Hi Roy.

17-Dec-03 12:06:36, Roy J. Tellason wrote to THURSTON ACKERMAN


 RJT> THURSTON ACKERMAN wrote in a message to ALL:

 TA>> There has been some looking for 24vdc power supplies

 RJT> Has there really?  What are they good for?

 TA>> so I cast a holler to other OTs that seemed to remember a
 TA>> possible source as seen in the following:

 TA>> ==================================================================
 TA>> = ========  BBS: Hafa Adai Exchange & BBSNetworks Date: 12-14-03
 TA>> (17:00)             Number: 2015 From: BOB KLAHN
 TA>>   Refer#: NONE To: THURSTON ACKERMAN             Recvd: NO Subj:
 TA>> NCO's, Education, and Mil      Conf: (307) Fido-Debat
 TA>> ------------------------------------------------------------------
 TA>> ---------FS>>-=> Quoting Bob Klahn to Frank Scheidt <=-

 FS>> During WWII I took correspondence courses from the U.S. Armed
 FS>> Forces Institute, commonly called "USAFI" located in Madison,
 FS>> Wisconsin.  They offered a wide variety of subjects -- *not*
 FS>> including "Armorer, Aircraft" ... heh heh heh ...

 TA>> Please pardon my intrusion here Frank but over on the Fido Tech
 TA>> Echo there is some discussion regarding 24v dc power supplies for
 TA>> PCs.

 RJT> I was of the impression that what we were looking at was ways to
 RJT> run a pc off a 12v battery,  but no matter

 TA>> Many moons ago I worked on military aircraft radio communications
 TA>> systems and my aged, defragged memory suggests many aircraft
 TA>> electric supplies were 24vdc.

 RJT> I remember seeing some military surplus stuff way back when,  but
 RJT> I thought it wanted something like 28v

That'd probably be take from "24v" vehicles. :-)  the "2
volt" lead-acid
cell strikes again.

 RJT> Worse yet,  it wanted 400 cycles!

ok could be aircraft then they use frequencies like that to reduce the
mass of the transformers needed... I think they do on ships too.
AIUI ground vehicles are all DC.

I don't think Carol Shenkenberger reads here but she's the one to ask about
military electronics. (I think she's IT tech on a navy ship)

 RJT> It's got a big ferroresonant transformer in there,  an extra
 RJT> winding or two, apparently some provision for battery backup
 RJT> which isn't implemented,  and I can't recall what else

 RJT> You guys have any ideas as to what this might be good for?

With a bit of regulation it'd make a nice bench powersupply

 -=> Bye <=-

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