Nuvista Tubes - General

George, we will agree to disagree on cap coupling.

That’s why there’s so much rolling goes on with caps as they all have their own coloured sound, the best cap is no cap for the ultimate transparency..

DC management circuitry involved makes it a bit more than no cap.

It's a know fact, that DC servos are much more transparent than cap coupling.


Cheers George

Can you have a look at my question about the Nuvistors in your link

I maybe wrong but I think Anthony Michaelson went to the Nuvsitor when the Trivistor became hard to get, in bulk, or the other way around.

From what I was told by a distributor, he’s known for loitering around military surplus auctions, where he can buy a pallet load of a part for next to nothing, then goes home and designs a specific number of editions using that part.

Cheers George

No. Not necessarily. It depends on everything - circuit, quality of transformers, type of tube, configuration of tube, quality of passive components. Adding tubes is not a panacea for some "tube sound."

Agreed. That's why I prefaced the question by stating "all else being equal".

@georgehifi and @viridian

Thank you both very much. A lot to read through and digest.

From what I gather from your input this far the use of nuvistors in the MF design does not necessarily in and among itself produce the famed tubed sound, and instead and more broadly where other tube amps are concerned, is dependent on the circuit in its entirety.

That’s why there’s so much rolling goes on with caps as they all have their own coloured sound, the best cap is no cap for the ultimate transparency..

Right. But frankly this is something I’d much prefer to avoid. I’m not looking to "tweak" the sound of a particular product, although I can understand the desire and benefit in doing so. Instead, I prefer to "set it and forget it".