Beschrijving
Philips Miniwatt I65 version
This is a pair ECC83 produced by Philips Miniwatt in the sixties in Heerlen the Netherlands. The tubes have a ring getter on silver post and ribbed plates (Version I65), see pictures. Very healthy tubes with NOS specs! Tubes with matching systems; see test results.
The tubes look nice (no internal signs of use) and measure new ; see pics glas bottom!
Sonics
The early Philips Miniwatt ECC83 ’s most distinctive sonic feature is its transparent, natural and sparkling midrange presentation, with a light touch of warmth illuminating your music. The bass is incredibly deep but well controlled. The sound image is spacious, deep, structured and holographic. I refer to the many threads on the web for more information. Excellent preamp valve, low noise, very smooth extended highs, very good in phono stages. Recommended!
Note: if your system is to “bright” already, this tube is not a first choice. ECC83 tubes of Mullard, Brimar or Telefunken are to be considered in that situation.
Test results*
| Valve 1
V81 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,2/ 1,2 mA
1,5/ 1,6 mA/V OK |
= NOS
= NOS |
| Valve 2
V178 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
1,3/ 1,3 mA
1,8/ 1,8 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.
Short description
| Tube type | ECC83 Philips |
| Quantity of Tubes | One pair |
| Brand | Philips Miniwatt |
| Manufactured in | Heerlen Netherlands |
| Dates | 1963 / 1963 (3G4/ 3L3) |
| Construction | Ribbed plates |
| Getter Construction | Halo getter on ‘silver’ post |
| Print Condition | Both nice; see pictures |
| Box included | White box |
| Equivalent tubes: | 12AX7, ECC803S, CV4004, 12AX7A |
| General test results | NOS |
