Hi,
I just recently purchased a Drz Z28.
It's got 2 6V6's from groove tubes and they're rated a 5 each.
I also purchased a bias rite so I could do my own biasing.
I checked the amp (which sounds great) before turning any pots and here is the result:
Tube A
Plate dissipation: 386v
Current draw: 40.8ma.
Tube B:
Plate dissipation: 386v.
Current draw: 38.5ma.
Dr. Z's web site says that the numbers should be
375v and 22ma to 28ma.
I was a little alarmed at the high current numbers so I adjusted it and got this:
Tube A
Plate dissipation: 394v
Current draw: 26.8ma.
Tube B:
Plate dissipation: 395v.
Current draw: 25.4ma.
It seems to be a balancing act between the numbers; PD goes up...draw goes down....is that right?
I have a 5AR4 rect tube in there also..
Have I missed something? Is there a way to adjust plate dissipation without changing current draw?
I'm sorry I'm such a dunce for asking such simple questions....
I'm not going to turn the amp back on until I get a reply for fear of roasting something...
bob
I just recently purchased a Drz Z28.
It's got 2 6V6's from groove tubes and they're rated a 5 each.
I also purchased a bias rite so I could do my own biasing.
I checked the amp (which sounds great) before turning any pots and here is the result:
Tube A
Plate dissipation: 386v
Current draw: 40.8ma.
Tube B:
Plate dissipation: 386v.
Current draw: 38.5ma.
Dr. Z's web site says that the numbers should be
375v and 22ma to 28ma.
I was a little alarmed at the high current numbers so I adjusted it and got this:
Tube A
Plate dissipation: 394v
Current draw: 26.8ma.
Tube B:
Plate dissipation: 395v.
Current draw: 25.4ma.
It seems to be a balancing act between the numbers; PD goes up...draw goes down....is that right?
I have a 5AR4 rect tube in there also..
Have I missed something? Is there a way to adjust plate dissipation without changing current draw?
I'm sorry I'm such a dunce for asking such simple questions....
I'm not going to turn the amp back on until I get a reply for fear of roasting something...
bob