[hpsdr] Demeter

[John Westmoreland]

Phil,

I don't doubt that we can come up with a good/great design for a switched
mode power supply.  Obviously we want to pick 'good' frequencies and watch
harmonics and sub-harmonics - maybe some good parts from Linear Tech would
be a good choice.

Is there a schematic already started along these lines?

Do we have a target max. current for the +5V bus?

73's,
John
AJ6BC
On Nov 6, 2011 3:11 AM, "Phil Harman" <phil at pharman.org> wrote:

> **
> Hi John,
>
> Thanks for the offer of assistance - much appreciated. We are about to
> release a significant update for all the FPGA code. This will involve an
> increase in current consumption on the +5V rail should the user select more
> than one receiver.
>
> The final current readings are presently being taken and will form the
> basis of the specification of a  new power supply for the Alex bus. Given
> the success of using a SMPSU for Hermes it is highly likely that the new
> supply will use this technology.
>
> We will review this project in the very near future.
>
> 73 Phil....VK6APH
>
>
> ----- Original Message -----
> *From:* John Westmoreland <john at westmorelandengineering.com>
> *To:* hpsdr at openhpsdr.org
> *Sent:* Saturday, November 05, 2011 10:07 PM
> *Subject:* [hpsdr] Demeter
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>  ------------------------------
>
> To All,
>
> Based on yesterday"s discussion, sounds like Demeter isn"t being persued;
> or at least isn"t a priority.
>
> Does it make sense to get Demeter on the front burner again so to speak or
> is it seen as a non-issue?
>
> I can definitely help with any design related issues.
>
> 73's,
> John
> AJ6BC
>
> ------------------------------
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help:
> http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
>
> ------------------------------
>
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.1869 / Virus Database: 2092/4598 - Release Date: 11/05/11
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20111106/7b91b6f5/attachment-0004.htm>