Description
Mullard UK production of the sixties!
This is a pair ECC82 produced by Brimar in the sixties in Blackburn, United Kingdom for Daystrom. The tubes have ribbed grey plates and a clear inner, see pictures. Very healthy tubes with NOS specs! Tubes with matching systems; see test results. The etch code on the tubes (Gf1 B 2B4, see pictures) shows that in both tubes are the same version and production week.
Sonics
The overall sound character of British made tubes is warm and lively with a very spacious sound stage. The top end is silky and pleasant and doesn’t get rolled off. They retain a fine sense of “air” at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with impressive realism. They are also known for a rich bass.With respect to the previous these Mullard ECC82’s are no exception.
Note: if your system is to “warm” already, this tube is not a first choice. ECC82 tubes from Philips, Valvo or Siemens & Halske 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 show that both tubes are matched and balanced. And fulfill the factory specs of a new/NOS tube.
| Valve 1
V334 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,3 / 10,6 mA
2,2 / 2,1 mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve 2
V335 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,3 / 10,3 mA
2,1 / 2,1 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Telefunken factory specification see test page)
Short description
| Tube type | ECC82 / 12AU7A |
| Quantity of Tubes | One pair |
| Brand | Daystrom Mullard |
| Manufactured in | UK, Blackburn |
| Dates | 1962 / 1962 (Gf1 B 2B4) |
| Construction | Ribbed grey plates |
| Getter Construction | Ring getter on copper post |
| Print Condition | See pictures |
| Box included | White box |
| Equivalent tubes: | 12AU7, ECC802S, CV4003, 12AU7A, E82CC |
| General test results | NOS |
