Octave V 70 Class A, Руководство пользователя

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3. GETTING STARTED
3.5 Checking the power tubes (BIAS)
The V 70 Class A has an auto-bias device , which means that you no longer have to adjust the
quiescent current of the tubes yourself. The four power tubes adjust themselves to the correct qui-
escent current (BIAS) due to the Class A circuit concept. The quiescent current remains constant
even with aging of the end tubes.
In order to check whether the tubes are all working properly, there is a control option, the BIAS
control display that indicate the correct BIAS with LEDs
Turn the mode selector knob clockwise to position 6 = BIAS. The input LEDs will extinguish.
Five LEDs will now illuminate: The power LED and the 4 BIAS LEDs in the center of the display,
one for each power tube. If the amplifier is still cold, the LEDs will initially illuminate "yellow".
Please wait five to ten minutes.
After an additional 5 minutes, the BIAS control LEDs will change from yellow to green. This
indicates the correct bias and the unit is ready. If you notice any irregularity in the display please
refer to chapter 7.3.
3.6 Connecting other components
Procedure

 Be sure to switch off the V 70 Class A again!
 Connect the other components in your system to the appropriate sockets on the rear of the
V 70 Class A. (See chapter 5 "Rear panel connections". See also chapter 3.7. "Connection
options: overview")

Check that the switch positions on the front and rear of the amplifier are in their
recommended settings.
 Switch on the V 70 Class A using the on/off switch and wait until the Soft-Start LED
extinguishes. Now you can play music