KT100 (=KT94) SINO, replaces also KT88/KT90/6550 (NOS Surplus)
[NN292]

KT100 (=KT94) great dynamics, nice appearance like old GEC/UK tube

KT100 and KT94 are identical tubes with slightly different glass envelope. KT94 is rounder type as seen on picture
KT100 has straight glass but identical internal system