Description
Toshiba Tokyo Japan production !
This is a 12AU7A (ECC82) produced by Tokyo Shibaura Electric Co. in1968 in Tokyo Japan. The tube has a ring getter and ribbed grey plates, see pictures. Tube with balanced systems; see test results.
Sonics
The Tokyo Shibaura Electric Co. 12AU7A double triode’s most distinctive sonic feature is its transparent, neutral, spacious presentation, with a light touch of warmth illuminating your music. I refer to the many threads on the web for more information. Excellent preamp valve and because of the low noise level, very suitable in phono stages.
Test method & results
The tubes have been tested carefully with the official Telefunken test set-up and our sophisticated test equipment. Please read our testmethod for the ECC82 tube family. The measurement data below shows that this tube is balanced. And fulfills the factory specs of a new/NOS tube.
| Valve
V300 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
11,5 / 11,3 mA
2,4 /2,4 mA/V OK |
= NOS / NOS
= NOS / NOS
|
Where NOS is : Ia = 8,7 til 12,5mA, Gm= 1,9 til 2,7 mA/V. (Telefunken factory specification see test page)
Short description
| Tube type | 12AU7A |
| Quantity of Tubes | One tube |
| Brand | Toshiba |
| Manufactured in | Tokyo Japan |
| Dates | 1968 (8J) |
| Construction | Ribbed grey plates |
| Getter Construction | Halo getter |
| Print Condition | Nice; see pictures |
| Box included | Generic white box |
| Equivalent tubes: | ECC82, 12AU7, ECC802S, CV4003, 12AU7A ,5814A |
| General test results | NOS |
