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New KT150 tubes?

Has anyone any experience with these pretty new tubes. There are already one or 2 amps I know of, that use them. The review of one of these amps in a UK magazine suggested they were a little warmer and more natural sounding than the nearly new KT120's

The article also suggested they were a straight swap for KT120 based amps, with no adjustment necessary. They are more than twice the cost of KT120's, but still not too costly compared with NOS tubes. I know changing from KT88's or 90's to 120's. did require some amp modification. I have an ARC reference 75 and might want to try the new tubes at some point, ARC don't seem to have a customer E-mail service, to ask the question
david12

Showing 1 response by joe_appierto

joe_appierto
81 posts
 
According to the New Sensor data sheet on the KT150, the heater current is not less than 1.75A and not more than 2.0A and for the KT 120 it's not less than 1.7A and not more than 1.95A. So, they're pretty close in that regard.

There may be other characteristics, physical, mechanical or electrical that may preclude using the KT150 in applications that are designed for the KT120. Physical size is an obvious one.
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