[hpsdr] Power Supply

[Phil Harman]

Power SupplyHi Gordon,

The prototype Penelope board draws about  300mA from the 5v rail and 200mA from the 1v rail at full output.  Mercury pulls about 500mA from the 5v rail and 200mA from the 12v rail.  These figures are approximate but should be close enough for you to chose a PSU. Neither of these boards use the -12v rail.

73's Phil...VK6APH 


  ----- Original Message ----- 
  From: Gordon & Lois Duff 
  To: hpsdr at hpsdr.org 
  Sent: Wednesday, June 06, 2007 8:13 PM
  Subject: [hpsdr] Power Supply


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  I guess I need to clarify my question.  

  Pico makes four supplies that seem to be candidates, maybe.  According to their manuals, the -12v ratings are: 
  PicoPSU-120            50ma 
  PicoPSU-120-WI-32 100ma 
  PicoPSU-120-WI-25 100ma 
  PicoPSU-80              50ma 

  At the TAPR booth in Dayton I saw what looked like a Pico supply driving Janus and Ozy, so it appears that one of the supplies is appropriate for TWO boards.  My question is while the Pico supplies be adequate as Mercury and others are added (excluding a PA).  I notice that Mercury does not need -12v, but does it fit within the ratings for the other voltages?

  Gordon. 

  ______________________________________________ 
  From:   Gordon & Lois Duff [HYPERLINK HYPERLINK mailto:glduff at bellsouth.net mailto:glduff at bellsouth.net HYPERLINK mailto:glduff at bellsouth.net mailto:glduff at bellsouth.net] 

  Sent:   Tuesday, June 05, 2007 5:36 PM 
  To:     Subject:        Power Supply 

  I have seen the Pico PSU power supply plugged into the Atlas board with Janus and Ozy.  This supply seems to be running close to its limits for theses two boards for the -12v requirement - I saw someplace that Janus & Ozy need about 70ma at -12v and the Pico is rated at 100ma.  If other boards are going to require -12v as well, then the Pico is not a good choice.  Can anyone help me out here?

  Gordon, KA2NLM 




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