Description
Very early Valvo Hamburg production !
This is a pair of ECC82 produced by Valvo (Philips Miniwatt) in1957 in Hamburg Germany. The tubes have a tilted ring getter and long ribbed grey plates, see pictures. The tubes are in excellent condition! Very healthy tubes with NOS specs! matched pair with balanced systems; see test results.
Sonics
The long plate tilted ring ECC82 tubes are considered as the best of the best; “they bring the concerthal to your room”; deliver an open holographic sound stage with warmth and detail. I refer to the many threads on the web for more information. Excellent preamp valve, low noise, very smooth extended highs, very good for all HiFi applications. Balanced, warm and smooth sounding, recommended!
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
V331 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
10,2 / 10,0 mA
2,2 /2,1 mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve 1
V329 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
9,7 / 10,0 mA
2,1 /2,2 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Telefunken factory specification see test page)
Short description
| Tube type | ECC82 |
| Quantity of Tubes | One pair |
| Brand | Valvo (Philips) |
| Manufactured in | Hambug Germany |
| Dates | November 1957 (k62 D 7K)
August 1957 (k62 D 7H) |
| Construction | Ribbed grey plates |
| Getter Construction | Tilted Ring-foil getter |
| Print Condition | Excellent; see pictures |
| Box included | Generic Valvo box |
| Equivalent tubes: | 12AU7, ECC802S, CV4003, 12AU7A |
| General test results | NOS |
