[ARC5] A Super-Easy 95 Volt B+ Supply for Your Projects.

[David Stinson]

As ya'll know, I've had good luck working with monolythic
DC/DC converters for powering projects.
Many of them aren't useful for us, having outputs like 5V etc.,
 but there is a current listing that will fit many projects.  
I bought a couple for testing.
They were quiet inexpensive- $8 each.

http://www.ebay.com/itm/160775207820

A spec sheet is at:

www.murata-ps.com/data/power/bwr15-20wa-series.pdf

While the converters are speced for 18 to 75 volts DC in 
to produce an isolated-from-the-input dual output of + and - 48 Volts, 
I've tested these down to 10 Volts in and they still worked fine. 
The two output supplies have a common "ground."  By leaving this "common"
open and connecting the + output as B+ and the - output to ground 
(12 volt input common),
I have a 95 VDC B+ supply from 12 or 24 Volts in.  
I tested it by powering-up a "hammed" BC-454 receiver.  
It worked well but does have some low-amplitude""birdies" 
on the output.  I did not do any RF filtering during the tests.
I have filtered other DC/DC converters like this with ferrites and 
that took care of the birdies.  Smarter people than me will have 
ideas on this.
I'm ordering some more.  Very useful.

73 DE Dave AB5S