12AX7/ECC83:
12AX7A, 12AX7WA, 12AX7WA/7025,
ECC83, E83CC, ECC803, 5751, 6681, 7025, 7729, CV492, CV8156
6C19P/
6C19P
(cyrillic):
no replacement; available factory-direct only from LAMM
NOTE:
we recommend replacing
6C19P tube about once a year to
maintain the best performance of the
preamp
5651A:
5651