MP-1 Phantom Power

[rnolan]

Hey Mate, it's unlikely to be the foot switch, but it may be .  But if you have 9v from the adapter tip, then we need to look further, as it will be either the tip isn't making proper contact (most likely), or the foot switch regulator.   Now in 30 years of owning and using a MXC, it's never been and issue.  But MJMP has advised that they do "sometimes" fail.  But it's never been reported on here by anyone, so I was a little surprised when he told us that titbit.

[Chase42147]

Hey Mate, it's unlikely to be the foot switch, but it may be .  But if you have 9v from the adapter tip, then we need to look further, as it will be either the tip isn't making proper contact (most likely), or the foot switch regulator.   Now in 30 years of owning and using a MXC, it's never been and issue.  But MJMP has advised that they do "sometimes" fail.  But it's never been reported on here by anyone, so I was a little surprised when he told us that titbit.

Finally got around to checking it this weekend! It is putting out 9V, I wasn't totally sure about how to get a current reading but it doesn't seem to be putting out 2 amps (although I may have been using the wrong setting on the multimeter, it's got a lot of settings I don't know how to use) I guess the next step will be using contact cleaner on the jack, and then trying aluminum foil to see if it makes a better connection

[rnolan]

Or get the correct tip, sounds like that is the problem, is 5.5mm x 2.5mm ??  And I think 500mA is what you need, not 2 amps, that's closer to power amp territory, but you need 500mA minimum, more is fine.

I just measured one of my AC adapter tips, Outer = 5.43mm or 7/32", Inner 2.42mm or 3/32".
This probably equates to a 5.5mm x 2.5mm which is the common size.

Easiest approach (IMHO) is buy one of these (below) as they come with 7 tips and one of those will be 5.5 x 2.5 and work    If you go for the slim DC adapter (which I have in my live rigs), just make sure you go inner (tip) +ve when you insert the tip in cable socket.

DC - (9V DC Jaycar)
AC - (9V AC Jaycar)

[Harley Hexxe]

Hey Chase42147,

   If your multimeter has DCA settings, then you want to check that way, you are looking for 500mA DC. 2 Amps is 4 times the amount of current than the pedal can handle, so you don't want that unless you like to cook electronics.

  If a little bit of foil gets power to your pedal, then you know the inner connector is too large. You just need a "N" type barrel plug on the end of your adapter. It wouldn't be a good idea to keep using it that way as the connection would be intermittent, and that will cause problems.

   If that doesn't get power to your pedal, then you have a problem in the pedal.

Keep us posted