Yes, but...:-) See some tube data for 6V6 and EL84 (similarly). With "standing current" of about 30-40 mA per tube, and Ua of 250-300V we can expect about 4-5 W in PP triode A class, or about double in UL. Pentode and AB class ~15W or little more. With max. power, our 60-80 mA "standing current" would rise very close to the 100mA, and better use "economical" driver tube that work with only a few mA...