Yahoo Groups archive

Analogue-sequencer

Index last updated: 2026-04-28 23:15 UTC

Thread

p3 power supply

p3 power supply

2004-05-20 by droolmaster0

Well, I'm sure this is a ridiculously basic question, but I'm quite 
ignorant about stuff like this..

I have a ready made p3 arriving soon, and I need to pick up a U.S. 
power supply for it, described by Colin as 9v DC @ 500mA, on a 2.5mm 
barrel connector.

Is this a common enough item that I should be able to pick one up at 
a Radio Shack, or will I have to do a little more digging?

Thanks,
Gene

Re: p3 power supply

2004-05-20 by droolmaster0

--- In analogue-sequencer@yahoogroups.com, blip <bleep@w...> wrote:
> On Thu, 20 May 2004, droolmaster0 wrote:
> 
> > Well, I'm sure this is a ridiculously basic question, but I'm 
quite
> > ignorant about stuff like this..
> >
> > I have a ready made p3 arriving soon, and I need to pick up a U.S.
> > power supply for it, described by Colin as 9v DC @ 500mA, on a 
2.5mm
> > barrel connector.
> >
> > Is this a common enough item that I should be able to pick one up 
at
> > a Radio Shack, or will I have to do a little more digging?
> 
> hey, aren't you on the ion list too? man i can't wait to get my ion 
hooked
> up to the P3! anyway, here's a mouser part # for the PSU i'm 
using... it's
> nice and tiny!
> 
> 418-TR1509-12 (except they seem to be out of stock at teh moment)
> 
> 418-TR1512-12 (should work too, just higher voltage: 13.5V)
> 
> the P3 should easily be able to regulate that down to 9V.
> 
> (back to waiting for information on my case...)
> 
> bleep.
> out.

Explain 'mouser'. LOL! Somehow I think I should know what that is. 

Again - forgive my rudimentary knowledge of electronics - it is ok to 
get a higher voltage than specified? 

Yeah - I'm on the Ion list. I think it's a very nice synth, indeed. 
I've been buying lots of stuff of late (my studio got decimated by 
long unemployment), and haven't been able to learn it as deeply as 
I'd like - but I have had no problems with it at all, and it sounds 
great. And yeah - can't wait to unleash the P3 on it.

Re: p3 power supply

2004-05-20 by droolmaster0

I'm not sure what you mean by polarity in this context. (don't laugh, 
at least not at loud)

--- In analogue-sequencer@yahoogroups.com, Dave Magnuson 
<resfreq@h...> wrote:
> This is a very common power supply... there should be no problem 
getting
> one at the Shack.  Just make sure you get the correct polarity.  
> 
> Dave
> 
> 
> 
> At 06:51 PM 5/20/04 -0000, you wrote:
> >
> >Well, I'm sure this is a ridiculously basic question, but I'm 
quite 
> >ignorant about stuff like this..
> >
> >I have a ready made p3 arriving soon, and I need to pick up a U.S. 
> >power supply for it, described by Colin as 9v DC @ 500mA, on a 
2.5mm 
> >barrel connector.
> >
> >Is this a common enough item that I should be able to pick one up 
at 
Show quoted textHide quoted text
> >a Radio Shack, or will I have to do a little more digging?
> >
> >Thanks,
> >Gene
> >
> 
> Resonant Frequency:
> resfreq@h...
> http://www.hoohahrecords.com/resfreq/index.html
> 
> 
> [Non-text portions of this message have been removed]

Re: p3 power supply

2004-05-20 by droolmaster0

--- In analogue-sequencer@yahoogroups.com, blip <bleep@w...> wrote:
> 
> > Explain 'mouser'. LOL! Somehow I think I should know what that is.
> >
> > Again - forgive my rudimentary knowledge of electronics - it is 
ok to
> > get a higher voltage than specified?
> 
> ahhh... i should've read "ready made" in your previous post... 
mouser is
> probably teh largest electronics distrubutor in the US. i assumed 
you'd
> know who they were because you'd be buying an assload of stuff from
> them. :)
> 
> so my advice changes as a result... just go to radioshack and get 
the big
> ugly white one (9V/800mA). as a sidenote, the p3 is okay up to i 
think 15V
> (right colin?). it's got some fancy circuitry in it to regulate the
> voltage to 9V, which is what all the goodies in the box need to 
work.

So, I can exceed the 500 mA also? (I really don't have a clue what is 
permitted as a rule, and what isn't)

> 
> > I'd like - but I have had no problems with it at all, and it 
sounds
> > great. And yeah - can't wait to unleash the P3 on it.
> 
> can i have your life? :) my ions main outs are going dead, and the 
lfo
> rate knob has never worked... i don't mind that so much, but the
> outputs... that's a problem.
> 
> bleep.
> out.
> 

Seems like Alesis is pretty good about fixing/replacing units, 
though. Or have you been through all that?
Show quoted textHide quoted text
> ---
> http://leichenfeld.iuma.com
> http://thirdwavecollective.com

Re: p3 power supply

2004-05-20 by droolmaster0

--- In analogue-sequencer@yahoogroups.com, blip <bleep@w...> wrote:
> 
> > Explain 'mouser'. LOL! Somehow I think I should know what that is.
> >
> > Again - forgive my rudimentary knowledge of electronics - it is 
ok to
> > get a higher voltage than specified?
> 
> ahhh... i should've read "ready made" in your previous post... 
mouser is
> probably teh largest electronics distrubutor in the US. i assumed 
you'd
> know who they were because you'd be buying an assload of stuff from
> them. :)
> 
> so my advice changes as a result... just go to radioshack and get 
the big
> ugly white one (9V/800mA). as a sidenote, the p3 is okay up to i 
think 15V
> (right colin?). it's got some fancy circuitry in it to regulate the
> voltage to 9V, which is what all the goodies in the box need to 
work.

So, I can exceed the 500 mA also? (I really don't have a clue what is 
permitted as a rule, and what isn't)

> 
> > I'd like - but I have had no problems with it at all, and it 
sounds
> > great. And yeah - can't wait to unleash the P3 on it.
> 
> can i have your life? :) my ions main outs are going dead, and the 
lfo
> rate knob has never worked... i don't mind that so much, but the
> outputs... that's a problem.
> 
> bleep.
> out.
> 

Seems like Alesis is pretty good about fixing/replacing units, 
though. Or have you been through all that?
Show quoted textHide quoted text
> ---
> http://leichenfeld.iuma.com
> http://thirdwavecollective.com

Re: p3 power supply

2004-05-20 by droolmaster0

--- In analogue-sequencer@yahoogroups.com, blip <bleep@w...> wrote:
> 
> oh yeah... tell the folks at the store you need the adapter to 
be "tip
> positive." they'll make sure the PSU has the right end on it. it 
needs to
> be 2.5mm... i think it's ring color is... white. or black, one or 
the
> other. it's pretty fat looking (as opposed to phat, which is what 
an ion
> plus a p3 would be).
> 
> bleep.
> out.
> 
> ---
> http://leichenfeld.iuma.com
> http://thirdwavecollective.com

Ok - thanks for all the info. I'd hate to finally plug the thing in 
after all this anticipation and have it blow up.

Re: [analogue-sequencer] p3 power supply

2004-05-20 by Dave Magnuson

This is a very common power supply... there should be no problem getting
one at the Shack.  Just make sure you get the correct polarity.  

Dave



At 06:51 PM 5/20/04 -0000, you wrote:
>
>Well, I'm sure this is a ridiculously basic question, but I'm quite 
>ignorant about stuff like this..
>
>I have a ready made p3 arriving soon, and I need to pick up a U.S. 
>power supply for it, described by Colin as 9v DC @ 500mA, on a 2.5mm 
>barrel connector.
>
>Is this a common enough item that I should be able to pick one up at 
>a Radio Shack, or will I have to do a little more digging?
>
>Thanks,
>Gene
>

Resonant Frequency:
resfreq@hoohahrecords.com
http://www.hoohahrecords.com/resfreq/index.html


[Non-text portions of this message have been removed]

Re: p3 power supply

2004-05-20 by droolmaster0

--- In analogue-sequencer@yahoogroups.com, blip <bleep@w...> wrote:
> On Thu, 20 May 2004, droolmaster0 wrote:
> 
> > So, I can exceed the 500 mA also? (I really don't have a clue 
what is
> > permitted as a rule, and what isn't)
> 
> yup. the p3 will take what current it needs (typically 200mA). it's 
always
> good to have at least twice as much current available as you 
typically
> need, hence the recommendation of 500mA.
> 
> > Seems like Alesis is pretty good about fixing/replacing units,
> > though. Or have you been through all that?
> 
> no... partly because i bought it from a going out of biz dealer, so 
i
> don't know my warranty status, and partly because it's my only 
keyboard...
> all my other gear consists of boxes with knobs, mainly.
> 
> bleep.
> out.
> 

certainly empathize with the 'only keyboard' part of that. But Alesis 
seems to be trying to bend over backwards to be flexible as far as 
fixing units under warranty. You might try to argue them into making 
it a warranty repair. They told me that if my Ion (fails diagnostics, 
but does not exhibit the infamous self edit problem) EVER exhibits 
this problem they would fix it under warranty. This came from the 
manager of tech support. I think that they are sensitive to problems 
with early units...and mine isn't even an early one.
Show quoted textHide quoted text
> ---
> http://leichenfeld.iuma.com
> http://thirdwavecollective.com

Re: [analogue-sequencer] p3 power supply

2004-05-20 by blip

On Thu, 20 May 2004, droolmaster0 wrote:

> Well, I'm sure this is a ridiculously basic question, but I'm quite
> ignorant about stuff like this..
>
> I have a ready made p3 arriving soon, and I need to pick up a U.S.
> power supply for it, described by Colin as 9v DC @ 500mA, on a 2.5mm
> barrel connector.
>
> Is this a common enough item that I should be able to pick one up at
> a Radio Shack, or will I have to do a little more digging?

hey, aren't you on the ion list too? man i can't wait to get my ion hooked
up to the P3! anyway, here's a mouser part # for the PSU i'm using... it's
nice and tiny!

418-TR1509-12 (except they seem to be out of stock at teh moment)

418-TR1512-12 (should work too, just higher voltage: 13.5V)

the P3 should easily be able to regulate that down to 9V.

(back to waiting for information on my case...)

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

Re: [analogue-sequencer] p3 power supply

2004-05-20 by blip

On Thu, 20 May 2004, Dave Magnuson wrote:

> This is a very common power supply... there should be no problem getting
> one at the Shack.  Just make sure you get the correct polarity.

yeah, except it's HUGE. in my earlier woes, i blew one of these puppies
out... they weigh like 4lbs and cost $20, which is about $7 more than the
ones i just mentioned.

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

Re: [analogue-sequencer] Re: p3 power supply

2004-05-20 by blip

> Explain 'mouser'. LOL! Somehow I think I should know what that is.
>
> Again - forgive my rudimentary knowledge of electronics - it is ok to
> get a higher voltage than specified?

ahhh... i should've read "ready made" in your previous post... mouser is
probably teh largest electronics distrubutor in the US. i assumed you'd
know who they were because you'd be buying an assload of stuff from
them. :)

so my advice changes as a result... just go to radioshack and get the big
ugly white one (9V/800mA). as a sidenote, the p3 is okay up to i think 15V
(right colin?). it's got some fancy circuitry in it to regulate the
voltage to 9V, which is what all the goodies in the box need to work.

> I'd like - but I have had no problems with it at all, and it sounds
> great. And yeah - can't wait to unleash the P3 on it.

can i have your life? :) my ions main outs are going dead, and the lfo
rate knob has never worked... i don't mind that so much, but the
outputs... that's a problem.

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

Re: [analogue-sequencer] Re: p3 power supply

2004-05-20 by blip

oh yeah... tell the folks at the store you need the adapter to be "tip
positive." they'll make sure the PSU has the right end on it. it needs to
be 2.5mm... i think it's ring color is... white. or black, one or the
other. it's pretty fat looking (as opposed to phat, which is what an ion
plus a p3 would be).

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

P3 cases

2004-05-20 by Colin f

> (back to waiting for information on my case...)

Sorry for the lack of news on the cases...
Steve has them at the moment. I'm hoping he gets the time to machine the
rest of them soon, but please remember we have day jobs and lives.

Cheers,
Colin f

Re: [analogue-sequencer] Re: p3 power supply

2004-05-20 by blip

On Thu, 20 May 2004, droolmaster0 wrote:

> So, I can exceed the 500 mA also? (I really don't have a clue what is
> permitted as a rule, and what isn't)

yup. the p3 will take what current it needs (typically 200mA). it's always
good to have at least twice as much current available as you typically
need, hence the recommendation of 500mA.

> Seems like Alesis is pretty good about fixing/replacing units,
> though. Or have you been through all that?

no... partly because i bought it from a going out of biz dealer, so i
don't know my warranty status, and partly because it's my only keyboard...
all my other gear consists of boxes with knobs, mainly.

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

RE: [analogue-sequencer] Re: p3 power supply

2004-05-20 by Colin f

> Ok - thanks for all the info. I'd hate to finally plug the thing in 
> after all this anticipation and have it blow up.

Don't worry about that - you can't damage it with the wrong polarity as
there's a diode there to block it. It simply wouldn't power up.
P3 draws about 250mA, so I recommend a 500mA supply to allow for a
generous margin of error. The PSU cant force more power in there than it
wants. There's an electronic fuse in the supply too.
Voltage wise, P3 regulates the incoming voltage to 5v internally. It
needs the input voltage to be above 7.5v, but not too far above as the
regulator converts excess voltage to heat. It runs fine with a 15v
supply, but I recommend 9v since that's a widely available voltage used
for guitar effects.
If someone in the US can recommend a cheap, good quality supply that's
known to work and has the right connector, I'll make that the
'officially approved US supply'.

Cheers,
Colin f

Re: [analogue-sequencer] P3 cases

2004-05-20 by blip

On Thu, 20 May 2004, Colin f wrote:

> Steve has them at the moment. I'm hoping he gets the time to machine the
> rest of them soon, but please remember we have day jobs and lives.

what? day jobs? lives? preposterous... :)

i just want to make sure the US case comes through alright... i had a
discussion w/steve awhile ago regarding button measurements and such, but
haven't heard back since. i'll bug him next week sometime.

i should get off my ass and order/install that new diode anyway...

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

RE: [analogue-sequencer] Re: p3 power supply

2004-05-20 by blip

On Thu, 20 May 2004, Colin f wrote:

> If someone in the US can recommend a cheap, good quality supply that's
> known to work and has the right connector, I'll make that the
> 'officially approved US supply'.

the one i posted seems to work fine, from what i can tell... i'll get
everything put back together soon and update you. it's definitely the
right size plug, at least.

i'll add it to the US BOM when i'm sure it works too...

bleep.
out.

---
http://leichenfeld.iuma.com
http://thirdwavecollective.com

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.