3rd Power Kitchen Sink 6VEL Kullanıcı Kılavuzu - Sayfa 13

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Back Panel (Section Six):

OHM SELECTOR

FAN

16Ω

4Ω

8Ω

CAUTION:

NEVER touch hot tubes!!! Temperatures can exceed 500˚F and cause severe burns!

CAUTION:

Read all of the information and procedures in this section before attempting to modify the factory

bias settings of your ampliﬁer.

Power Tube Bias Adjustment Control (29)

Controls the amount of negative DC bias voltage being fed into both output tube input grids. Insert

a mini ﬂathead screw driver into control port and rotate counter-clockwise to lower the idle current

setting (operate cooler). Rotate clockwise to increase the idle current setting (operate hotter).

V5+ Voltage Reading Terminal (30)

This terminal is internally connected to a one-ohm resistor on the output tube cathode of V5 (the

power tube on the right). When monitoring the current here, you will be reading millivolts on your

portable multimeter. You will need to connect your positive (+) test lead (typically red) to this termi-

nal.

GND- Terminal (31)

This terminal is internally connected to chassis ground. When monitoring the current of either out-

put tube, you will need to connect the negative (typically black) test lead here.

V6+ Voltage Reading Terminal (32)

This terminal is internally connected to a one-ohm resistor on the output tube cathode of V6 (the

power tube on the right). When monitoring the current here, you will be reading millivolts on your

portable multimeter. You will need to connect your positive (+) test lead (typically red) to this termi-

nal.