Nuvista Tubes - General

George, is your statement about a hybrid being a "sales pitch" in your opinion specific to MF, or in general and applicable to any hybrid amp manufacturer?

I just look at where he used them in the Trivista sacd, that they could be bypassed and probably get better sound/transparency without any circuit design negatives. And that they were maybe from army surplus, and just used to "maybe" give a product more cred/appeal to the "tube set". 

Same what I saw in the MF A3-24 dac a good dac, but two massive power supply chokes (army surplus?) on already very nice super low noise, very stiff low impedance solid state power supplies, what for?? just to make them not stiff again??? Again appeal to some that love chokes in tube equipment?

Cheers George   

I just look at where he used them in the Trivista sacd.......
.....Same what I saw in the MF A3-24 dac...........

@georgehifi

I take this to mean your statement about a hybrid being a sales pitch ** is ** specific to MF.

I take this to mean your statement about a hybrid being a sales pitch ** is ** specific to MF.

No there are others that do it, just to get the Tube guys interested as well.
Just like McIntosh throw an output transformer on the end of what "could be" perfect good solid state amp, absolutely no need for it if the solid state amp is "done right". Try putting an output transformer on the rear of a Gryphon, Krell, ect, and see what happens to the sound. 
 
Cheers George

Heard the Nu-Vista amp back in the early 2000s when it was new.

Opinion?  Good but not something I'd lust after. It was demo'd on unfamiliar speakers and source, however.   Plenty of "air," if that's your thing.

Per OPs question: another (older) use for nuvistors was for the front end of VHF receivers/preamplifiers and were employed in my (early 60s) ham radio equipment. The smaller size meant lower inter-electrode capacitance and therefor higher efficiency. Reliable low noise transistors for higher frequencies were rare and expensive then. Other than that (as already posted) they are just vacuum tubes. Thanks.