Home » Audio » Thermionic Emissions » KT-88 continued
KT-88 continued [message #10747] Tue, 05 October 2004 19:21 Go to next message
Manualblock is currently offline  Manualblock
Messages: 4973
Registered: May 2009
Illuminati (13th Degree)
Has anyone accessed the amp in June's AudioeXpress designed by Satoru Kobayashi? Its a hybrid voltage driver circuit consisting of an IC phase inverter, a differential valve amplifier and a cathode follower with no negative feedback. 60 watts out and very stable with good specs. KT 88's seem to be expressing nice curves in triode mode. J.R.

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Re: KT-88 continued [message #10750 is a reply to message #10747] Sat, 09 October 2004 13:05 Go to previous messageGo to next message
Cobra is currently offline  Cobra
Messages: 1
Registered: May 2009
Esquire
Very interesting indeed! I must get this AudioXpress issue!
Tell me more, please!

~>Cobra

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Re: KT-88 continued [message #10751 is a reply to message #10750] Sat, 09 October 2004 14:16 Go to previous messageGo to next message
Manualblock is currently offline  Manualblock
Messages: 4973
Registered: May 2009
Illuminati (13th Degree)
Mr. Cobra; I must state I have not built this amp, I only offer it up as an example of the use of KT-88's as a followup to the continuing KT-88 posts on this site. Some have expressed interest in those tubes and the circuits built around them. The article states a very thorough build write up. It includes performance graphs and a description of the sound. Good stuff. I think KT-88's might work for me because they run on moderate plate voltages and have good power output with a lively sound and low distortion in Push-pull. Configured in triode mode they have very low 2nd order distortion figures and PP cancels most 3rd order. J.R.

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Re: KT-88 continued [message #10752 is a reply to message #10751] Mon, 11 October 2004 02:51 Go to previous messageGo to next message
kyle is currently offline  kyle
Messages: 17
Registered: May 2009
Chancellor
Do you mean that PP cancels even order distortion?

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Re: KT-88 continued [message #10754 is a reply to message #10747] Mon, 11 October 2004 19:41 Go to previous message
GarMan is currently offline  GarMan
Messages: 960
Registered: May 2009
Illuminati (2nd Degree)
J.R.

I know you're looking for ideas for KT-88 amps. Here's one that's a little different than what you've been looking at. Parallel Single Ended.

If PP is your cup of tea, here's one that looks too simple to be true:
http://www.audiodesignguide.com/my/pp3.html


Gar.

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