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Jeffrey D. Medwin

KT88 Direct-Coupled Design

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I'm operating my 807 at 75% of maximum plate dissipation and already have 7000 hours on them.

The amps are turned ON when i get-up and turned OFF when i go to bed. They are driven from TV, radio, bluetooth all day long.

They are still at about 80% of new spec after two years of this regime

 

Dan

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5 hours ago, Danieln said:

I'm operating my 807 at 75% of maximum plate dissipation and already have 7000 hours on them.

The amps are turned ON when i get-up and turned OFF when i go to bed. They are driven from TV, radio, bluetooth all day long.

They are still at about 80% of new spec after two years of this regime

 

Dan

 

Dan, 

 

That is great.  I usually try to reduce tube plate dissipation, by reducing currents much more so than by reducing operating voltages.

 

In the case of S.E. amps, this reduced current helps - with easier operation for the S.E. Output Transformer,.

 

Jeffrey

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