Are you experienced? Need a little help here!

[Lobsang]

Hi everybody,
I m studying in order to build a power supply, that is, an AC/DC adapter specifically for stompbox use. Before you cry I will say that I am already considering most of what runs on the net, including R G Keens stuff among others. I also know that the wall wart has trouble getting a clean, noise-free tone specially with fuzzes, and so on. What I dont know is what my drummer just suggested me. He told me to use a 9 to 12 volt secondary but with a higher amperage. The logic is like this: if each box runs off with 500 mA, using higher currents will let me drive several boxes all in parallel with the adapter, with a single rectifier section. That said, a 2Ampere secondary allows four boxes, 3A allows six, etc.
He said this is a most common approach when hooking pedals and he saw it working. It has a theoretical base in the Thevenin rule that says you can spread the current but the voltage remains the same in a parallel connection. I am afraid of frying my fuzz clones when I hook them to 3A ( havent tried it yet). Other questions spring to mind like, what if I have six outputs but use three pedals? Would they get double feed? All in all, WOULD THIS WORK????¿¿¿¿??? Id like to hear some feedback here. What you think? Just let me know. Thanx!

[JRobinson]

Your effects should only draw the current they need even if more is available, so you can use a higher current. A higher voltage might fry it, but again, the pedal should only pull what it needs. Picture putting 6D cells in series, to get 9 volts. These batteries will be capable of supplying alot more current than a regular 9 volt battery, but your effect would be fine, as it will only draw the 5 to 20 ma it needs to work.  
 SO you could do what you want, but then you'd have the potential for ground loops, so If you can afford it, build a supply like RG's with individual transformers, or be more adventurous and modify one transformer with as many legs as you need, also per RG.

[Rick]

It is fine and often desirable to use a higher amperage xformer. Too high a voltage presented to your circuit can certainly fry it. Use a voltage regulator chip (9volt output etc.) and a xformer with a secondary output of at least 12v.  18v is good also as the regulator chip requires a few volts more to produce  the desired output voltage. A 2 or 3 amp or higher (but will be bulkier) xformer will be fine to supply several pedals. As stated the pedal will only consume the current (ma) it needs even if you had a 100 amp xformer. It's the voltage pressure you must be careful with.