Russian 6H23 Type 2 & Type 3 Tubes

Can someone explain the difference between these two tubes?

pubul5701-28-2005 8:53pm

bigtee Details Discussions Posts This discussion Message User 803 posts 01-29-2005 at 04:52am Copy Comment URL Report Comment Edit Delete Look up the Upscale Audio site. There is an explanation of the difference listed under these tubes.