DC-3 bias results

[talltxguy]

Here's a bit of data that may help some DC-3 owners. I used my variac to adjust the incoming voltage. Then I measured the idle current, and the plate voltage. The last number is the "bias percentage."

JJ EL84 (Tube Depot rated 16)
121 incoming volts
39.8 mA
410V
136%

114 incoming volts
36.2 mA
387V
117%

108 incoming volts
32.7 mA
363V
99%

Mesa EL84 (green color code)
121 incoming volts
45.1 mA
410V
154%

114 incoming volts
41.0 mA
387V
132%

108 incoming volts
33.1 mA
363V
100%