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Ralph Karsten of Atma-Sphere OTL amps | Meetup
www.meetup.com
... in and is the oldest manufacturer consistently producing OTL (Output TransformerLess) and triode amplifiers. Ralph Karsten designed and patente.
OTL tube amplifiers - DIY Audio Projects - StereoNET
www.stereonet.com
Ive read that output transformers are a critical part of every tube amplifier, and that they are somewhat like capacitors in that they will unavoidably colour...
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