Gthirteen's Rogue Tempest is HUMMING

Greetings AudiogoNers!!
It's been a while.

I am thoroughly enjoying a recently purchased Rogue Tempest integrated amp, despite UPS's best efforts to break it...
"Big Ups" to Mark at Rogue for his superior patience and kindness...

Problem is, the outlet in my stereo area is only a 2 pronger, so I have to use a cheater plug, additionally I'm using a BMI Eel. Only source is Rega Planet CD. SHort RCAs. After a couple of weeks, a loud hum began eminating from the chassis of the Tempest. It IS worse when the ceiling fan is turned on, and occasionally, when flicking the fan on and off, you can hear clicking coming through the speakers. What's wierd is that the amp was whisper quiet at first.
I initially bought a $6 Leviton outlet at Home Depot (3 prong) , but never put it in, because I doubted that there was a ground wire in the wall, however there are 2 grounded outlets in my apt, not sure if separate ground wires were run to them. What should I do, guys (and gal)?

Thanks as always, and hello to all my pals.