Pubul-
My tubes were not the "L" version but I have had similiar results with other EL-34 based amps over the years. A Dynaco ST-70 & Sound Valves M-40 both responded to non-russian/non-chinese EL-34's with great improvements in dynamics and range.
It may be worth a tryout since you can resell good tubes easily. You have nothing to lose really by comparing and a non-russian EL-34 certainly will not hurt your amp.
Is this not the nature of this hobby to try new things?
My tubes were not the "L" version but I have had similiar results with other EL-34 based amps over the years. A Dynaco ST-70 & Sound Valves M-40 both responded to non-russian/non-chinese EL-34's with great improvements in dynamics and range.
It may be worth a tryout since you can resell good tubes easily. You have nothing to lose really by comparing and a non-russian EL-34 certainly will not hurt your amp.
Is this not the nature of this hobby to try new things?