Revv Owner’s Manual - 21
To prepare:
1)
Remove the rear baffle cover from the rear of the amplifier. If you are
replacing tubes, do so now with the power off & the amplifier unplugged
from the main power receptacle. Place the new tubes in the correct
socket positions.
2)
Next unlock the bias trimmers by turning the nut counter clockwise &
then turn the trimmers down by turning the trimmer shaft with a small
screwdriver in the counterclockwise direction. If any fuses had blown,
make sure to replace them as well.
3)
Now plug the amplifier into the main power receptacle, make sure the
amplifier is plugged into a load or speaker cabinet, unplug any guitar
cables from the inputs & turn on the main power. Let the tubes warm up
for one minute
4)
Turn the volume controls to zero & turn on standby to the Revv posi-
tion.
Set the bias:
1)
Place the black lead from your meter into the black bias test point on
the amplifier & the red lead into the red bias test point (The red test point
on the left is for V1 & V3 tubes, red test point on the right is for V2 & V4
tubes).
2)
Refer to the chart below for bias set points for the tubes being used &
slowly turn the trimmer in the clockwise direction until the value is
reached.
5.4
