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KT150 Reliability Issues

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Vinyl Valet

In Reply to: RE: A tube journey with lesson learned, Re; KT88 & KT150 posted by Mr_bill2 on January 19, 2024 at 09:37:25

I had a Zesto Bia 200 Select that ran four KT150s (two per channel) in class A. I lost three of the four in 200 hours or less; one for loss of vacuum and the other two with sparks and loud pop. The amp ended up being too hot for the AZ summers and I sold it with a new quad of KT150s. A costly experiment.

Open up your mind, in pours the trash. - Meat Puppets, 1987

Edits: 01/22/24

Follow Ups:

RE: KT150 Reliability Issues - Mr_bill2 07:57:53 01/22/24 (0)
Just think if you had used KT170s! For the 150s to blow up, something wasn't right? Biasing or tube selection was off? Pity for such an expensive amp.

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