12AX7/ECC83:
12AX7A, 12AX7WA, 12AX7WA/7025 (SOVTEK), 12AX7WXT (SOVTEK),
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
12AX3:
12BE3, 12BT3
NOTE:
we recommend replacing both 12AX3 tubes
about once a year to maintain the
best performance of the preamp