[sdiy] 24V PSU Question

[harrybissell]

Hi John

You prlly need two supplies.   If you have 24V you might make a voltage doubler
to
get the 48V... it would be a switching power supply so be careful of noise
problems.

There was some PAiA project that ran a voltage booster made of a 4049
inverter... that
has a max of about 18V though. The technique could be applied . iirc it was used
in the
"stack in a box" project.

Its important to note whether you need an isolated power supply (with the
grounds
separate). If you do, separate supplies would be the easiest way to go...

H^) harry

prototek wrote:

>     Hey guys and girls. I have a quick question about power supplies. The
> supply is meant for a mic preamp project I'm doing so I hope everyone will
> forgive the "un-synthiness" of this post.
>     The preamp functions off of 24V but also needs 48V for phantom power.
> Since I have no "hands on" experience with psu's this puzzles me. Is there a
> way to tap both voltages off of one supply, or do I need two seperate
> supplies (24V and 48V respectively)? Any methods for doing this would be
> greatly appreciated.
>
>                 Thanks,
>                 John