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KT 88 with Leben cs 600

I am interested in trying some KT 88 in my Leben.

I found a post by Jeff Day with some settings for the plate voltage ( R ) switch position as  up or down.

Does it vary with tube set? Or is it optional by sound?

Thanks

mdrone

Showing 1 response by kasperbergholt

kasperbergholt's avatar
kasperbergholt
5 posts
 

Hello,

I know the thread is old, but as it contains information that's partially incorrect, I thought I'd chime in.

"The KT88 and the EL34 are not directly interchangeable. Although some amps can handle both types of tubes. Your Leben is not designed for the KT88".

The Leben manual contains a settings table showing how to use the amplifier with a wide range of output tubes, including the KT88 type.

Tube settings chart from Leben CS-600 manual.
[source]

 6L6GB, 350B, KT66, KT77, KT88 and 6550A tubes are all perfectly usable even though it's correctly stated that the KT88 and EL34 tubes are not directly interchangeable in other amplifiers.

For the driver stage, though, only (fource) 6CS7 tubes can be used in the CS-600 - and only 12AU7A and 12BH7A tubes in the CS-600X (two of each).

So the KT88 tube would be perfectly compatible in both the CS-600 and the CS-600X.

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