Not another phono preamp thread, aggh! 2002-06-26 09:17:21 I've noticed many outboard preamps are subject to RFI, even if it's below the level of audibility... when recorded as a wave & normalized, I can hear a radio station in the background.Anyway, it seems to me most of the RFI is coming from the turntable cables, which are acting like antennas (I've *never* heard RFI in a preamp built into a turntable). Anyone know of a basic RFI filter that can be connected between audio equipment and blocks out anything in the RF range? Or how something simple could be made with a couple capacitors?The Music Hall MMF-1 I have (yah I know it's a turntable, apparently Music Hall briefly made an outboard preamp too) is actually not bad at all, sounds very good and after taking a peek inside, the components look to be of high quality -- but it does pick up some RF. The noise floor isn't that great either, instead of a light "fluttering" when normalized, what I hear is pink noise, like the sound of a waterfall -- but it's still below the level of normal audibility.Thanks.