Again, instead of using the target wattage as part of the equation, the wattage ends up being the goal, correct? In other words, you take the [OT volts;

*variable depending on bias*] divided by [OT resistance, in my case 45 ohms] times [plate voltage;

*also variable depending on bias*] EQUALS the target wattage of 70% of 25 watts plate dissapation of EH 6CA7s which is 17.5 watts.

Again, the equation from VH junkie:

OT_VOLTs/OT_RESISTANCE * plateV = target wattage (17.5w @ 70%)

Again, calculating the plate dissapation wattage. If it's less than 17.5, you're cold. If it's more, you're hot. Is this right?

The resistance on my OT with power off is 45 ohms, each side, not 17 like you had suggested. Is this because my OT is 2.5k instead of 1.75? This is where I got confused and remeasured a bunch of times. But after using this formula, I got close to the 17.5 watt target, so I assumed I was right.

Funny thing, the bias keeps falling each time I play the amp for 15 minutes or so (fallen 3 times now). Right now, I have the bias pot cranked all the way and my my plate dissapation wattage ends up around 15 watts, under the 17.5 goal, so, tubes are biased cold, right?