[hpsdr] punched metal backplate for Pandora

Sun Jul 5 10:39:55 PDT 2009

Sorry, I blew that one.   It's supposed to be 0.800" 

You may find that fractions are used in carpentry, but 
sheetmetal/mechanical work is in decimals.  (I don't have a good ruler 
with anything but fractions on it either, unless I use the metric side).  

On Sun, 5 Jul 2009, w3sz wrote:

> Hi John,
> 
> Thanks for the note!  I very much appreciate it!
> 
> The only question I have about the numbers you gave is that the holes 
> the blanks are screwed to measure to me to be about 13/16 [0.8125]inches 
> apart, rather than 1 inch apart.  This 13/16 dimension also makes sense 
> as it is just a bit larger than the 0.790 width of a blank, which is 
> what I'd expect.  But it could just be that I don't really understand 
> the meaning of "1.000 centers", as I have even less experience with 
> mechanical/drafting lingo than I do electronic lingo ;)
> 
> Thanks very much for all of your work and help, and have a great week!
> 
> 73,
> 
> W3SZ
> Roger Rehr
> http://www.nitehawk.com/w3sz
> 
> On 7/5/2009 12:05 PM, John Koster wrote:
> > In the mean time here's some information extracted from those drawings.
> >
> > 0.790 wide
> > 5.107 long
> >
> > The 0.125 wide notch is centered on each end and is 0.198 deep.  Radius
> > of end of notch is 0.0625
> >
> > Radius of the corners isn't specified on this drawing sheet, but appears
> > to be also about 0.0625.
> >
> > Holes the blanks are screwed to are on 1.000 centers (which matched the
> > spacing between the Atlas connectors).
> >
> > They sure don't do mechanical drawings the way I was taught 50+ years ago!
> >
> >
> > On Sun, 5 Jul 2009, John Ackermann N8UR wrote:
> >
> >> ***** High Performance Software Defined Radio Discussion List *****
> >>
> >> Roger, that's a very good question.  There are PDFs showing the
> >> mechanicals, but they were prepared by the manufacturer.  I am sure
> >> there will be no problem making them available (I should have thought of
> >> it before...) but should check with them before posting the files.  I'll
> >> do that this week.
> >>
> >> John
> >> ----
> >>
> >> w3sz said the following on 07/05/2009 11:33 AM:
> >>> ***** High Performance Software Defined Radio Discussion List *****
> >>>
> >>> Does anyone know if CAD files or text files with the exact dimensions
> >>> used for Pandora [e.g. spacing/size of screw and other holes on the back
> >>> panel] exist on the openhpsdr website or elsewhere on the web?
> >>>
> >>> I have the boxes and can measure, but to keep errors as low as possible
> >>> I'd like to start with the design dimensions first.
> >>>
> >>> I couldn't find them at either
> >>>
> >>> http://openhpsdr.org/wiki/index.php?title=PANDORA
> >>>
> >>> or
> >>>
> >>> http://openhpsdr.org/pandora.html
> >>>
> >>> or
> >>>
> >>> http://openhpsdr.org/documents.html
> >>>
> >>> or
> >>>
> >>> http://openhpsdr.org/download.html
> >>>
> >>> or
> >>>
> >>> http://www.tapr.org/kits_pandora.html
> >>>
> >>> 73,
> >>>
> >>> W3SZ
> >>> Roger Rehr
> >>> http://www.nitehawk.com/w3sz
> >>>
> >>> On 7/1/2009 8:05 PM, Roger Rehr wrote:
> >>>> Hi All,
> >>>>
> >>>> Unfortunately my ham shack is in the country on the edge of the forest,
> >>>> and its impossible to keep mice out of it. I have had equipment damage
> >>>> by mice in past years at this location, so that everything I use is
> >>>> 'mouse proofed' or locked away after use. See
> >>>> http://www.nitehawk.com/w3sz/mouse-ft1000.htm if interested in proof.
> >>>>
> >>>> I very much like the Pandora enclosure and my Atlas/Mercury/OzyPenelope
> >>>> HPSDRs.
> >>>>
> >>>> But Pandora is not mouse proof, and I really do not want mice doing
> >>>> their mischief in my HPSDR enclosures.
> >>>>
> >>>> So I ask, would it be possible to design and have built a punched metal
> >>>> backplate to attach to the back of Pandora shaped to seal Pandora
> >>>> effectively with the above-mentioned boards in place?
> >>>>
> >>>> If it were possible to do so, I would like to proceed with moving this
> >>>> little project forward, as I am tiring of disconnecting and putting away
> >>>> my HPSDRs after each use and then getting them out again and
> >>>> reconnecting them for the next use. And I worry about the eventual
> >>>> effect of such repeated connects and disconnects on the stereo 3.5 mm
> >>>> connectors on Penelope and Mercury.
> >>>>
> >>>> So I would ask, of you experts on this list:
> >>>>
> >>>> 1. If this can be possibly done
> >>>> 2. What would be the preferred slot positions for Mercury/Ozy/Penelope?
> >>>> [so that the backplate can be designed to accommodate this arrangement]
> >>>> 3. What business concern might give a price for producing such
> >>>> backplates and then do a good job of producing them?
> >>>> 4. Who else on the list might be interested in having such backplates
> >>>> [if anyone] if I were to have them produced?
> >>>> 5. Is there anyone that would like to tackle the layout / dimensions of
> >>>> such a backplate? I could do it but as I have no experience in doing
> >>>> either the careful measuring or the CAD layout this would require, I
> >>>> suspect I'd screw it up.
> >>>>
> >>>> The mice can get in thru some very tiny holes, so I might also need to
> >>>> plug up the openings intended for Alex for those Pandoras that won't
> >>>> include Alex.
> >>>>
> >>>> Thanks in advance,
> >>>>
> >>>> Roger Rehr
> >>>> W3SZ
> >>>> http://www.nitehawk.com/w3sz/osxhpsdrserver.htm
> >>>>
> >>>>
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> >
> 

-- 
73,
John, W9DDD

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