Deane,
I have the older Zoom H2, which I just plug into my PSR-3000's headphone jack. It does a fantastic job and is only the size of a pack of cigarettes.
Cheers,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)