[hpsdr] Pandora Update: another potential enclosure.

[Eric Ellison]

Chris/Ben

About 5 critical milestones in HPSDR design were reached on this forum, by
about this time last year, which along with a 20 ohm 10 watt resistor, gives
everyone thousands of  options for enclosures at costs ranging from the cost
of the resistor to perhaps $500. If you use a PicoPSU then no resistor
required! Possibilities dating from the release of the IBM PC in 1982? to
present. Obtainable from your neighbor's trash to the thousand offerings on
a proverbial "PCenclosures.com". Another option would be to build an
enclosure yourself out of wood, Plexiglas, Steel, or aluminum angle pieces
and sheet stock. etc.

Pandora when it becomes a reality, would help ANY of these choices, except
for perhaps the PERFECT> 6 SLOT or =< 2 SLOT (Atlas-Lite) PC enclosure.

Perhaps, on the eve of Janus/Ozy and the near horizon of Mercury / Penelope,
we should re-publish the links to AT power supply modifications to work with
Atlas.

Find the SMALLEST practical PC enclosure for Janus/Ozy and/or Ozy/Merc/Pen.
Find the best Rack mount PC enclosure.
Publish the enclosure you are actually going to use for the projects.

Brainstorm the PC enclosure characteristics which would be desireable. For
example EXACTLY six slots. Side opposite Atlas mount removable for Pinocchio
work. Etc.

Thanks
Eric
 






 







 

Hi Chris!

Chris Albertson wrote:
> I read on the Wiki "...the backplane can be fitted into a standard PC
> enclosure."  Is this true?

Absolutely!  Any reasonably-sized PC case (IE: AT/ATX, not ITX) with six 
or more card slots will hold an Atlas populated with six of the largest 
100 by 220mm cards.

> If so why not source a good quality PC case.  There are many
> that are small and well built.  If one needs controls build those
> into a box that has the size of a CD-ROM drive.  

This is a very good option for some users of the HPSDR.  I believe one 
reason the Atlas design chose an 0.800" center to center card spacing is 
to accommodate the use of a PC case as an HPSDR case.  In addition, it 
already has a power supply!  Shielding may be a concern - I've seen some 
lousy shielding even in good quality PC cases.

There is a gentleman here who even has a webpage with a drawing of the 
HPSDR fitted into a very fancy PC case.  It's very, very nice!  I dare 
say it's art museum worthy - like a very fine piece of high-end stereo 
gear.  I can't seem to locate his message with the link, so hopefully 
he'll respond and share the link to his page.

For other users with limited space or those desiring portable operation, 
a PC case is simply too large and bulky.  An AT/ATX case with six slots 
is fairly large with much empty space inside.  Or, better said, I've not 
been able to find a rather small PC case that has six slots in the rear 
that doesn't waste a lot of space.  Many, including me, just don't have 
room in the shack for another computer sized box.

Pandora is meant to be both a solution for this smaller case need, as 
well as provide a buffet of parts for those who, say for instance, want 
a rack-mount HPSDR.  To me, one of the wonderful things of the HPSDR 
concept is that each of us can choose the case we want, the cards we 
want, and I'm probably jumping the gun in saying this, but also the 
software we want.

HPSDR - have it your way!  My apologies to Burger King.  (I wish we had 
a good Burger King here, but alas, they are all awful.)

thanks much,
ben, kd5byb
-- 
Thanks and 73,
Ben, KD5BYB

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