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Russia equivalent of 12AU7
Russia equivalent of 12AU7
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Old 27th July 2019, 09:59 AM   #1
kecapmanis021 is offline kecapmanis021  Indonesia
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Default Russia equivalent of 12AU7

My apology if this has been asked in the past, tried to search but didn't found anything.

Is there a Russian equivalent for 12AU7? Same pin arrangement and perhaps electrically compatible.

Please bear with me as I'm just learning about valve. Thank you.

~Kecap
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Old 27th July 2019, 11:23 AM   #2
cliffforrest is offline cliffforrest  United Kingdom
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Russian and Chinese Tube Substitutes
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Old 27th July 2019, 01:02 PM   #3
Parafeed813 is offline Parafeed813  Netherlands
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No ECC82/12AU7 on that page.
The 6CC40 is an Eastern European type you sometimes see listed.
Why not look at current production ECC82?
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Old 27th July 2019, 03:06 PM   #4
Francois G is offline Francois G  United States
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Quote:
Originally Posted by Parafeed813 View Post
No ECC82/12AU7 on that page.
The 6CC40 is an Eastern European type you sometimes see listed.
Why not look at current production ECC82?
I think you mean ECC40, right? I agree - why not current production?

If you really want NOS russian close to 12au7: The russian 6sn7 equivalents (6H8C) have very close electrical characteristics compared to the 12au7, in an octal socket, of course.

Also, the Russian sub-miniature 6N16B-V is similar, but not very close in characteristics. These tube are reported to sound very good, although I have not heard them.
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Old 27th July 2019, 03:24 PM   #5
Bigun is offline Bigun  Canada
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Russia equivalent of 12AU7
Ive looked before; there’s no equivalent.
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Old 27th July 2019, 06:07 PM   #6
45 is offline 45  Italy
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Quote:
Originally Posted by Francois G View Post
I think you mean ECC40, right? I agree - why not current production?
Not at all. The 6CC40 was made by Tesla and is electrically identical to the ECC82. I haven't checked the pin-out and heater connections though.
The 6CC41 is the ECC83 equivalent.

The ECC40 is completely different tube starting from its rimlock base. It's not similar at all having gain of 32 due to about 1.5x plate resistance. This was introduced by Philips after WWII and it was replaced in early 60ies by the E80CC. The E80CC is/was a special quality tube with very close specs to the ECC40 using a noval base with the same pin-out of the ECC82/83. It has gold plated pins and 10K hours guarantee if used with specified specs. In reality I have often found that the ECC40 is more linear and pretty much at the same level of the best 6SN7 you can find.....just to say that, in addition to the different gain and plate resistance, the ECC82 is not even remotely close to the ECC40 in terms of linearity.

Last edited by 45; 27th July 2019 at 06:16 PM.
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Old 28th July 2019, 02:23 AM   #7
kecapmanis021 is offline kecapmanis021  Indonesia
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Guys, thanks for your replies, much appreciated. I'm just being curious, as usuall.

@45, now that is interesting. I'll try to find something to read about 6CC40. Thanks.

~Kecap
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Old 28th July 2019, 03:05 AM   #8
Francois G is offline Francois G  United States
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Quote:
Originally Posted by 45 View Post
Not at all. The 6CC40 was made by Tesla and is electrically identical to the ECC82. I haven't checked the pin-out and heater connections though.
The 6CC41 is the ECC83 equivalent.
My apologies - I was unaware of the 6CC40 and 6CC43 tubes and will try to learn more. I well familiar with ECC40, as well as E80CC.
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Old 28th July 2019, 09:28 PM   #9
korneev is offline korneev  Russian Federation
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The equivalent of 12AU7 tubes from the old USSR production unfortunately does not exist.
Current production from Russia- Electro-Harmonix, Tung-Sol.
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File Type: gif au7-1.gif (154.4 KB, 323 views)
File Type: jpg au7-2.jpg (181.3 KB, 322 views)
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Old 29th July 2019, 12:51 AM   #10
johnsurnamerobinson is offline johnsurnamerobinson
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Given the level of interest both by musicians and hi-fi enthusiasts I am supprised no one has started a buisness making 21st centurary tubes using modern tools (cad ect) instead of just remakes from 50-100 years ago.
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