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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: Sweetness VS Load Lines posted by Tre' on August 11, 2006 at 13:22:49:
Aha, finally ... I see the problem Tre! I once thought as you do that a tube is just a variable resistor until I was corrected. Consider a tube as a (fixed) voltage source with a series rp and maybe things will fall into place ... it did for me in respect to OP impedance and a tube's ability to drive a load symmetrically both positive and negative. If a tube were like a variable resistor it couldn't do this. To take it a step further it is the changing nature of the tube's series rp with changing current that gives rise to the tube's distortion.One day when you have some spare time (ha), experiment with this on the bench.
Also I did not wish to imply that two SE cascaded stages are push pull. All I'm saying is that it is possible to achieve some of the properties of PP's cancellation abilities with careful selection of the right tubes, loads and operating points. Indeed I believe it's possible to cancel some of the odd harmonic distortion as well.
Cheers Tre and look me up if you ever do find your way down under.
Naz
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Follow Ups
- Re: Sweetness VS Load Lines - Naz 19:05:07 08/11/06 (1)
- Post above is out of sequence ... should be last for this thread! - Naz 21:43:39 08/12/06 (0)
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