Beschrijving
Early version of the General Electric 12AT7WA made in 1962 in Owensboro, USA
This is a rare version of the 12AT7WA /6201 tube. It is produced in 1962 in the General Electric Owensboro, Kentucky plant. The code on the glass 188-5 indicates thatThe tube has a tilted halo getter, a half box plate structure and copper grid posts, see pictures. Very healthy tube!
The 12AT7WA /6201 is a military specification of the ECC81, which means that this tube has stricter quality and reliability requirements than the standard ECC81. This often makes the 6201 a better choice for applications where reliability and quality are crucial.
This particular tube is an instrument grade selection which means that the noise floor is lower and the precision higher!
Sonics
Note from the WEB: This tube is highly regarded by many audiophiles. The tone is described as detailed, articulate and warm.
Test results*
The tube tests NOS. The internal balance between the triode sections is good. The measurement data below illustrate that the tube is in excellent condition.
| Valve
V50 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
9,6 / 9,1 mA
5,9 /5,6 mA/V OK |
= NOS / NOS
= NOS / NOS
|
Where NOS is : Ia = 7 to 14 mA, Gm= 4,5 to 6,5 mA/V.
* For test methods and factory specification read the tube testing page.
Short description
| Tube type | 6201 / 12AT7WA |
| Quantity of Tubes | One tube |
| Brand | General Electric |
| Manufactured in | Owensboro, Kentucky, USA |
| Date codes | 62-18 62-35 (1962) |
| Construction | Half box plates, triple micas, copper grid posts |
| Getter Construction | Slanted halo |
| Print Condition | Good; see pictures |
| Box included | Generic white box |
| Equivalent tubes: | 12AT7, ECC81, 12AT7WA, ECC801S |
| General test results | NOS |
