Not made anymore, can try TR1011 replacement
https://www.radiomuseum.org/tubes/tube_tr1011.html

Long term business then, since no one I am aware of is starting, few competitors.
Plenty of existing demand, hell Marshall, Mesa Boogie, Fender going to headache if their supplies stop now, not to mention the HIFI world.

Been entertaining thoughts of starting a vacuum tube manufacturing plant like since 2019 when Shuguang factory in China was destroyed by fire and no production since.
EHX have just declared that there is no more vacuum tubes for the foreseeable futures, so JJ tubes from Slovakia is the only choice left if you want EL34, 6L6.

Now Western Electric is reissuing 300B for 1500 USD for a piece of glass that heats up and burn, I say why not start a business that have great demand from audio and guitar amplification which have very few competitors?

omg need conversion kit ? will totally destroy the look

only old people know this thing. old people market besar meh ?
unless it from Apple or Samsung.

dear, TS. the hot industry now is marijuana and NFTs la.

dear, TS. the hot industry now is marijuana and NFTs la.

Dude if it's needed & in 'demand'
Honghai, will do it! No need you!

Go check, who is Honghai!