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6. VALVES
6.1. Remove the grill
To remove the grill:
1. For your safety, please turn off the amplifier.
2. Using a screwdriver (Hex M3 supplied with the manual) unscrew the screws on
the upper part of the grill, then remove the shapes that make up the grill one by
one, unscrewing the spacers that act as support with your hand.
3. Continue to the base until only the holes remain.
6.2. Adjusting the BIAS
To get maximum performance from your tube amplifier it is imperative that the BIAS
is properly tuned.
This model is equipped with acalibration
fixed BIASsystem
, which can be adjusted
from the outside by means of a “SET” potentiometer.
It is advisable to operate below 80mA to preserve the valves for longer and in no
case exceed the maximum value of 90mA.
6.3. Valves Efficiency
■
The tubes supplied with the amplifier can last from 5 years for the Power tubes
and 10 years or more for the pre and driver tubes.
■
Please be aware that some tubes need a long period of time (up to 250 hours) to
reach their optimum sound quality.
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