Oh yeah...there was one more thing...
That the connector fits correctly to the plug. I just bought a Tascam GT-1 (GREAT item....it is a portable CD player, with guitar connector (could use with keyboard too) that allows one to loop and even slow down or change pitch on a song and play along. Great for practice and for learning fast leads, etc.
Anyway, it came with a generic DC adapter, one of those you can configure (it's really smart to have a couple of these around at all times...extra) for the voltage, pinout, and plug type. I set the volts on the wall wart to 9v., and took what I thought was the correct plug, but later on I found out that even though it "fit"...and it supplied the power and worked, it was one size too big so it wasn't making good solid contact. No harm was done, and I changed it out for the next size smaller jack and it worked fine.
Just a small, obvious point.
Jim
====================================================
Check out my original music at
http://www.soundclick.com/bands/1/jackermusic.htm"In theory there is no difference between theory and practice,
but not in practice."
====================================================
----- Original Message -----
From: "James Acker" <jacker@...>
To: <AN1x-list@yahoogroups.com>
Sent: Saturday, August 02, 2003 3:38 AM
Subject: Re: [AN1x] Power Supply
> As far as I know, the only important things with a power supply that supplies DC voltage to a piece of equipment is:
>
> FOR DC VOLTAGE SUPPLIES
> =============================
> 1) That the voltage is correct, rated as "v" as in "9v" equals 9 volts DC.
>
> 2) That the "pinout" is correct (i.e. that the "-" is on the inside and the "+" is on the outside of the connector or vice versa.
>
> 3) That the power supply is rated to supply the amperage (in some units rated in micro amps...the symbol for "micro" looks like a "u" with the stem going down a little more.
>
> Points 1-3 are almost always found in the specs for the devices, and usually at the plug on the unit.
>
> 4) That the supply is "clean". Which means how much variance or "ripple" there is in the voltage. This shouldn't be an issue with any decent power supply...ripple is just how much (since it is converting from AC line in to DC voltage the nature of the conversion can make the output DC voltage "flutter" a little from some value above...looks like waves on an oscilliscope) it varies over time from the rated voltage.
> Unless you have an oscilliscope there is no way to check this, and I am not sure it is even that big a deal. Usually the input on the unit will have what they call a "zener diode" on the input DC voltage that keeps it at least at the nominal value. I only mention this, but really it isn't an issue.
>
> All the above points are general. Many manufacturers warn about not using any except THEIR own power supplies which cost a bit more because they authorize them for use. The unit doesn't care one whit as long as it gets the proper supply voltage, with the proper polarization, and that can handle the load (ampere rating). On the other hand, a cheapie may go overvolt (theoretically) or breakdown....
>
>
> There are other "wall warts" for some units that take AC power but they are less complex and polarity probably is not an issue with them.
>
> hope this helps.
>
> Jim
>
> ====================================================
> Check out my original music at
> http://www.soundclick.com/bands/1/jackermusic.htm
>
> "In theory there is no difference between theory and practice,
> but not in practice."
> ====================================================
>
> ----- Original Message -----
> From: "Peter Korsten" <peterk@...>
> To: <AN1x-list@yahoogroups.com>
> Sent: Friday, August 01, 2003 9:22 PM
> Subject: Re: [AN1x] Power Supply
>
>
> > retrosynths wrote:
> > > Hi, I've recently moved from Australia to California and would like
> > > to buy another AN1x synth (I left my one at home) However I do not
> > > know much about the differences with power supplies between the USA
> > > and Australia (we use 220 volt wiring)
> > >
> > > Would an AN1x bought here work there if I changed the power supply
> > > box?
> > >
> > > And if I brought my synth over here would I just buy a local power
> > > supply box? Perhaps a Yamaha product?
> > >
> > > I guess I want to know if the AN1x would accept the differnt power
> > > supply?
> >
> > One of the few advantages of an external power supply is that you can
> > easily exchange it. So if you want to play it safe, get an official
> > Yamaha US/Canadian power supply for your AN1x, and otherwise esteemed
> > member and all round guru Bruce may have a word of advice.
> >
> > - Peter
> >
> >
> >
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