12AX7A / ECC83-Y, NOS, (last of RUBY brand stock! Selected,...
good power and tone
EL-504 EI
SORRY, SOLD OUT >> Alternative tube: sEL519-R EL519...
EI / NOS this tube has been sold from Siemens as their EL84...
El/Yugo replaces KT88/6550A, used by: Jadis® SOLD OUT ! EI...