ALLNIC AUDIO M-3000 MK 3 Посібник користувача - Сторінка 8
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OPERATION
When the power is on, the current meters on the top plate of the chassis will illuminate (See Figure 6). From this
point on, operation is straight-forward. When you are finished listening, turn off your M-3000 MK 3(s)
monoblock(s) first; then, turn off your preamplifier and sources.
off, they will produce a sound through the speakers as the amplifier's relays turn off. Though this sound is
harmless to speakers, some users may prefer not to hear it. To avoid the sound, simply switch the M-3000 MK 3s
to tetrode mode prior to turning them off (see the "On-the-Fly Triode/Tetrode Switching section below).
In the case of any failure, please contact Your Allnic dealer for assistance.
"ON-THE-FLY" TRIODE/TETRODE SWITCHING
You can use the Triode/Tetrode "Mode Selector" button at any time during operation to switch back and forth
from Triode to Tetrode operation. Press the mode selector button on the front panel (See Figure 4) down to have
the M-3000 MK 3 operate in Triode mode; press the button again so it is in the raised position to have the M-
3000 MK 3 operate in Tetrode mode.
THE CURRENT METERS
These illuminated meters indicate the current supply to each of the four KT170 gain tubes in the M-3000 MK 3.
There is one current meter for each KT170 power tube. There is also a potentiometer and a fuse for each KT170 (See
Figure 6).
When you turn on the M-3000 MK 3, the needle of each current meter should be between the two parallel lines on
the meter face. Any error of current supply to or failure of a KT170 tube is indicated by the needle on the KT170
tube's respective meter moving out from between these two parallel lines.
TUBES AND TUBE BIAS
Each M-3000 MK 3 monoblock uses the following tubes:
• Four (4) x KT170
• Two (2) x 6S4
• One (1) x 5654
Because of the individual bias for each KT170, it is not necessary to use a matched quad of these power tubes in the
M-3000 MK 3.
If the needle of a current meter for a KT170 has moved to the left of the parallel lines on the meter face, using an
appropriately bladed screwdriver, adjust the small yellow potentiometer directly in front of the meter for that tube
by turning it clockwise until the needle has returned to between the meter's parallel lines (See Figure 6). If the
meter needle has moved to the right of the parallel lines on the meter face, turn the potentiometer control
counterclockwise to correct.
If the M-3000 MK 3s are in triode mode at turn-
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