10
”BURNING-IN” THE AMPLIFIER
Any tube amplifier requires an initial pre-heating (or "burn-in") period, in order so that it
achieves its full sonic potential. This is due to the presence of residua polarization of
dielectric elements and due to a necessary stabilization of working parameters of the
vacuum tubes. The stabilization of the electrical parameters of the system occurs in a natural
process whilst playing music through your audio system.
A preliminary degree of pre-heating of the amplifier is reached after about 10 hours of quiet
music playback.
The full sonic capabilities shall stabilize and unfold within a time-span ranging from
40 to 60 hours of music reproduction at a moderate volume levels.
In the initial period of operation of the amplifier it is advisable to avoid short-term
operation periods of the amplifier. Once activated, it should remain operational for a
period of about 4-6 hours.
REPLACEMENT OF THE VACUUM TUBES
Your amplifier is equpped with automatic bias module. It’s necessary to use vacuum tubes
that have previously been pre-selected and paired up in quads or pairs.
REPLACEMENT OF 12ax7 DRIVER TUBES for 6n2p or vice versa
1) Disconnect the amplifier from the mains socket, the power supply network.
2) Remove the currently installed tubes from their respective sockets: 2 and 5. Plug in the
new replacement vacuum tubes in these sockets.
3) Set the 12AX7 / 6N2P tube type selector switch ( (9), Page 6 ) to the position which is
correct for the chosen type of replacement tubes.
Execution of the above listed procedure, while the device is not disconnected
from the mains power, may result in permanent damage of the device.
Selection of the wrong position of the 12ax7/6n2p tube type selector switch
may result in permanent damage to the tube and/or of the device.
