Hello!
(Before I start, if this needs to be moved to Repairs... then please do so!)
RIght, I have a pedal board, nothing exciting compared with some of yours:
TU2 -> EBS Octabass -> EBS Unichorus -> Ibanez SB7 -> SansAmp BDDI -> PA (effected from BDDI)/Amp (clean)
They are all powered from a 9V DC mains adaptor using the [url="http://www.effectpowersupplies.com/gigrig-distributor-122-p.asp"]GigRig[/url] Distributor system, no batteries in sight. Bass is a Satus of some form, also run passive.
On Saturday my bass volume started fading in and out slowly (so slowly I didn't really notice til I thought "Wow I'm very quiet"). First time I noticed it my UniChorus was on so I thought it might be that. Second time there was no effect on at all (excpet the BDDI which was sending my rig a clean signal and the PA an EQ'd signal). Quick natter to the soundman, nothing else was having any issues but my volume issue was there both for my backline and front of house, so we took the pedals out of the chain and went striaght ito the BDDI, now off and running passive. Boom, volume back where it should be both backline and FoH.
Anyone ever come across anything like this before? I wonder if the power supply was getting hot and dropping its voltage but I also can't see that being the reason if I had the issue with all pedals off...?
I'm hoping to have some time to play with my pedalboard this week but with 2 kids on half term it might be difficult....
One last thing, last time i had an issue with my pedal board power supply, I was playing a gig in exactly the same room of the same hotel 3 years ago. And before that, about a year previously, was the first time I had pedal board power issues, also in the same room. Weird. (Each of those occasions necessitated a new power supply, I hope not again!!)