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Seimens triple mica 12AX7WA and E83CC

Posted by Bambi B (A) on January 29, 2010 at 18:55:10

In Reply to: Seimens 12ax7wa posted by Dr.Phil on January 29, 2010 at 07:21:49:

PHOTO: Late Siemens triple mica E83CC

Dr. Phil,

The pictured Siemens 12AX7WA's are (as tinderstocks mentioned) the late- last version of the triple mica E83CC- in my view one of the best 12AX7s ever. The "-WA" suffix is the US military designation (rugged and low noise I think) whereas the European ones were called E83CC. That they are late is apparent by the the "SIEMENS" in block letter lettering and absence of the "S&H" (Siemens and Halske) logo- probably mid-70's. The tubes in the photo are the same tube as in your photo- just with the Euro name. The blue and orangish boxes are another sign of the late style Siemens.

I could be wrong, but there may have been a late Siemens 12AX7WA that had fairly long plates and two micas.

I like the triple mica E83CC so much I eventually bought 11 of them. They are very quiet and high gain, so I like them in phono stages. If you see these NOS and priced reasonably- that is, less than $90-$100, they are wonderful tubes- energetic, punchy, bass, clean, detailed and dynamic- more authority and weight than Telefunken. 10,000 hour rating as well.

Cheers,

Bambi B

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