in my experience
ranked by overall sq (including midrange beauty) - we are talking old stock tubes here, not the new/modern day russian/czech/chinese tubes
best
gold lion gec genalex kt77 (uk made)
close/next best
mullard/amperex el34 (uk or dutch made)
matsushita el34 (seam top) - (japan made using mullard tooling)
close/next best
svetlana sed winged c - russian old stock st petersburg plant
tesla yugo el34 brown base yellow print
not as close, next best
philips/national east german thin bottle dimple top el34
yugo ei fat bottle 6ca7
amps i have/have had in which i developed this ranking - vac pa90c, air tight atm-3, primaluna hp prem dialogue, linear tube audio zotl40 reference, marantz 8b, cj prem 11a xs
ranked by overall sq (including midrange beauty) - we are talking old stock tubes here, not the new/modern day russian/czech/chinese tubes
best
gold lion gec genalex kt77 (uk made)
close/next best
mullard/amperex el34 (uk or dutch made)
matsushita el34 (seam top) - (japan made using mullard tooling)
close/next best
svetlana sed winged c - russian old stock st petersburg plant
tesla yugo el34 brown base yellow print
not as close, next best
philips/national east german thin bottle dimple top el34
yugo ei fat bottle 6ca7
amps i have/have had in which i developed this ranking - vac pa90c, air tight atm-3, primaluna hp prem dialogue, linear tube audio zotl40 reference, marantz 8b, cj prem 11a xs