[hpsdr] Case for experimental version of HPSDR

[Steve Ireland]

Hi John

The case is entirely made from aluminium sheet (from a hardware store) and a
few pieces of aluminium angle, some aluminium pop-rivets and a load of M3
screws (for which the sheets of aluminium/angle iron have been tapped). The
tray part (on which Atlas is mounted) is mounted about 5cm up from the
bottom.

Really the idea of talking about the case was to show that to encourage
those who possess the old-tyme radio skill of 'sheet aluminium bashing' (or
who like to read old copies of the ARRL or RSGB handbooks and fancied giving
this a go) that they can make a pretty respectable case for their
new-fangled SDR.

Vy 73

Steve, VK6VZ

   

-----Original Message-----
From: w9ddd at localhost.localdomain [mailto:w9ddd at localhost.localdomain] On
Behalf Of John Koster
Sent: Saturday, 4 October 2008 9:40 PM
To: Steve Ireland
Subject: RE: [hpsdr] Case for experimental version of HPSDR

OK, that gives a better idea.  The bottom then is the off the shelf radio 
chassis (or perhaps you fashioned your own?) with sides, top etc 
constructed out of standard sheet and angle.  I suspect one could purchase 
the parts at one of the better stocked hardware stores.  At least I 
remember seeing Al angle, not sure whether they had sheet in any 
reasonable size.  

On Sat, 4 Oct 2008, Steve Ireland wrote:

> Hi John
> 
> Well, I do happen to have this photograph, which you may find interesting.
> Spent the afternoon with a Dymotape Letrogram labeling the sockets on the
> back of it...
> 
> Vy 73
> 
> Steve, VK6VZ
> 
> -----Original Message-----
> From: w9ddd at localhost.localdomain [mailto:w9ddd at localhost.localdomain] On
> Behalf Of John Koster
> Sent: Saturday, 4 October 2008 8:37 PM
> To: Steve Ireland
> Cc: HPSDR Reflector
> Subject: Re: [hpsdr] Case for experimental version of HPSDR
> 
> Photographs?  Please, you can't tease us like that and give us nothing!  
> Scan the back of the envelope?  
> 
> 
> On Sat, 4 Oct 2008, Steve Ireland wrote:
> 
> > ***** High Performance Software Defined Radio Discussion List *****
> > 
> > 
> G'day
> 
>  
> 
> It has been interesting to read some of the comments about potential cases
> for the HPSDR.
> 
>  
> 
> One of the important things to consider is ultimately whether you wish to
> make a stand-alone HPSDR that contains not only Ozy, Mercury and Penelope
> boards mounted on the Atlas backplane but also items such as a 100W PA,
Alex
> filter boards, a 12V fan to cool everything and, potentially, maybe
> Gibraltar when it comes along.
> 
>  
> 
> I wanted to do all of the latter, with the intention of running the HPSDR
> from old-fashioned linear power supplies (one switch-mode power supply in
my
> Pentium IV pc is quite enough 'switch-modeing' for me - more is not worth
> the potential RFI problems).
> 
>  
> 
> As a result, I did a back-of-an envelope sketch of an old-fashioned
> box/radio chassis 18cm high by 29.5cm wide by 30.5cm deep, with a
tray-type
> chassis fixed to the front panel on which the Atlas backplane plus
Mercury,
> Ozy and Penelope could be mounted on top (along with a 50 to 100W PA board
> out of an old commercial HF radio) and the Alex Tx LPF/Rx HPF boards could
> be mounted underneath.  The various USB/DB9/DB25/BNC sockets protrude
> through the back panel, so the back of the unit is a kind patch
> panel/external connection panel.
> 
>  
> 
> My friend Bob VK6CG turned my dodgy back-of-an-envelope sketch into a
clever
> and practical design, which Phil VK6APH and myself plan to use in a series
> of articles next year on how to practically put together a HPSDR in the
> RSGB's RadCom magazine and that will hopefully find its way into a book
> about practical SDR in the next year or so.  The only problem is finding
> time to actually do this.
> 
>  
> 
> This design currently exists in prototype form and there are no drawings
> available (and, yes, no time to produce them either  ;-)  ).  However,
those
> old-timers who are used to building chassis for valve or old fashioned
> transistor designs will know what sort of chassis I am talking about - the
> kind of thing that can be turned out on a garage work bench with a decent
> vice, drill and pop-riveter.
> 
>  
> 
> Hopefully this gives some would-be HPSDR case builders food for thought.  
> 
>  
> 
> Vy 73
> 
>  
> 
> Steve, VK6VZ
> 
> 

-- 
73,
John, W9DDD

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