Phantom Microphone Power-er!

[rockgardenlove]

Using this schem:
http://members.nuvox.net/~zt.robgrow/circuits/powersupply/phantompower.html
I've checked it against some other sites on phantom supplies and it looks correct.

Here's my transformer choice:
Hammond 164E24
http://www.hammondmfg.com/162.htm
.1A at 24v
Sounds about right, no?  I'm guessing that each mic of mine will draw around 2.5mA, so that should suffice easily for the 5 or so I'm planning.

Here's something I don't get:
http://www.st.com/stonline/books/pdf/docs/2154.pdf
It says it'll provide up to 37v output voltage.  I *should* have 48v, even though it won't really make a difference.  Just wondering why on the schem it would say it produces 48v?

And for more than one mic I'd do fine just to duplicate the lower half of that schematic a few times, no?

Thanks!