[hpsdr] Compact Power Supply for begginers

[Erik Anderson]

I have an (untested) LPU, but it's asking for a "regulated power supply".
I'm looking at amateur radio power sources and some of them are flagged as
"switching".  How careful do I need to be in staying away from those,
considering (*) the LPU probably filters out at least some of the noise, and
(*) these power supplies were designed for amateur radio use and are likely
heavily filtered to begin with.

Erik KE7YOA

On Sat, Feb 26, 2011 at 1:05 PM, David McQuate <mcquate at sonic.net> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
>
>  Hi Maximo,
>   Some (many?) switching power supplies radiate RF energy on many harmonics
> of the switching frequency, possibly causing interference that you'll hear
> as you listen to your radio.  Some switchers seem to be well shielded and
> filtered and don't produce noticable RF.  I guess all you can do is try one
> and see how bad it is.
>
>   I have Metis, Mercury, Penelope and Excalibur, and my +5v supply current
> is 1.79 amp.
> With only Metis and Mercury, it is 1.56 amp.
>
> Of these cards Penelope is the only one needing +12v, and that's only for
> the 0.5 watt power amp IC.
> I'm currently using a very old linear power supply (+5v only).  I plan to
> build a linear supply that would handle all these cards, plus a
> Penny-Whistle 15W RF amp.
>
> Dave
> wa8ywq
>
> On 2/26/2011 11:34 AM, Maximo EA1DDO_HK1DX wrote:
>
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
>
> Hi,
>
> As a HPSDR begginer with just the Atlas, Mercury EU and the still comming
> Metis, I need now the power supply.
> I guess that 5VDC is all I need to run with the basic stuff I said before.
>
> A full ATX power supply from a computer is good but may be too large for
> now, so I am thinking in a compact 5VDC switching power supply. But I would
> like to get some directions from more experienced HPSDR users.
>
> I found a few options and I would like to share with you, to get your
> opinion;
>
> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=130417466390
>
> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280584969393
>
> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=290509371602
>
> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=390103502122
>
> What you think?
>
> Thank you
>
> 73, Maximo - EA1DDO/G
>
>
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