Re: [Xylo-SDR] Some design thoughts requested

[KD5NWA <kd5nwa@cox.net>]

The beautiful thing about EuroCards is they are available from 1/4 size
to full size, double and triple width also, so there is a lot of freedom
when you want to get a prototype board. And they are
inexpensive.

At 08:57 AM 1/4/2006, you wrote:
> Yep, DIN41612 seems like a good
> choice.   I agree the DDR DIMM sockets
> impose too many restrictions for the type of use we intend to put
> them
> to for the Xylo stuff (physical insert/remove cycles and 1.27mm
> board
> thickness limitations).
>
> 73 de Phil N8VB
>
> On 1/4/06, Leon Heller <leon.heller@bulldoghome.com> wrote:
> >
> >
> > ----- Original Message -----
> > From: Eric Ellison
> > To: 'Xylo-SDR Discussion'
> > Sent: Wednesday, January 04, 2006 12:04 PM
> > Subject: Re: [Xylo-SDR] Some design thoughts requested
> >
> >
> >
> >
> > John ­ Phil
> >
> >
> >
> > Thanks, back to the drawing board! Seemed like a good idea, but with
> these
> > limitations, I doubt that we would want to do it this way.
> >
> >
> >
> > Looks like we are back to indirect connectors, like DIN41612. They
> use
> > standard thickness PCB material, are designed for multiple
> insertions, and
> > are even replacable (with the right equipment). They have been used
> for many
> > years on VME systems, which are still very popular in military
> equipment.
> > The single Eurocard is a nice format (160 mm x 100 mm) with 32, 64
> or 96
> > pins, and may be scaled down to half-length, or less, for smaller
> systems.
> >
> >
> >
> > Leon
> > _______________________________________________
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>
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> >
> >
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Cecil Bayona
KD5NWA
www.qrpradio.com

I fail to see why doing the same thing over and over and getting the same results every time is insanity: I've almost proved it isn't; only a few more tests now and I'm sure results will differ this time ...