ALLNIC AUDIO L-8500 OTL/OCL, Руководство пользователя

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When you are finished listening, turn off your stereo power amplifier or mono-block amplifiers.
Then turn off the L-8500 OTL/OCL by depressing the power button on the front panel. The
power switch on the left side panel should stay in the “on” position – this will keep key circuitry
warm, and your L-8500 OTL/OCL will be ready to play when the soft-start turns on the L-8500
OTL/OCL next time you want to listen. Turn off your sources last.
CURRENT METERS
As previously noted, there is one current meter for each channel on the front of the L-8500 (See
Figure 4). These meters indicate the potential for DC from the output of the third gain stage
tubes, the 12B4s. The needles of the meters should be between 10 o’clock and 2 o’clock.
However, because of the floating power supply circuit, even if a needle falls to the extreme left
or right of a meter, there is no danger to the connected amplifier or speakers because any
possible DC leakage will be so small it cannot do damage; in fact, it can hardly even be
measured. The variations in readings are due to the characteristics of individual tubes; no two
tubes are exactly alike in every way.
If a needle falls to the extreme left or right of the meter, try switching the front 12B4 tube of
the channel showing the drop for the rear one. If that doesn’t help, try switching the 12B4s
from one channel to the other. If that still does not rectify the situation, one or both of the
12B4 tubes in the affected channel may need to be replaced.
Within the tube warranty period, if any 12B4 tube is outside spec as described above, please
contact your Allnic dealer or other authorized Allnic representative for assistance. Outside the
tube warranty period, Allnic Audio and its authorized representatives are still available to
consult for advice.
TUBES
The L-8500 OTL/OCL uses the following tubes (see Figure 5):
•
Two (2) x 6AN8
•
Two (2) x 12AU7
•
Four (4) x 12B4
All consequences of changing or attempting to change tubes are borne by the user unless by
express agreement between the owner and Allnic Audio or its authorized representative. Allnic
Audio and its authorized representatives are not liable in any way whatsoever for any injury or
loss incurred by the user or for damage to the L-8500 OTL/OCL, any of its parts, or tubes or
replacement tubes resulting from the user changing or attempting to change tubes.