[Mariusz]

Always wanted to be able to find some answers or info regarding questionable tubes, its origin, specs etc. Some tubes are missing markings or other obvious characteristics. Some are re-branded. Most European symbols differ from those made in U.S. There are many experienced tube-o-philes among us to answer some of those questions. I hope this thread is within the circle's guidelines, if not please move it to more appropriate place.

To start things off, I would like to get some wisdom on ID-ing these 300B tubes that came with this amp?
(no markings of any kind)

Can you tell which 300b is it or better pics will be necessary?

Thanks in advance

Mariusz

[Mariusz]

I try to ID this tube for a while and it looks like inexpensive copy of Western Electric 300b - Shuguang 300B for $189 a pair. Anyone have any experiance with those tubes?
I am looking for worthy replacements/spares (2 pairs) under $500. Any suggestions?

[captmobley]

On Audioasylum Tube section there is a quad of Sophia Princess for 3 bills.  I had a pair of them in my Welborne Laurels and was impressed until I bought a pair of Sophia black carbon plates which took them up to the next level.  Check around and I think you'll find most folks like the Sophia's for the $$.

[Mariusz]

Thanks a bunch. 
You have PM.

P.S
Yeah, those and JJs were on my short list.

Cheers
Mariusz