Description
Pair: 12AT7 / ECC81 made in by Brimar UK in original boxes
This is a pair 12AT7WA / ECC801S produced by Brimar UK. The tubes have a bended halo-getter, black and copper grid posts, see pictures. The tubes are the military selection; CV4024.The screen print is nice and the etched codes are clearly visible. These tubes show no signs of use and are most likely NOS. See pictures. The early Brimar is highly regarded. Very healthy Tubes with matching systems; see test results. Each tube is wrapped in paper and protected with a cardboard inner liner. This tube belongs to the most popular and sought after 12AT7 ‘s ever.
Sonics
The acoustic properties of the black plate ECC81 (Brimar production) are outstanding and widely known. I refer to the threads on the web for more information. The preamp valve, low noise, smooth and warm sound with very good vocal presentation, perfect in phono stages.
Test results*
| Valve 1
V117 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
11,3/ 10,9 mA
6,1/ 5,8 mA/V OK |
= NOS
= NOS |
| Valve 2
V118 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,0/ 9,3 mA
6,0/ 5,8 mA/V OK |
= NOS
= NOS
|
* For test methods and factory specification read the tube testing page.
Short description
| Tube type | ECC81 |
| Quantity of Tubes | One pair |
| Brand | Brimar |
| Manufactured in | UK Brimar |
| Date codes | 1I9 & 3I9 |
| Construction | Black plates, copper grid posts |
| Getter Construction | Halo getter |
| Print Condition | Nice; see pictures |
| Box included | Original box (see pictures) |
| Equivalent tubes: | 12AT7, 12AT7WA, 6201, ECC801S, ECC81, CV2024 |
| General test results | NOS |
