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30 Oct 2008
Scalable tube amplifier circuit which will work with a number of octal tubes (KT77, 6CA7, EL34, 6L6GC, KT88, 6550, KT90). Driver stage is an SRPP 12SL7 tubes and the output stage is a Class A UL SIPP with KT88 tubes. LM317HV Regulators are used for the cathode CCS.
Class A Ultra Linear (UL) 12SL7 SRPP / KT88 SIPP Tube Amp - [Link]
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