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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: 300b dc filament supply modelling posted by alex on September 1, 2006 at 07:02:23:
I and some friends have been trying out different designs for DHT filament supplies. Conclusions are that an ordinary bench adjustable supply will do the job OK. This, or a couple of voltage regs one after the other, then sounds better with a common mode choke on the end of it. But for the best results you need to use a current source - all current source designs sounded better than all voltage reg designs. Interestingly all current sources sounded worse with a CMC at the end of them.
The RonanReg used a couple of voltage regs (LM1084 are fine here) followed by a final current source. That's one good one. A current mirror also sounds very good. There are some even more sophisticated designs about, but a current source is the way to go in terms of sound. The differences are quite audible. The filament supply should not be grounded, incidentally.
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Follow Ups
- Re: 300b dc filament supply modelling - andy evans 04:04:04 09/02/06 (0)
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