Hi, I am hoping someone can help me identify these power tubes. I think they may be 5881's, but I'm not sure. Her is a link to Photobucket with high-res pics.
http://s169.photobucket.com/albums/u217 ... n%20tubes/ My first guess is that they are Russian, comrade

Judging from the gold lettering. I wanted to use them in a 5E3 type circuit with a SS rectifier, fixed bias, and Blackface Deluxe transformers.
Thanks for the help,
Ivabiggun