ALLNIC AUDIO L-8500 OTL/OCL, Руководство пользователя

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the light over the line source button that is depressed will illuminate
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after about 40 seconds, the light over the “operate” button will illuminate. The L-8500
OTL/OCL has a “soft start” delay for the tubes in order to extend tube life.
FINAL/3
rd
GAIN STAGE BALANCING USING THE CURRENT METERS
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 in the L-8500
OTL/OCL, 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 any damage; in fact, it can hardly even be measured.
Initially, and from time to time as may be necessary (this should be very infrequently, if ever,
for example, when replacing a 12B4 tube), the meters are used to roughly balance the 12B4
third gain stage tubes for DC control in both channels.
Using a small, flat blade screwdriver, turn the screw head located immediately above each of
the meters on the L-8500’s face (see Figure 4) clockwise and counter-clockwise until the
needles of both meters are between 10 o’clock and 2 o’clock. It is not necessary for the needles
to be between the two lines in the centre of the meter. It is also not necessary for the meters to
be exactly in exactly the same location; anywhere between 10 o’clock and 2 o’clock is fine.
Please be patient ; it could take some time to get an approximate balance, but once set, it should
rarely, if ever, move.
The Allnic Audio L-8500 OTL/OCL is now ready for operation. At this point, you can power on
your sources and, finally, your stereo power amplifier or mono-blocks.
OPERATION
From this point on, operation is straight-forward. All functions are controlled from the front
panel or the remote control. Of course, BE CAREFUL about differences in gain between your
sources. Generally, disc players, other digital sources, and tuners will have greater gain than
phono stages. That means the volume setting for listening to your turntable might be too high
for listening to other sources.
To avoid surges to the speakers, it is best to change from input to input only with the “operate”
button set to mute (the light above the button will not be illuminated when the button is in the
“mute” position).