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26 and 46/4P1L driving HypexUcD180

I haven't tried this yet, but intend to. 26 and 46 are my all-time favourite tubes and I want them in the amplification system, right now with 300b outputs.

But with the price of 300b tubes and since my system stays on most of the time I'm looking for another output stage that doesn't fry money, and read good reports of using just the output stage of the Hypex UcD 180 bypassing the input stage on the board. There's a thread on DIY Audio about "hybrid hypex" showing exactly how to do this.

Needs a SE to PP interstage - I'm looking at LL1689 which will do 4.5:1+1. Input impedance of the Hypex final stage is 1.8K. The 4P1L may be a 46 substitute in starved filament to lessen microphonics.

andy



Edits: 03/15/12

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  • 26 and 46/4P1L driving HypexUcD180 - andy evans 02:14:07 03/15/12 (0)

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