I use the Dunlop DC Brick. The only pedals that have had issues with it has been EHX. Other then that, it's worked perfectly for me and produces no noise.
All of them. EHX pedals all have a very high current draw.
I am running 8 pedals with one 1 Spot. No noise. No issues.
I have been running 8 pedals with a 1-spot as well. I just added a EHX Deluxe Memory Boy and the noise (including pulse) is unbearable. It's extremely quiet when it's on its own power supply, but in the daisy-chain it's crazy. Would I be better off looking for a power supply with isolated outputs, or finding a different delay (with tap tempo and modulation) ?