E88CC pair Mullard, NOS specs, same month 1966 (V49/54) reserved Marek

Description

Mullard E88CC twin triodes, Mitcham, United Kingdom.

These tubes have a dimple disk getter getter and both are manufactured in Februari 1966 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 V49	Ia (plate current): Transconductance (Gm): Gas test, Shorts test:	14,3 /14,5 mA    11,2 /11,9 mA/V OK	=  NOS / NOS =  NOS / NOS
Valve 2 V54	Ia (plate current): Transconductance (Gm): Gas test, Shorts test:	14,5 /14,6 mA 10,7 /11,0 mA/V OK	=  NOS / NOS =  NOS / NOS

Test methods and reference values are outline on the Tube testing page.

 

Summarized description