01A question
 

Hi Guys
Advice pls. Been researching the above tube. Notice that aside from 01A numbering,
I see SX 201A, UX 201A, CX 301A etc. Are they all the same tube type.


Many Thanks

All the same type, just what different brands called them.

This should cover most, if not all, of what you need to know about 01a.

VinylSavor: Tube of the Month : The UX201A

Thks guys

Hi Guys
Sorry what good rectifiers should be use to complement the 01A

Thks again

The voltage and current requirements of the 01A are very benign. You can use whatever makes you happy.
If looks are important just look around what type of globe rectifiers you can find cheaply (maybe type 80??) and go with that.

ultrafast diodes :D

If you're thinking of building Ale Moglia's 01A Gen 2 preamp, then that's the best preamp I've ever heard. If you aren't you should be!

01a Preamp (Gen2) | Bartola Valves

Andy, what is it you feel Gen 2 preamp does better than all else?

It's transparent, airy, almost as if it isn't there at all. I found it quite magical. Better than a 26 preamp with LL1692 in 2:1. Better than a 4P1L preamp. That's a lot of "better".

But be clear that this is a complex design which needs to be built EXACTLY according to the schematic - absolutely no short cuts. Every component is there for a reason.