Need help identifying 12AU7 tubes

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david45

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Need help identifying 12AU7 tubes
« on: 23 Jul 2019, 04:02 pm »
Can anybody help? 











avahifi

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Re: Need help identifying 12AU7 tubes
« Reply #1 on: 23 Jul 2019, 08:13 pm »
Third phono down from the top shows the tube ID clearly, 12AU7.

This is an older tube as RCA has not made vacuum tubes for many years now.

The photos won't tell you if this sample is a good tube or not.

Frank

kmmd

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Re: Need help identifying 12AU7 tubes
« Reply #2 on: 23 Jul 2019, 08:56 pm »
You may want to check Brent Jessee's website for help: http://www.audiotubes.com/12au7.htm

With orange lettering, it may be these:

12AU7WA/6189 RCA Military/Commercial Grade

NOS, White Box. Blackplate, gold, orange or white lettering, extra support rods. A lower cost alternative to the 5814A.

$21.00

in Stock

I don't see the getter, but I hope this helps.

Ken

FullRangeMan

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Re: Need help identifying 12AU7 tubes
« Reply #3 on: 23 Jul 2019, 09:01 pm »
By the little I know on tubes I have never seen a such tall plate in 12AU7,
imo looks as a cheap JJ ECC802S plate, the JJ and EH ecc802 have both short plates.
https://www.tubedepot.com/products/jj-ecc802s-hi-performance-12au7-gold-pin-preamp-vacuum-tube

The posted photos above show a fantastique new tube paint labels,
very new, just like factory released, there are various labels and all
are new, the paint looks brand new, not a 50 years old paint.

To my eyes the top glass shape, getter and the top tip looks as a JJ ECC802S
tall plate current production not a expensive NOS RCA.

FullRangeMan

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Re: Need help identifying 12AU7 tubes
« Reply #4 on: 23 Jul 2019, 09:22 pm »
This big image can show better:

david45

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Re: Need help identifying 12AU7 tubes
« Reply #5 on: 24 Jul 2019, 06:25 am »
Thank you very much for helping out! You guys are the best!  :thumb: