/6201 2 mica and the Siemens triple mica E81CC- which may also be labeled 12AT7WA (6201) and of all, the triple mica E81CC is among my three favourite 12AT7's of the many kinds I have:

12AT7 [8] 2, 2, 1, 1, 1, 1 > TOTAL: 89
Siemens & Halske E81CC- 3 mica- DE- NOS
Siemens & H- ECC81- NOS
Valvo 6201â€“White label- Hamburg- gold pin -NOS
Mullard M8162- UK- NOS
Sylvania GB 6201-steel pins- NOS 124/120,120/118
Sylvania GB 6201 gold pins- US- NOS
Amperex Bugle Boy-France- NOS
GE 6201 5 star- 3-mica- NOS
RCA -HP- NOS
RCA 6201 2-mica black plate- NOS
Sylvania JAN 12AT7WA 3-mica 1958 -NOS
Sylvania 12AT7WA-Gold Print- 3 mica -USED
GE -NOS
Westinghouse- black plate-NOS
Telefunken ECC81- USED
Philips JAN- NEW
ARC -RFT- USED
GE 6201- 3 mica, sq gtr- NOS
Telefunken ECC81- NOS
Siemens&H-12AT7WA-3 mica-1-dbl gtr sup-DE- USED
Siemens-12AT7WA- 3 mica- single gtr sup- DE- USED
Sylvania JHS 12AT7WA 3-mica, bl pl, sq gtr -NOS
Raytheon JHC 12AT7WA- blk plt 3-mica- NOS [*5
Raytheon JRO 12AT7WA halo gr plt 2 mc-NOS [*5
Siemens ECC81 by RFT- military label- USED
Telefunken ECC81 by Siemens & H- Munich- USED
Valvo ECC81- Mullard Blackburn UK- USED
TungSol 6201 2-mica, grey plate-halo- NOS
Valvo 6201 Hamburg gold pin- dimp- DE- NOS [20
Siemens E81CC/6201 2 mica- stl pn- DE- NOS [13
Valvo 6201, Blue- 2 mica g pin- halo-DE â€˜64- NOS [27
Siemens & Halske E81CC- 2 mica- DE- NOS [15
Telefunken ECC801S- NOS
Telefunken ECC81- NOS

It's the energy and effortless, detailed, punchy, transparency of the Siemens triple mica E81CC that I like so much. Excellent in modern gear, and can help wake up sleepy, dark, or warm vintage too. The Siemens is one of the two 12AT7's that I bought enough NOS to use in all 8 positions where I use 12AT7 (the other is the romantically wonderful Sylvania triple mica, square getter 12AT7WA). My other top 12AT7 choice is the Valvo, Hamburg 6201, which is wonderful in every way- not as "enthusiastic" as the Siemens.

Actually, the ordinary Siemens ECC81 and the two mica E81CC/12AT7WA/6201 are very good, but, for me, the triple mica E81CC is among the very best of the type I've heard.

So, how's the SP8 going for you so far?

Cheers,

Bambi B