KT88/90 F2011 Schematic - diyAudio
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Old 30th April 2007, 11:47 AM   #1
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Join Date: Jul 2006
Question 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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Old 30th April 2007, 04:59 PM   #2
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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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