Carot One Ernestolone, Руководство пользователя

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5. Technical Notes (for professional user only)
Carot One has already pre-set the jumpers and fine-tuned the DC bias voltage
of each ERNESTOLONE with the packaged vacuum tube before shipping.
However, changing different tubes to taste for different sound is the great fun
for many audiophiles and also a great feature of ERNESTOLONE.
There are some important notes should be aware before changing tubes.
ERNESTOLONE supports two major tube series:
(1) 6DJ8, 6922, 6N11, 6H23n, ECC88, E88CC, etc., and
(2) 12AU7, 5963, 5814, ECC82, etc.
If you change the tube within the same series, it needs to re-tune the DC bias
voltages ONLY.
If you change the tube from another series, it needs both to re-tune the DC
bias voltages and re-setthe jumpers. Otherwise, the tube may be burnt out.
The power amplifier jumper setting for Different Tube Series
You can simply configure the amplifier to support the two different tube series
by resetting the jumpers in DP1 in the PCB as shown in section 5.1.
(Remember to power OFF the machine before setting)