George, thank so much. That's exactly it, the pictured tubes in your link are trivistors not Nuvistors. I was sure that you would have the answer.
Interesting bit of info as well that MF went to the trivistor when the Nuvistors dried up.
Nuvista Tubes - General
May I have opinions please on the pluses and minuses of Nuvista tubes versus vacuum tubes? Supposedly and from the basic homework I've done, Nuvista tubes purportedly offer high reliability, low microphony, low noise, consistency, and small size compared to their vacuum counterparts. So what's the down side?
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Interesting bit of info as well that MF went to the trivistor when the Nuvistors dried up.Musical Fidelity time-line http://www.musicalfidelity.com/about-us/timeline confirms that nuvista 1997 and trivista 2002, but why then (seeking speculation) would their current amplifier offerings utilize nuvistor tubes instead of trivistor? |
This is old stuff gd. As far as production quantities go, you take what you can get. So if you want to make 300 preamps you need to find the appropriate amount of tubes. As George pointed out, they get their tubes at military surplus auctions. You may find a load of Nuvistors one day and a load of trivistors another. When you are buying old stuff you are at the mercy of the market place. |
I have owned the MF Nu- Vista 3D CD player for about 16 years. It is really a wonderful piece of gear. The sound is very "natural," almost analog in nature and is not at all "syrupy." Pretty good for a metal encased micro-tube. As for the Nu-Vista vs Tri- Vista issue, my understanding is that there were a lot of problems with overheating in the Tri- Vista components. I have read a number of posts on various audio forums attesting to that. The Nu-Vistas were designed to stay cooler than the average tube, so that may explain MF's return to its use. |
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