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In Reply to: Re: 6S45-PE PSE... posted by Kuei Yang Wang on March 14, 2003 at 02:33:48:
NO NEED TO SHOUT ! Jeez , no wonder you're not flavour of the month round here . I am familiar with the design , I still think this new design is flawed ....FB
Follow Ups:
Koinichiwa,So, the design is flawed. Fine. If you say so, please explain how.
It is obviously NOT flawed when it comes to DC balance, as both Valves operating points are fully adjustable. So no flaw there, even IF using torroidal mains transformers as outputs. Also, the sub 3k differential drive impedance to the torridal mains transformer abused as output will give good bandwidth.
It is obviously NOT flawed where it comes to AC balance as it CAN be adjusted for optimum balance. Or IF we desire a better overload behaviour and a harmonic spectrum more akin to an SE Amplifier with lower levels of 3rd harmonics than a "theoretically ideal" amplifier we can deliberatly unbalance the Amplifier.
When it comes to noise rejection et al the circuit matches the original "semper musica". Again, no flaw I could note.
As it is in many ways NOT a push-pull amplifier, other than the way the transformer is driven, applying PP logic foes no-where.
So, where is the flaw. Please enlighten me.
Sayonara
PS, may I mention that similar circuits where in use in the 1920's and 1930's with Pentode PP Outputs. They worked then...
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