Octave JUBILEE Mono, Руководство пользователя

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11
3. GETTING STARTED
Functional test Power Pre Selector in
position “Bias high”
After checking the readings in the low setting,
you can activate “Bias high”.
Bias high is indicated by the blue LED D. The
reading of the display is increasing slowly to
a value of 800 - 1000. Check the reading of
each of the eight tubes by selecting them one
by one. Deviations from 950 – 1050 are
acceptable. If a reading settles at
substantially higher than 1000; you have to
adjust this tube with its corresponding bias
regulator

.
Bias high reading: 1000
This is now the default setting of the bias
control, which should be maintained.
Functional test, muting
If all values are correct, you can check the
“Muting” function. When the muting function
is active, not only the inputs are short-
circuited to allow signal cables to be
connected; the current to the power tubes is
also reduced to nearly 0.
Checking the bias of the tubes while the
muting function is ON, the reading of the
display shows the value less than 100 of all
tubes. The meter reading will gradually
increase when you switch the muting function
off. This soft start-up prevents pops and
regulation noises being sent to your
speakers.
When the muting function is active, the green
LED B illuminates in the display and the LED
next to the rear panel input selector switch
goes out to indicate that the amplifier has
been muted. (

, rear panel)
End of activation phase
8. When you have confirmed that the amplifier
is operating correctly and have made any
necessary adjustments, you can go ahead
and use the amplifier. However, the amplifier
will not pass a signal to the loudspeakers if
the red LED E illuminates during the start
phase or while listening to music. This LED
lights up to warn you that the electronic
protection circuit has switched off the
amplifier. (see chap. 5.2)