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KT88/90 F2011 Schematic
KT88/90 F2011 Schematic
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Old 30th April 2007, 10:47 AM   #1
shumgary is offline shumgary  Hong Kong
diyAudio Member
Join Date: Jul 2006
Question KT88/90 F2011 Schematic


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?

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Old 30th April 2007, 03:59 PM   #2
AndreasS is offline AndreasS  Germany
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,


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).

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