Om jämförelse mellan Groove Tubes matchning nummer med flera.
( källa: www.mylesrose.com )
The numbers I have in the maxi-matcher table are the numbers I prefer myself.
In the case of cathode biased EL84 amps these are also the numbers I use and a cathode biased amp with high numbers will do little more than run hot, sound harsh and generate a lot more heat.
Maxi-Matcher to GT #6 (maxi-matcher settings)
6L6 20-25 400 / -48V
EL34 30-35 400 / -36v
6550 35-40 400 / -48v
KT88 38-40 400 / -48v
EL84 30-35 325 / -12V
6V6 28-32 400 / -36v
The above numbers are the plate current display numberrange that would correspond to a mid range (proper designspec) tube. In this case a #6 GT rating was used to establish these numbers and the GT rating was verifiedby using published tube design data (from the RCA tubedata sheets). As an example, a 6L6 spec tube would have been tested at 250 plate volts, 250 screen volts and -14.5vbias with a design target of 72mA plate current output asthe design expectation. This tube on the maxi-matcher wouldhave a plate current readout of 20-22mA and would be a proper spec tube.
Mesa Boogie color scale to GT rating:
Red Orange 4
Green Gray 5
Blue White 6
Fender color scale to GT rating:
Blue 1-3 GT
White 4-7 GT
Red 8-10 GT