77.43.10.3
In Reply to: RE: Not sure I would call that 'classical' posted by Ralph on November 04, 2009 at 08:57:57
Dear Ralph,
It seems that in the asylum everybody is concerned with names.
Just to make myself clear.
Classical in this context does neither refer to the initial Electrovoice patent nor to any particular realization.
It is only a practical way to indicate a topology that most closely resembles the published OTL circlotron schematics.
As far as the constant current sources (CCS) are concerned I regret to say that I am not interested in complicating the schematic simply because of my personal philosophy, that is, "good enough is good enough".
I do not think that a further potential 10 dB reduction of distortion in exchange for an higher parts count is worth the effort.
As the simulations already show, the prospected distortion of this sample circlotron (of the order of 1-2% third harmonic) occurs only at high current levels. High power levels occur in music only for a tiny fraction of time, when the aural masking effect is very strong.
My technical opinion is, if more 'undistorted' power is needed, it is better to add output tubes.
Best Regards
Luca Cellai
ecc230
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