Atma-Sphere MA-1 tube rolling

i too have wondered why russian power tubes are very good (i use el34 and kt88 variants), yet the sound of russian low level tubes like 6922 6sl7/sn7 are rather poor (lacking midrange bloom) and russian rectifiers like gz34's are abysmal in quality and lifespan

ralph, any theories or thoughts as to why this is the case?

always nice to hear advice from the actual maker of nice gear...