Description
This 12AU7A tube is produced in 1960’s by CIFTE in France.
Many french tubes were available from Compagnie Industrielle Française des Tubes Electroniques (CIFTE) under their Mazda-Belvu brand (originating from Societé Radio Belvu.
The tube has a typical design; see pictures. The tube has a halo getter and grey plates. The tube date code is 6052; so most likely manufactured in the december of 1960.
The sonic properties of the Mazda 12AU7A is described as: “These tubes give wonderful imaging, sparkle, dynamic, organic and open sound with a holographic 3D-soundstage”.
The tube is thoroughly tested. Both tubes match the factory specifications very well. See test results in the section below.
Test results
Test methods and test conditions are outline on the tube testing page.
The measurement data below illustrate that the tube is in good till excellent condition.
| Valve 1
V283 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,2 /10,3 mA
2,1 /2,2 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Telefunken factory specification see test page)
Summarized description
| Tube type | 12AU7A |
| Quantity of Tubes | One tube |
| Brand | Mazda |
| Manufactured by | Cifte, France |
| Date code | 6052 AUA |
| Plate Construction | Grey plates with rond hole |
| Getter Construction | Halo getter |
| Print Condition | See pictures |
| Box included | Generic Mazda box |
| Equivalent tubes: | 12AU7, ECC802S, ECC82, 13D8 , CV4003, CV491, 5814 , 7730, 5963 |
| General test results | NOS |
Please read our test and shipping policy before buying also !
