Description
Mullard ECC88 twin triodes, Mullard, Mitchum.
This is a pair Mullard E88CC tubes made by Mullard in the UK (Mitchum plant). Tube has silver shields and dimpled disc getter. Very strong tube with matching systems. Very reliable, long life and low noise version of a ECC88 tube only used for military or postal purposes. The tubes have NEW specs. The properties of the Mullard E88CC are legendary and widely known. I refer to the many threads on the web for more information. The codes on the glass indicate that they are manufactured the 1965 and 1966.
The tubes are thoroughly tested. The matched pair has strong test values that match the factory specifications 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
V50 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
14,6 /14,5 mA
11,2 /13,3 mA/V OK |
= NOS / NOS
= NOS / NOS
|
| Valve 2
V54 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
14,5 /14,6 mA
10,6 /11,0 mA/V OK |
= NOS / NOS
= NOS / NOS
|
Test methods and reference values are outline on the Tube testing page.
Short description
| Tube type | E88CC |
| Quantity of Tubes | One pair |
| Brand | Mullard |
| Manufactured in | Mitcham, UK |
| Date codes | 7L1/R5B2, 7L1/R6B4 (1965/1966) |
| Plate Construction | “Spangitter” |
| Getter Construction | Dimpled disk getter |
| Print Condition | Excellent; see pictures |
| Box included | Original Mullard white box |
| Equivalent tubes: | CCa, ECC88, 6922 |
| General test results | NOS |
