Description
Mullard E88CC twin triodes, Mitcham, United Kingdom.
These tubes have a dimple disk getter getter and both are manufactured in 1965 by Mullard Mitcham UK. They are the long life version of a ECC88 tube.
The dimple disk version of Mullard is known as a very fine E88CC; with a liquid, creamy and very detailed sound image. I refer to the web for more information.
The pair is assumed to be NOS. Both tubes are thoroughly tested. And the matched pair has excellent test values that match the factory specifications of a new tube very well and and both tubes have balanced systems. See test results below.
Test results
The measurement data below illustrate that the tubes are matched and internally balanced.
| Valve 1
V203 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
11,0/11,9 mA
11,1 /11,5 mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve 2
V204 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
14,6 /14,5 mA
11,1 /10,9 mA/V OK |
= NOS / NOS
= NOS / NOS
|
Test methods and reference values are outline on the Tube testing page.
Summarized description
| Tube type | E88CC |
| Quantity of Tubes | One pair |
| Brand | Mullard |
| Manufactured in | Mitcham, United Kingdom |
| Date code | 7L1 R5D3 & 7L1 R5B3 |
| Plate Construction | Frame grid |
| Getter Construction | Dimple disk getter |
| Print Condition | Excellent; see pictures |
| Box included | Original boxes |
| Equivalent tubes: | CCa 6922 E88CC |
| General test results | NOS |
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