[SteveRB]

Hello,

I got a chance to buy a lot of random Marconi tubes. I haven't been able to find too much info on the brand.

Does anybody have a little information on these?

What type of quality?

Is there any demand for this brand?

Any information is appreciated.

[jameshuls]

As far as 12ax7s go, if they are Marconi Radiotron Canada, then they are made by RCA Canada. I have a black plate pair of both and they are identical. A very lush, meaty sounding tube. That's the only first hand info I have.