Description
Once in a live time pair GEC ECC83
This is a pair of ultra rare GEC ECC83 tubes. The tubes have a ring getter and are in mint condition. Both tubes bear the same product & date codes and are manufactured most likely in 1968. The tubes are most likely really NOS !; no signs of use at all and the GEC label does not show decolouration. Very healthy tubes with NOS specs and excellent matching systems; see test results.
Note: my tubes are often not the cheapest. But is hard to find better tubes !
Sonics
These tubes sound very convincing in my Luxman preamp; full, space clear and with transparency. A sound that is like a long plate Mullard with ECC803S characteristics. An excellent preamp valve with low noise, very good in phono stages. Balanced and smooth sounding with liquid midrange, recommended!
Test results*
The measurement data below show that both systems are precisely matched and balanced. And fully in line with the factory specification for a NOS-tube.
| Valve 1
V294 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,3/ 1,2 mA
1,7/ 1,8 mA/V OK |
= NOS
= NOS |
| Valve 2
V297 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,3/ 1,2 mA
1,7/ 1,7 mA/V OK |
= NOS
= NOS
|
Where NOS is : Ia = 1,1 to 1,4mA, Gm= 1,3 to 1,95 mA/V.
* For test methods and factory specification read the tube testing page.
Please read our test notes and shipping policy before buying !
Short description
| Tube type | ECC83 |
| Quantity of Tubes | One pair |
| Brand | GEC |
| Manufactured: | for M-O Valve Co. Ltd. |
| Code | 1968, etch codes E25-78 with 8H white print |
| Construction | Ribbed plates |
| Getter Construction | Halo getter |
| Print Condition | Both excellent; see pictures |
| Box included | White box |
| Equivalent tubes: | 12AX7, ECC803S, CV4004, 12AX7A, B339 |
| General test results | NOS |
