[JCarney]

I have a Dayton Audio HTA50BT integrated with 6K4 x 2, 6UI x 2 in the preamp section that I would like to roll a few tubes for fun. Well I'm having a helluva time finding 6UI tubes or even what I could use as an equivalent, and I need some bloody assistance. Thank You to any and all who take pity and guide me in the right direction.

JCarney

[opnly bafld]

6U1 = ECH81 and similar  6И1П
https://www.radiomuseum.org/tubes/tube_6u1.html

Found some on Ebay.

[FullRangeMan]

http://www.gstube.com/catalog/?key=6%C81%CF&submit=Find

The EB version are higher reliability, longer life usually 5000 hours and mechanical ruggedness.

[JCarney]

Thanks guys, much appreciated and helpful. 

JCarney