Description
Telefunken CCa twin triodes, made by the Telefunken works, Ulm, Germany.
The CCa is the super SQ version of the already outstanding E88CC. It is considered as the summit of the ECC88-family by many. The tube has a grey shield and declined getter support. The tube is manufactured in 1962. HQ version of a E88CC tube. One of the finest E88CC; more spacious, neutral and more detailed sound image. I refer to the web for more information.
The tubes are thoroughly tested. The pair has excellent test values that match the factory specifications very well and and both tubes have balanced triode systems. See test results below.
Test results
The measurement data below illustrate that the tubes are perfectly internally balanced.
Test results*
Valve 1
V419 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
14.6 / 14,6 mA
10,7 /10,7 mA/V OK |
= NOS / NOS
= NOS / NOS
|
Where NOS is : Ia = 14,2 to 15,8mA, Gm= 10,5 to 14,9 mA/V.
* For test methods and factory specification read the tube testing page.
Summarized description
Tube type | CCa (ECC88) |
Quantity of Tubes | One |
Brand | Telefunken |
Manufactured in | Ulm, Germany |
Date code | U3112101N |
Plate Construction | Frame grid with grey shield |
Getter Construction | Inclined getter support |
Print Condition | Very nice; see pictures |
Box included | Original Telefunken boxes |
Equivalent tubes: | CCa 6922 E88CC |
General test results | NOS |
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