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In the Forum: Melquiades Amplifier
In the Thread: A different breed of 6C33C amplifier.
Post Subject: 6C33C mono block @ clippingPosted by KOTriode on: 4/6/2012
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Paul,
I tried this tube in few other amps and also on a phono amp and I like the sound of this tubes, perhaps it matched with the speakers/amp combination better than other, still there are lots of other tube out there that I would like to try.
Romy,
The trace that I posted on previous page is at 1Khz , I always used this frequency as reference. Attached is the trace tabout 24W @ 1Khz where both top and bottom show clipping, the regulated power suppy and adjustable bias made it easy to tune this amp.The bias adjustment is a trade off:- If you adjust bias so that clipping is symmetrical (lower bias current), then at lower power the distortion is pretty high, you can check that the sine wave is not symmetrical is lower level.- If you adjust the bias current for lowest distortion at power before clipping occurs (bias current is much higher), the distortion is much lower and the sine wave is more symmetrical, however when heavy clipping occur, the the sine wave is not symmetrical.
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