Hey, my groove tubes came in today, it's a 92 model, right before they added the effects loop on it. I set it up similar to how i set up my H&K bluesmaster and hooked it up to a Zoom H4n to see what kind of tones I would get as if it was straight to the board. I turned it on, and all i was getting is a very loud annoying buzzing and humming, and nothing coming from my guitar... I looked at the back and noticed the "ground lift" switch, which way should this be facing, it could have gotten switched during shipping in the box. One thing i did notice, is when i when to touch the actual chasis of it, i though i felt electricity, not painful, but just a little bit to make my skin tingle... I took it apart and saw that it was serviced by a guy in florida in 2002, and that it has upgraded caps 2 really big silver "Mallory", I think they are upgraded atleast.. the inside looks like nothing i saw on the internet before.
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