2A3 vs. 300B single end triode....

I like 'em both. But I love my 45s even better!

Much depends on the amp design that the tubes are in, but the 300B tends to be known to have plenty of bottom end and higher power at 8 watts, and the 2A3 is more famous for transparent detail with less power at about 4 watts. Triode freaks, like myself, find themselves going for lower and lower power, and more detail, delicacy, and transparency.

I find that the 45 is a great combination of "just enough power" to drive an efficient speaker, and give an awesome display of "thermionic coolosity" as Harvey(Dr. Gizmo) used to say. My 45 SE ZOTL is enough to make alot of people's jaws drop all the way to the floor.

Clueless,
How about a choke-coupling from 6SN7 to 45?
With battery power, and ZOTL output from the 45s?
And DHT with 250kHz AC on the filaments?

Craig, I'm just teasing. I love this amp!
You guys are the only ones that I can share it with, because nobody else I know can even comprehend what I'm talking about with this amp. I hope you don't mind that I mention it from time to time, because I just need to share the joy that I am getting from it.

Hi Bill, I suppose that you like those NOS Sylvania 6SN7 tubes in the Microzotl. You might try the same thing in your preamp and amp. I always thought that the Sylvanias were the best of the 6SN7 tube family. They will definitely make a difference.
A real nice inexpensive 300B is the JJ Tesla. They do real well for only about $100.