ORIGINAL: Bad_Daddy
As a rule-of-thumb, I like to say each servo would / could draw 500 mA, on average, so with 6 servos you need to be able to supply at least 3 Amps of power. Larger Digital servos can draw nearly 1 Amp each, but I think you're talking about the little Spektrum SP60 or SP75 servos, right?
Iv seen numbers as high as 5+ amps per servo (5955's)
Steven