Vfet / SIT Amplifiers

@kitr Pass labs keeps spare SIT output devices for warranty repairs.. 
being that these SITs are built to military spec and can handle extreme conditions, according to pass labs support… I doubt there will be too many issues. 

@mikem, that is great to know, thanks for sharing.
Since the NP designs are single output transistor designs, means that replacements should be drop-ins...which is great!
....hope I never need them for my FW

The C1 isn’t the only vfet preamp, the first Audio Note (kondo) M7 was vfet based but I’ve never seen one for sale. 

@thebiglebowski, not sure I follow.

The AN M7 looks like a state of the art preamp, which I would not mind owning, but it sure is not a vfet based preamp.
ECC803S x2, 6072 x2 (Phono)
6072 x4 (Line)
EZ81 x1 (Rectification)

perhaps you are thinking of a different preamp?  The C-1 :)

@thebiglebowski, sonetduo is right, it's not a vfet preamp, at least according to the official specs


I just got the Hitachi working. Well, she's not a bad amp, but she's not even close to the B-2 or the B-3. Sure, she's an integrated amp and wasn't even hi-end at the time of the release, but I soft of expected more. Every possible aspect of the sound is worse, except maybe for the bass response, which is quite good.

C1 is still under repair, as well as N7B. I hope it's going to be done soon.