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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: I read most of your posts, and find you to be very knowledgeable ... posted by KIS on January 24, 2007 at 18:39:51:
First, KT88 was designed with UL operation in mind. I believe it should be the best option. A bonus is that the load impedance for UL is far less critical than it is for tetrode mode.Second, it's true that triodes give less distortion and less power with higher load impedance, but for tetrodes/pentodes that is certainly not true. The optimum load impedance is quite critical but they do tend to work better into a lower impedance rather than a higher impedance. The load criticality can be reduced by local NFB.
Third, it is true that the higher the turns ratio, the worse the OPT performs. Some people use this as a justification for parallel tubes and/or 16 ohm speakers. However, I don't think this should be an important factor in selecting operating mode.
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- Re: I read most of your posts, and find you to be very knowledgeable ... - Ray Moth 23:33:55 01/24/07 (0)
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