[NSRCA-discussion] Power Supplies

[Keith Hoard]

Unless he’s wearing mirrored sunglasses and one of those reflective belts that goes around his waist and over his shoulder, I’d have a hard time respecting his “Authori-tay” . . .

From: Ronald Van Putte 
Sent: Wednesday, July 03, 2013 9:14 AM
To: General pattern discussion 
Subject: Re: [NSRCA-discussion] Power Supplies

John Fuqua can tell you.  He's the AMA "hall monitor" at the RV site at Site 3 and he's there now.   

Yeah, he's been flying in Soaring. 

Ron

On Jul 3, 2013, at 9:07 AM, Keith Hoard wrote:


  Speaking of power supplies.. .

  Does anyone know what plug I need to get to obtain 120VAC from the RV power receptacles at Site 4?



  From: Bob Kane 
  Sent: Wednesday, July 03, 2013 6:48 AM
  To: General pattern discussion 
  Subject: Re: [NSRCA-discussion] Power Supplies

  I have picked up two of these from Amazon:


  "Dc 24v 15a Switching Power Supply Transformer Regulated", they are around $25.  Working well so far. No modifications needed, but you do need to wire a power cord and charger leads.



  I use the Turnigy 10XC charger and usually charge at 4 amps.  The charger draws 7 amps from the supply when charging a 10S pack so in theory I could run two chargers off this supply. 


  I have also powered this setup from a cheapie 800 watt two-stroke generator a couple of times, no issues yet.

   
  Bob Kane
  getterflash at yahoo.com


------------------------------------------------------------------------------
  From: Ronald Van Putte <vanputter at gmail.com>
  To: General pattern discussion <nsrca-discussion at lists.nsrca.org> 
  Sent: Monday, July 1, 2013 11:50 PM
  Subject: [NSRCA-discussion] Power Supplies


  A lot of electric-power pilots are building or buying charge boxes.  Many of the charge boxes contain the HP DL380 G4 DPS-600PB 12V/575W power supply.  


  Since they are so inexpensive to acquire and so simple to convert for our use, I'd like to provide some information about them.


  These are so called "hot swap" power supplies.  They are really tough and were designed to be used in a computer server 24/7.  Their output is 47 amperes at about 12.5 volts.  You can use two in series to provide 47 amperes at about 25 volts.


  You can buy them at places like eBay for about $15 delivered if you shop around, particularly if you look for lots of two or three.  These power supplies cost upwards of $300 when they were in active use, but the servers they were designed to work with have been retired, leaving a lot of these server power supplies as surplus.  Consequently, you can get them pretty cheap. 


  I usually show pilots with any measure of soldering skills how to convert them for our use.  The conversion takes about 30 minutes.  The rest, who can't solder or can't follow simple directions, I do the conversion for them.


  There is a great description how to do the conversion of the HP model DPS-600PB power supply here:  https://sites.google.com/site/tjinguytech/my-projects/HP47A


  Any questions?  E-Mail me offline.


  See you at the Nats.


  Ron Van Putte

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