output transformer impedance choices

Curly Woods · 24th January 2007, 10:33 PM

My new amp project is down to selecting OPT trannies and I am torn between 3.4K and 4.5K options for my KT88PP circuit. I know that the 4.5K will have a little lower distortion and that the 3.4K will provide more output power. What else is there to consider between my choices for a KT88 PP amp?

TIA

Tweeker · 24th January 2007, 10:45 PM

Operating point, and how the KT88s are connected.

Curly Woods · 24th January 2007, 11:16 PM

500V / ultralinear

Tweeker · 24th January 2007, 11:26 PM

Id probably go 4.5K. As you go more toward triode, and higher in voltage, larger loads are more desirable.

24th January 2007, 10:33 PM	#1
Curly Woods Banned Join Date: Nov 2005 Location: McKinney, TX	output transformer impedance choices My new amp project is down to selecting OPT trannies and I am torn between 3.4K and 4.5K options for my KT88PP circuit. I know that the 4.5K will have a little lower distortion and that the 3.4K will provide more output power. What else is there to consider between my choices for a KT88 PP amp? TIA

24th January 2007, 10:45 PM	#2
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Operating point, and how the KT88s are connected. __________________ Be sure your foil hat has a good low impedance ground.

24th January 2007, 11:16 PM	#3
Curly Woods Banned Join Date: Nov 2005 Location: McKinney, TX	Sorry 500V / ultralinear

24th January 2007, 11:26 PM	#4
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Id probably go 4.5K. As you go more toward triode, and higher in voltage, larger loads are more desirable. __________________ Be sure your foil hat has a good low impedance ground.

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