3rd Power Kitchen Sink 6VEL User Manual page 20

Power Tube Biasing: Factory Settings
Factory Settings: E34L
Your amplifier ships with the bias settings optimized for maximum flexibility and safety. During QC
and final testing, the bias is set maximum safe power dissipation (approximately 60% of a given
tube's performance rating). For each type of power tube, you can safely switch between SS and Tube
Rectifier.
For amplifiers equipped with JJ E34L power tubes, the chart below shows factory bias setting as well
as the bias performance of each rectifier scenario (solid state, GZ34 tube or 5U4GB tube). You can
safely switch between SS Rectifier Mode and Tube Rectifier Mode. You may also swap out the GZ34
rectifier tube with the 5U4GB tube - all without having to adjust the bias.
Power Tube
JJ Electronics E34L SS Rectifier
JJ Electronics E34L GZ34 Tube
JJ Electronics E34L 5U4GB Tube
Factory Settings: 6V6GC
For amplifiers equipped with JJ 6V6GC power tubes, the chart below shows factory bias setting as
well as the bias performance of each rectifier scenario (solid state, GZ34 tube or 5U4GB tube). You
can safely switch between SS Rectifier Mode and Tube Rectifier Mode. You may also swap out the
GZ34 rectifier tube with the 5U4GB tube - all without having to adjust the bias.
Power Tube
JJ Electronics 6V6GC SS Rectifier
JJ Electronics 6V6GC GZ34 Tube
JJ Electronics 6V6GC 5U4GB Tube
Rectifier ~Plate
Voltage
428V
403V
382V
Rectifier ~Plate
Voltage
442V
423V
404V
~Bias Wattage @ Idle/
(milliamps)
Dissipation
38.0 31W (61%)
42.0 32W (64%)
29.3 21.2W (42%)
~Bias Wattage @ Idle/
(milliamps)
Dissipation
19.3 16W (57%)
23.9 18.4W (68%)
18.2 13.8W (49%)
20
Safety Range
Average (Factory)
Average (Factory)
Brown (Factory)
Safety Range
Average (Factory)
Med. Hot (Factory)
Brown/Cool (Factory)