Multiface power supply

Archived from groups: rec.audio.pro (More info?)

My Multiface power supply died during a very time-critical job. My local
electronics store only had a supply delivering 0.7 amps (rather than 1.25 on
the original) - I bought this and it seems to work. Am I likely to have
problems
with the lower current of this supply?

Another store that I did not have time to get to had one delivering 1.5
amps. Would this be preferable or is it too high?

Sorry can't post to the RME news server for some reason!

Archived from groups: rec.audio.pro (More info?)

Karl Engel <karlengel_AT_excite_DOT_com> wrote:
>My Multiface power supply died during a very time-critical job. My local
>electronics store only had a supply delivering 0.7 amps (rather than 1.25 on
>the original) - I bought this and it seems to work. Am I likely to have
>problems
>with the lower current of this supply?

Depends on how much current the Multiface wants. If it wants more than 0.7
amps, the supply will probably overheat and eventually fail.

>Another store that I did not have time to get to had one delivering 1.5
>amps. Would this be preferable or is it too high?

No, you could use a supply rated for a thousand amps and you'd be fine.
And it would probably run very cool.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Archived from groups: rec.audio.pro (More info?)

mrivers@d-and-d.com (Mike Rivers) wrote in message news:<znr1112700012k@trad>...
> In article <425252c0@dnews.tpgi.com.au> "Karl Engel" <karlengel_AT_excite_DOT_com> writes:
>
> > My Multiface power supply died during a very time-critical job. My local
> > electronics store only had a supply delivering 0.7 amps (rather than 1.25 on
> > the original) - I bought this and it seems to work. Am I likely to have
> > problems with the lower current of this supply?
>
> If it works, it will probably continue to work. But probably better to
> get the correct replacement on order.
>
> > Another store that I did not have time to get to had one delivering 1.5
> > amps. Would this be preferable or is it too high?
>
> You can't have too many amps, in this context. You would have been
> safer with that. However, there's a lot more to plug-in power supplies
> than what meets the eye. With the limited knowledge that you show from
> your posting (and you might know more than you show) you were lucky.
> First of all, some are AC, some are DC, and they're not
> interchangeable. There are two possible ways to wire the connector as
> to which terminal is positive, and both are used. Then there are
> ripple and grounding considerations.

Hi Mike, I'm always happy to admit the limits of my knowledge! In
this case I knew the supply needed to supply DC 12V with the tip
positive - mainly coz it said so on the old one!

RME support got back to me to say the Multiface really needs 800mA so
what I have is a little shy of that. I didn't know you could have
lots more current without causing a problem, thanks for confirming
that.

What's throwing me is that the old power supply doesn't work when I
first plug it in, but leave it on for awhile and it comes good (the
little light on it comes on full strength). So it's not failing as
such, but needs a push to get going! A sign of imminent failure
perhaps, or does this indicate something else?