Description
Very early Munich production !
This is a pair of ECC82 produced by Siemens & Halske (Philips Miniwatt) in1955 in Munich Germany. The tubes have a typical Telefunken style 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. One of the past has a date code between the pins, the code on the other tube is missing. Both tubes have an etch code indicating that the tubes were selected for the Philips Physical Labs.
Sonics
The Philips family long plate 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
V97 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,2 / 1,3 mA
1,7 /1,8 mA/V OK |
= OK / OK
= NOS / NOS
|
| Valve 1
V110 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,2 / 1,2 mA
1,7 /1,7 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Telefunken factory specification see test page)
Short description
| Tube type | ECC83 |
| Quantity of Tubes | One pair |
| Brand | Philips Miniwatt |
| Manufactured in | Munich Germany |
| Dates | mCP # W 1955, other code is missing |
| Construction | Long ribbed grey plates, copper grid posts |
| Getter Construction | Telefunken style Ring getter |
| Print Condition | See pictures |
| Box included | Generic Philips box |
| Equivalent tubes: | 12Ax7, ECC803S, CV4004, 12AX7A |
| General test results | NOS |
