KT88/90 F2011 Schematic

shumgary · 30th April 2007, 10:47 AM

Hi,

I want to build a KT88/90 tube amp with using TAMURA F-2011 Output Transformer.

I need to drive my TAD 15" woofer TL-1602 directly.

Where I can find the schematic?

Thanks
Gary

AndreasS · 30th April 2007, 03:59 PM

Hi Gary,

the KT88 needs a Raa between 4 kOhm and 9 kOhm in push-pull circuits,

http://frank.pocnet.net/sheets/086/k/KT88.pdf

the Tamura F-2011 has a Raa 3,5 kOhms. You can use the Tamura F-2012 (with 5 kOhm) or connect the KT88 in triode mode for good damping factor (output power 20...30 Watts).

Regards
Andreas

30th April 2007, 10:47 AM	#1
shumgary diyAudio Member Join Date: Jul 2006	KT88/90 F2011 Schematic Hi, I want to build a KT88/90 tube amp with using TAMURA F-2011 Output Transformer. I need to drive my TAD 15" woofer TL-1602 directly. Where I can find the schematic? Thanks Gary

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30th April 2007, 03:59 PM	#2
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	Hi Gary, the KT88 needs a Raa between 4 kOhm and 9 kOhm in push-pull circuits, http://frank.pocnet.net/sheets/086/k/KT88.pdf the Tamura F-2011 has a Raa 3,5 kOhms. You can use the Tamura F-2012 (with 5 kOhm) or connect the KT88 in triode mode for good damping factor (output power 20...30 Watts). Regards Andreas

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