In article ,
Ian Molton wrote:
The currents required are quite small. Hence you might find a suitable
box of batteries will be cheaper and simpler than a mains-based
design. Should make it easier to avoid noise and hum problems.

Indeed. When it says '15-48V' does it really mean anything in that
range? if so, the pair of 12V cells someone suggested is probably the
way to go.

Unless you intend long periods of use 4 PP3s should give about 50 hours at
least, although it's very much dependant on the mic. Some older AKG types
like the early 451s are happy on 9 volts - others may need 40+.

--
*Remember not to forget that which you do not need to know.*

Dave Plowman London SW 12
RIP Acorn