From: Mark Gaffney <markgaffney@me.com>

Date: December 24, 2009 7:13:41 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: Firewire connections...

Thanks Milton, 

Once again have a terrific Christmas..!

Mark.

On 25/12/2009, at 9:59 AM, milton_aupperle wrote:

The Specs I have for the Scorpion SCOR-20SO indicates it requires up to 3.5 watts of power. The Flea uses around 2.5 amps, so the combined will be about 6 watts. I don't know what the Hub needs for watts of power, but it might be 1.

So if your Adapter puts out 12 volts, then you need at least:

7 Amps / 12 volts = 0.58 amps or 583 milli amps.

of power. So the 0.8 watt / 800 milliwat 12 volt one should work.

HTH..

Milton Aupperle

--- In Astro_IIDC@yahoogroups.com, Mark Gaffney <markgaffney@...> wrote:
>
> Hi Milton,
> I`ve found a number of adaptors now none seem to be the recommended
> 1.5A! http://www.unibrain.com/Products/p1394/FR400.htm
> The adaptor I already tried with the (native to here) plug
> says ...Output +6V=2A.. another says 12V+0.8A, a big one I have on
> which I`ve removed the 12V plug says 12V=2000mA 24VA & one with an
> American plug says 9V=17A (16W Max). I also have the variable voltage
> American one I bought for the Peltier cooler (which is quite
> permanently attached now- with the 12V plug removed) which says Output
> 12VDC current DC 2500mA. I guess I could try the second one I
> mentioned @ 12V+0.8A...
>
> Mark.
> On 25/12/2009, at 3:58 AM, Milton Aupperle wrote:
>
> > Hi Mark;
> >
> > Yes, that's what I am trying to get across.
> >
> > You need to use a 4 pin to 6 pin FW adapter between the Hub and the
> > Mac, which forces the Hub to power itself. You also need an AC/DC
> > adapter too for the Hub to power it. Usually they indicate near the
> > plug what the Adapter will need for input, like 12 volt and xx amps.
> >
> > HTH..
> >
> > Milton Aupperle
> >
> > On 23-Dec-09, at 9:17 PM, Mark Gaffney wrote:
> >
> > >
> > >
> > > Milton, That"s another good idea but the solution I have now with
> > > the 12 volt power adaptor dosen"t involve any more expendtures of
> > > money at this stage & appears to be working. Do you mean that the 6
> > > pin cables are drawing power from the computer"s FW bus & this may
> > > be detracting from the Firerepeater 400"s operation?
> > >
> > > Mark.
> >
> >
> >
>