Re: KT 88 tubes

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In Reply to: KT 88 tubes posted by gus on April 7, 2001 at 08:55:36:

Gus,
In general (and take this with a big grain a salt), KT-88's can take more plate voltage, at the same bias, compared to the 6550.
Depends. If the 6550 are classic TungSols and the KT-88 are Chinese or Sovteks the difference in settings may not be that great.
Both KT-88 and 6550 put out a nominal 25 watts of plate dissipation per tube. So, roughly (plate disspation, watts) divided by (plate volts)x (1000mA per Amp) = (bias, mA). If you keep the same plate volts, plug in the KT-88 and up the bias, until you get the tone you want.
It may sound a bit more compressed at lower volumes, than the 6550, since, I believe the KT-88 likes more plate voltage and not neccessarily higher idle bias. That's how MOV got more power out of those bottles.
PS: you'll need to fiddle about a bit to get to the tone you want. Oh, BTW, if those are TungSol 6550 and you want to toss them---I'd be happy to take them off your shelf.
steve

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Topic - KT 88 tubes - gus 08:55:36 04/07/01 (8)

Re: KT 88 tubes - so.... 16:24:53 04/07/01 (3)

Re: KT 88 tubes - AEC 13:17:45 04/10/01 (0)

Re: KT 88 tubes - BillC 02:00:40 04/08/01 (1)

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Re: KT 88 tubes - steven oda 12:59:54 04/07/01 (1)

Re: KT 88 tubes - Story 13:12:01 04/07/01 (0)

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Re: KT 88 tubes - steven oda 11:48:29 04/07/01 (3)

Re: KT 88 tubes - Story 12:19:15 04/07/01 (2)

Re: KT 88 tubes - steven oda 12:59:54 04/07/01 (1)

Re: KT 88 tubes - Story 13:12:01 04/07/01 (0)

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