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KT66 vs. EL34 in TORII JR (Read 1470 times)
beowulf
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KT66 vs. EL34 in TORII JR
08/04/15 at 22:23:10
 
Has anyone determined/inquired whether or not the KT66 can be used in this amp?
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« Last Edit: 11/11/15 at 00:39:07 by Steve Deckert »  
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Steve Deckert
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If the 1st watt
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Re: New TORII JUNIOR amplifier for Summer!
Reply #1 - 08/05/15 at 03:31:21
 
The Reason EL34's were selected for the TORII JR is because they seem to be the best sounding and have the most power with the custom UFO ultra-linear transformers.  TORII's have always been an EL34 based design until the MK4 where I felt the better linearity and lower gain of the KT66 was a better fit.  In the TORII JR I liked them all, but since the bass is equally tight with all the output tubes I tried, the CCE aka Hazen Grid Mod became more apparent than ever so EL34 is the stock tube in this amp.

[color=#ffffff]The amp uses a fixed bias set to the ideal mills (40) for this particular amp using EL34's.  There will be a single screw adjustment for bias making it possible to re-bias the amplifier for tubes like the KT66 or 6L6 or KT77.

The advantage of making it a fixed bias design is the ability to get the tube dialed in much tighter and without the heat related drift of a potentiometer.  A  more purist approach.

I'm over half done with the owner's manual as I write this. Smiley





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« Last Edit: 11/11/15 at 00:35:49 by Steve Deckert »  
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Steve Deckert
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If the 1st watt
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Posts: 3105
Re: New TORII JUNIOR amplifier for Summer!
Reply #2 - 11/11/15 at 00:39:37
 
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