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In the Forum: Audio Discussions
In the Thread: How to get a LOT of SET power.
Post Subject: Zero-crossing ?Posted by IslandPink on: 3/23/2011
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There's no zero-crossing with A2 .
833 or equivalent are a good choice for this extreme project and bass performance is excellent, I have heard 833 SE briefly and it has great authority.
The driver would best be some sort of small/medium output valve driving 833 via a step-down interstage. Then the gain of the 833 works in your favour . Various people have done this .
The problem remains the huge size and power consumption of the whole amp , and the core size and gapping required to get sufficient inductance down to 5-10Hz ( for ULF ) while also being gapped for eg.300ma to cover 2x 833 . I'm sure Bud would know how to do this as he works in the power transformer game . He can give you the bad news about how big it will be ;o)
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