Description
Mullard Blackburn UK production !
This pair ECC82 is produced by Mullard in1964 in Blackburn UK (version I61). The tubes has a copper getter post and grid posts, see pictures, and ribbed grey plates, see pictures.
Sonics
The overall sound character of British tubes is warm and lively with a very spacious soundstage. The top is silky soft and pleasant and does not roll off. They retain a nice sense of “air” at the top end, and the upper mids are smooth and fluid. This tube class reproduces the human voice, including female voices in complex choral pieces, with impressive realism. In addition, they are also known for rich bass. I refer to the many threads on the web for more information.
The mid sixties Mullard ECC82 more than meets the previous description; the sound is even more natural and more intimate; the soundstage seems to be expanded in all three dimensions, the vocal reproduction is second to none.
Excellent preamp valve and because of the low noise level , very suitable in phono stages.
Note: if your system is “warm sounding’ or to “warm” already, this tube is not a first choice. ECC82 tubes of Philips,
Valvo, Siemens or Telefunken are to be considered in that situation.
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 matched and balanced. And fulfills the factory specs of a new/NOS tube.
tube family. The measurement data below show that both tubes are matched and balanced. And fulfill the factory specs of a new/NOS tube.
| Valve 1
V97 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,3 / 1,3 mA
1,8 /1,8 mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve 2
V110 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,2 / 1,2 mA
1,8 /1,8 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Telefunken factory specification see test page)
Short description
| Tube type | ECC82 |
| Quantity of Tubes | One pair |
| Brand | ADZAM (Mullard) |
| Manufactured in | Blackburn UK |
| Dates | 1964 (I61 B 4D3) |
| Construction | Ribbed grey plates |
| Getter Construction | Halo getter |
| Print Condition | Nice; see pictures |
| Box included | Generic Adzam boxes |
| Equivalent tubes: | 12AU7, ECC802S, CV4003, 12AU7A |
| General test results | NOS |
