thoriated tungsten 300b tubes

[braubeat]

Anybody tried these tubes.

https://www.amazon.com/Shuguang-300b-t-Nature-Matched-Vacuum/dp/B011QVOVL0

They claim to have thoriated tungsten filaments which could be a very good thing.

Much cheaper than the Elrog 300b with thoriated tungsten.

Sadly, I cannot afford them right now but they could be good.

Michael

[Doc B.]

from the description-

"can withstand the test of Salt"

good enough for me.

[johnsonad]

from the description-

"can withstand the test of Salt"

good enough for me.

 

[Deke609]

"can withstand the test of Salt"

A prized quality for salty dogs who enjoy music on the high seas. "Arrr, matey, now there's a seaworthy tube worth many a doubloon."

[Doc B.]

I was thinking of salt test that is a little more dry.

[Paul Birkeland]

I would strongly advise against using those until a datasheet is published.

There is a Chinese 845 with an oxide filament that has been for sale for a while, and the filament current required is vastly different than what an 845 would want, so it's a sketchy substitution at best!

[johnsonad]

How does the phrase go? Smoke em if you got em?

They Elrog’s sounded great to my ears but lasted less than a year. I’ll stick to EML and the tried and true EH tubes.  I learned my expensive lesson.

[braubeat]

Thoriated tungsten DHT's do generally use more current than oxide coated. So that is something to be carefully checked out.

Michael