Yahoo Groups archive
Thread
2005-08-25 by Chris //
2005-08-25 by synth1@airmail.net
> I am thinking big and would like to order a 1.5 amp power one linear > supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit > bigger)... > > Can I just take out the supply from the MOTM-900 and replace it with one > of the above, will that work??? Does the fuse need to be changed in the > plug???? > Just the fuse. The fuse rating you need is printed on the side of the power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman or Littelfuse. Paul S.
2005-08-25 by Greg Amann
> I am thinking big and would like to order a 1.5 amp power one linear
> supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit
> bigger)...
>
> Can I just take out the supply from the MOTM-900 and replace it with one
> of the above, will that work??? Does the fuse need to be changed in the
> plug????
>
Just the fuse. The fuse rating you need is printed on the side of the
power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman
or Littelfuse.
Paul S.
2005-08-25 by J. Larry Hendry
> I am thinking big and would like to order a 1.5 amp power one linear
> supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit
> bigger)...
>
> Can I just take out the supply from the MOTM-900 and replace it with one
> of the above, will that work??? Does the fuse need to be changed in the
> plug????
>
Just the fuse. The fuse rating you need is printed on the side of the
power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman
or Littelfuse.
Paul S.
2005-08-26 by Richard Brewster
Depending on your cabinet, you may be able to mount the larger supply near to the MOTM-900 panel. You may be able to reuse the original AC wiring from the panel to the new supply. And you can move the 12-connector distribution board from the MOTM0-900 panel and locate it in a more convenient spot. I use dot com cabinets and mount the MOTM power supply panels on the back with the supply chassis fastened down to the wood just in front of the panel. I mount it length-wise to make more clearance for modules in front of it. -Richard Brewster Greg Amann wrote:
> The 800 mA Power One supply that comes in the MOTM-900 is a different > size (namely, smaller) than the HBB15-1.5A. Check oot either the > Power One site or DigiKey: both list the dimensions of the supplies. > The larger supplies will not be "screw compatible" with the 3U '900 > mounting panel. > > PLL, BFG > > > synth1@... wrote: > >> > I am thinking big and would like to order a 1.5 amp power one linear >> > supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit >> > bigger)... >> > >> > Can I just take out the supply from the MOTM-900 and replace it >> with one >> > of the above, will that work??? Does the fuse need to be changed in the >> > plug???? >> > >> >> Just the fuse. The fuse rating you need is printed on the side of the >> power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from >> Bussman >> or Littelfuse. >> >> Paul S. >> >>
2005-08-26 by Oakley Sound
Personally I would always go for two smaller power supplies than one big one. I know size may be an issue, but there are advantages to a distributed system of smaller supplies. Firstly, if your power supply dies, there is less chance of every module being affected. This is unlikely with a Power One, but things do go wrong. Secondly, a higher rated supply, say 3A, will be quite happy to drive 3A into your whole system or just one module. So if you have one faulty module it will quite happily chuck 3A into it and possibly burn something out. Thirdly, you can more likely ensure that the +15V and -15V lines stay at that level if the power busses are shorter. Which they would be with a smaller system of multiple busses each driven from their own supply, compared to one large distributed buss driven from one supply. Also any noisy modules that you may have can get their own supply leaving the audio pathway to have a nice clean supply for itself. Fourthly, Power One supplies do latch up with less than their maximum rated load. This is a flaw with their design whereby one supply line powers up before the first so the other one switches off. I have a sneaky feeling that using two smaller supplies will actually get you more module count than one bigger one. In a nutshell it is probably better to use two MOTM supplies not one bigger one. Tony
2005-08-26 by Chris //
----- Original Message -----From: synth1@...To: Chris //Sent: Thursday, August 25, 2005 2:41 PMSubject: Re: [motm] Swapping Power Supplies> I am thinking big and would like to order a 1.5 amp power one linear
> supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit
> bigger)...
>
> Can I just take out the supply from the MOTM-900 and replace it with one
> of the above, will that work??? Does the fuse need to be changed in the
> plug????
>
Just the fuse. The fuse rating you need is printed on the side of the
power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman
or Littelfuse.
Paul S.
2005-08-26 by Chris //
----- Original Message -----From: Chris //Sent: Friday, August 26, 2005 8:04 AMSubject: Re: [motm] Swapping Power SuppliesHelloThanks everyone for the supplies, I will put a little thought into this and how it will work best with my setup and than decide which route to go....Also for buying extra MOTM-900 PCB's, is it as easy as wiring additional boards to the power supply like the initial board.thanks----- Original Message -----From: synth1@...To: Chris //Sent: Thursday, August 25, 2005 2:41 PMSubject: Re: [motm] Swapping Power Supplies> I am thinking big and would like to order a 1.5 amp power one linear
> supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit
> bigger)...
>
> Can I just take out the supply from the MOTM-900 and replace it with one
> of the above, will that work??? Does the fuse need to be changed in the
> plug????
>
Just the fuse. The fuse rating you need is printed on the side of the
power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman
or Littelfuse.
Paul S.
2005-08-26 by Paul Schreiber
----- Original Message -----From: Chris //Sent: Friday, August 26, 2005 8:13 AMSubject: Re: [motm] Swapping Power Suppliesone more question, if i was to buy a bigger power supply and mount it in my wood cabinet and mount my momt-900 to the side of a wood cabinet, will i have ground issues because it is not attached to a metal frame...sorry i know nothing about this and dont understand anything about it either.----- Original Message -----From: Chris //Sent: Friday, August 26, 2005 8:04 AMSubject: Re: [motm] Swapping Power SuppliesHelloThanks everyone for the supplies, I will put a little thought into this and how it will work best with my setup and than decide which route to go....Also for buying extra MOTM-900 PCB's, is it as easy as wiring additional boards to the power supply like the initial board.thanks----- Original Message -----From: synth1@...To: Chris //Sent: Thursday, August 25, 2005 2:41 PMSubject: Re: [motm] Swapping Power Supplies> I am thinking big and would like to order a 1.5 amp power one linear
> supply HBB15-1.5-A or a 3 amp HCC15-3-A (i know this one is a bit
> bigger)...
>
> Can I just take out the supply from the MOTM-900 and replace it with one
> of the above, will that work??? Does the fuse need to be changed in the
> plug????
>
Just the fuse. The fuse rating you need is printed on the side of the
power supply. I use standard 5mm X 20mm fuses, "Slo-Blo" type from Bussman
or Littelfuse.
Paul S.
2005-08-26 by Robert van der Kamp
On Friday 26 August 2005 15:16, Paul Schreiber wrote: > No, but for best results mount them next to each other > (not on opposite ends of the cabinet). You will need 1 > large gauge (say #10) ground wire to connect the output > grounds together. Okay, but what to do when you have two cabinets, each with their own '9xx PSU to feed the modules in the cabinet? Do they need the above treatment too? - Robert (hoping to build cabinet #2 soon)
2005-08-26 by Paul Schreiber
No. No different from plugging a synth into a mixer into a power amp. The cables carry the ground. Paul S. ----- Original Message -----
From: "Robert van der Kamp" <robnet@...> To: "MOTM List" <motm@yahoogroups.com> Sent: Friday, August 26, 2005 8:33 AM Subject: Re: [motm] Swapping Power Supplies > On Friday 26 August 2005 15:16, Paul Schreiber wrote: >> No, but for best results mount them next to each other >> (not on opposite ends of the cabinet). You will need 1 >> large gauge (say #10) ground wire to connect the output >> grounds together. > > Okay, but what to do when you have two cabinets, each with > their own '9xx PSU to feed the modules in the cabinet? Do > they need the above treatment too? > > - Robert (hoping to build cabinet #2 soon) > > > > > Yahoo! Groups Links > > > > > >
2005-08-26 by Adam Schabtach
> Fourthly, Power One supplies do latch up with less than their maximum > rated load. This is a flaw with their design whereby one supply line > powers up before the first so the other one switches off. I've seen this happen in my system. I started with a pretty hefty Power-One supply and paid careful attention to the total calculated current draw as I added modules. Eventually the supply would not turn on reliably, even though the total current draw was far less than its rated limit. It may or may not have been coincidental that one of the last modules I added was a Blacet Time Machine, a module that has an asymmetric current draw (i.e., it draws more from the +15V supply than the -15V side). The system would run once it powered up, but it didn't always power up on the first attempt which was disconcerting. I added a second, smaller Power One supply, redistributed the modules across the two, and now both supplies power up without trouble. --Adam (received his third supply yesterday) www.studionebula.com