For those of you with a Twin Jet...

Emg77

Active member
Lasse Lammert":2yu8hoqy said:
The twin jet has kt88...28ma is way too cold

Per the User Manuel see below..... And Im digging the tone Im getting..... What would you suggest to bias it to? :rock:

"Common or ground plug insert is White color and the four individual tube plug inserts are Blue color. Set your
Multimeter to mV setting, 1mV = 1mA reading. Connect your Multimeters ground test lead to the White/Common
insert and the Multimeters positive test lead to one Blue/Tube insert. Adjust Bias to 25 mA, +/- 2 or 3 mA. Matched
tubes may have +/- 5% tolerances"
 

leib10

Active member
Wow... even then that's only 40% dissipation. You'd need to run it at 50mA in order to get 60% dissipation, which is average.
 

glassjaw7

Active member
leib10":legfn83c said:
Wow... even then that's only 40% dissipation. You'd need to run it at 50mA in order to get 60% dissipation, which is average.

Yep, they're probably just recommending 35 so people aren't complaining all over the interwebs of blowing tubes. I'd probably go a bit hotter.
 
Top