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Old 4th April 2013, 05:48 AM   #1
Green77 is offline Green77  Sweden
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Join Date: May 2007
Location: MJOLBY
Default OPT to KT88?

Hello all.

I have build a few PP with KT88 and a 6,6K OPT.
Will a 8K OPT work in a PP amp with KT88?

Regards/ Daniel
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Old 4th April 2013, 05:50 AM   #2
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Yes, it will work, albeit output power will be lower.
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Old 4th April 2013, 10:17 AM   #3
roline is offline roline  United States
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You will have more class A output power, but less overall power. You can also use 4ohm speakers on 8ohm taps to reflect a lower impedance onto the tubes so the 8K would appear as a 4K.
The KT88's drive ability will be wasted or not utilized, you could substitute lesser valves like the Russian 6P3S depending on B+. Other tubes that can easily drive 8KRaa would be the 6P3-E, 6L6GC, 5881, EL34 and the larger tubes, KT66, KT77, 6550, KT88.
SO many tubes, SO little time!!!
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Old 4th April 2013, 10:23 AM   #4
Green77 is offline Green77  Sweden
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Thanks //Daniel
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