My Omega modded Hot Rod Deluxe has developed a hum while idling. Also when I turn on a pedal like the Lovepedal 200#'s of tone the buz is over the top. I'm running NOS tubes in the preamp V1 - 5751, V2 - 12ax7 & V3 - 5751. Power tubes are SED 6L6's, or RCA black plates depending on my mood. I took the PI out and it's dead quiet so I'm thinking the preamp is buggy - question now is - where to start looking? I'll email Jim and see what he thinks in the mean time - great sounding amp when I'm playing it he really nailed the BF clean tone.