Beschrijving
Telefunken ECC81. Rounded getters, both 1960 production.
This ECC81 is produced in 1962 by Telefunken in Berlin Germany. The tube has rounded plates without holes. The halo-getter ia at an 90° angle position. The tube has a perfect getter flash. “Silver” grid posts.
Sonics
These early tubes are considered by audiophiles as among the best ECC81 tubes! They are neutral (with a slight hint of warmth) with a great soundstage and characterised by an impressive open “air” at the crisp top end. The midrange is flat, and the bass is tight and accurate. These tubes have a fine sense of dynamics and most are impressively quiet. Soa also excellent for phono stage and preamplifiers!
Test results*
The tubes tests NOS. The internal balance between the triode sections is excellent and both tubes are matched nicely. The measurement data below illustrate that the tube are in excellent condition.
| Valve
V103 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,3 / 10,3 mA
6,3 /6,2mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve
V114 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,0/ 9,4 mA
5,2 /5,4 mA/V OK |
= NOS / NOS
= NOS / NOS
|
* Where NOS is : Ia = 7,0 to 14,0mA, Gm= 4,5 to 6,5 mA/V. (Telefunken factory specification see test page)
Short description
| Tube type | ECC801S |
| Quantity of Tubes | One pair |
| Brand | Telefunken |
| Manufactured in | Berlin, Germany |
| Date codes | B9202824 (1962) |
| Construction | Rounded plates |
| Getter Construction | Halo getter |
| Print Condition | See pictures |
| Box included | Generic Telefunken box |
| Equivalent tubes: | 12AT7, ECC801S, 12AT7A, E81CC |
| General test results | NOS |
