Description
Pair: 12AU7 long plates square-getter made in by Tung-Sol USA in the fifties.
The chance to find elsewhere an unused D-getter PAIR of this Quality is small!
This is a pair is produced by Tung-Sol in the USA. The tubes have a square getter, long plates and copper posts, see pictures. The early NOS 12AU7 is highly regarded. Very healthy NOS specs! Tubes with matching systems; see test results.
Sonics
Excellent preamp valve, low noise, very smooth extended highs, very good in phono stages. Balanced, good resolution and transparency with nice tones, recommended!
Test results*
| Valve 1
V160 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
9,7/ 9,8 mA
2,0/ 2,1 mA/V OK |
= NOS
= NOS
|
| Valve 2
V161 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,1/ 10,1 mA
2,1/ 2,1 mA/V OK |
= NOS
= NOS
|
Where NOS ECC802S is : Ia = 8,7 to 12,5 mA, Gm= 1,8 to 2,7 mA/V.
* For test methods and factory specification read the tube testing page.
Short description
| Tube type | 12AU7A |
| Quantity of Tubes | One pair |
| Brand | Tung-Sol |
| Manufactured in | USA |
| Dates | Fifties |
| Construction | Long plates |
| Getter Construction | square getter |
| Print Condition | See pictures |
| Box included | Generic white box |
| Equivalent tubes: | 12AU7, ECC802S,ECC82, 5814A |
| General test results | NOS |
