I love my '74 RI Phase 90 (CSP-026). It has that classic phaser sound and gets it without a lot of fiddly knobs. It looks cool, and it's (basically) what the cool kids with more money than me had when I was in high school in the late '70s. On the other hand, it simply does not play well with its neighbors on my pedalboard. I put in a 3PDT for true bypass right after I got it. That gets it out of the way when I'm not using it, but the change in impedance switching it in and out can cause some interesting problems. I realized long ago that it really needs a buffer after it, so now I make sure that no matter what, I have a Boss pedal immediately downstream. That helps minimize the tone suck problems. Now this morning, I realized I was hearing a "thump" through my amp, in time to the Phase 90's clock. Thump, thump, thump, thump, thump... as long as it's switched on. The thump goes away when I switch it off. My boards not that complicated: Pitchblack -> Rat -> BB Preamp -> Phase 90 -> CE-2 -> BF-3 -> DD-3 -> MS-50G -> Amp. Each pedal is powered by an isolated output from my PP2+. I swear, it's one thing after another with this pedal. If I could get my MS-50G to do a decent imitation of the Phase 90 (see post #319), I'd toss the orange box off the island.