I'm building a 120VDC power supply for my frankensteined Model 15 / 19.  The plan is to take 3 transformers with 28V secondaries in series, gets me 84VAC, then a rectifier and maybe smoothing capacitor.  I'm not sure about the VA rating for the transformers.  I calculated 7.2VA for the current loop (60mA * 120V DC), but I'm not sure about the perforator.  Anyone have numbers for that?  Also, am I missing something?