Originally posted by fewtch Grounds, what grounds? The MMF-1 preamp has no grounding whatsoever. Plugs in via a 12vdc wall wart, and the case is made of plastic and has no grounding post. Would simply hooking the turntable's ground to the "-" terminal (electrical "ground") constitute grounding in that case? What kind of grounding can you expect anyway with this kind of setup?I see grounding posts on other preamps that also use a 2-prong type plug, what are they trying to do?
There's nothing to hook the turntable ground to... but I've used a Sony turntable quite awhile with a built-in preamp that also isn't grounded and never had a single issue, no hum, no RF, surprisingly clean output. You would be amazed, this is a $150 turntable that Sony discontinued several years ago (only trouble is proprietary cartridge, and *extremely* sensitive to vibrations, even light touch on the chassis sounds like a "thump").Here's the real question maybe -- having found an adequate (if massively unspectactular) setup in the Sony turntable, why am I putting myself through this sh*t? I'll take this as an advisory to leave well enough alone from now on.
Originally posted by fewtch I figured it out, appears the "ground" on the outside part (not inside connector) of the phono plug outputs seems to get rid of any hum from the turntable.Anyway, I uploaded those pics again, try reloading the page (they should display now).