On Sun, 19 Jun 2005 22:11:18 -0700, GrumpyOldGeek
<grumpyoldgeek@gmail.com> wrote:

>I need to run some microprocessor equipment
>from -48 volt central office battery and I'm
>looking for a packaged and tested converter
>for a reasonable price.

Depending on what you mean by reasonable - try Traco Power. They make
quite an extensive and good quality range of DC-DC converters. 
http://www.tracopower.com
I used to recommend Datel as well, but the last batch of DC-DCs we got
from them did not meet their specs at all. (They started to die at 40
C, while they are supposed to be rated full power up to 85 C)

Regards
  Anton 

GrumpyOldGeek wrote:
> I need to run some microprocessor equipment
> from -48 volt central office battery and I'm
> looking for a packaged and tested converter
> for a reasonable price.

"Reasonable" price is subjective, but here's a source for starters:
http://www.astrodyne.com/astro/dept_dcdc.asp?dept%5Fid=6

Looks like they're in the $38-$50 range.

Cheers,
Richard

I need to run some microprocessor equipment
from -48 volt central office battery and I'm
looking for a packaged and tested converter
for a reasonable price.