Repeater levels/ noise

["Mike B (digiboy)" <digiboy@nyc.rr.com>]

The Handsonic ( basically a Roland drum machine with  pads  designed like a
hand drum) is a very quiet noise-free instrument yet when I connect to the
repeater and overdub, I am getting a lot of noise. I have fooled with all
the levels, have the handsonic cranked (still dead quiet) and back off on
the levels to  just optimum settings on the repeater, I still get a lot of
noise build-up with overdubs. It's not just hiss either, I get a sort of
whiney hum almost like a tape machine in need of demagnetizing.

Actually, listening thru a headset with nothing plugged in and the track
levels all the way down  and the input level all the way down, I hear that
same noise/hum if I crank the headset.

Are these Repeaters inherently noisey?
Did I get a bad unit?

Any input, advice much appreciated.

Thanks,
Mike B


Mike Berman
digiboy@nyc.rr.com