[hpsdr] Some thoughts on plug-in board layout

[Philip Covington]

Hi Steve,

Comments in line below:

On 5/25/06, Steven Bible <srbible at earthlink.net> wrote:

> Attached is a mechanical drawing I did to hopefully understand the dimensions of an individual card.  I placed 100mm, 120mm, 160mm, and 185mm dimensions.

I don't think the 100x100mm card will be wide enough for ATX case
mounting.  I had proposed these sizes in addition to Alex's 100x185mm:

100x120mm
100x160mm
100x220mm

> Will someone tell me what the base measurement system will be (metric or inches)?  I think it should be metric, however, the DIN 41612 has base dimensions appear in inches.

I'd like an answer to the question also.  Unfortunately its a mix when
you start looking at VMX or Eurocard formats - even the ATX spec mixes
units it seems.  The board spacing is 0.800", even though the board
sizes are given in mm.

> Phil, in your ATLUS PLUG-INS drawing, you show 12.6 mm from the bottom of the PCB to the end of the DIN 41612 plug.  I think this is actually 7.37 mm.  The 12.6 mm is the top of the DIN plug plastic to bottom, not how it is mounted to the PCB.

I would guess that my dimension is wrong.  I was working quickly
because I has a million things to get done today! :-)

> The DIN plug that I used what the one Lyle called out for JANUS (AMP P/N 650473-5).
>
> I don't really understand the "external connector area".  Is this PCB material?  Or is this just an placeholder?  What is the interface plane?

Its just to indicate where the external connectors should be placed.
There is no set dimensions for this on the drawing yet.  Think of the
boards as like PCI cards with a DIN41612 connector instead of gold
fingers.  The external connector area is where the PCI mounting
bracket is, and if used with an ATX case, this is where the connectors
will protrude through the back of the ATX case.

> So looking at the card from the component side, the DIN connector is on the bottom, connectors on the left.  So nothing should be in top or to the right?  What notes should be added to this drawing to aid the prospective card designer?  Hopefully this drawing can be used as a basis for anyone starting a card.  Everyone, please comment on the dimensions you think should be put on it.

I think we might want to designate an internal connector area
(internal to the ATX case or enclosure).  This could be on the top of
the board or the side opposite the external connector area.

> The other drawing I would like to do has common components that should be on all plug in boards (serial epprom, etc.).  I need help if someone could list what these items are.  I can look at JANUS and OZY for examples.
>
> - Steve N7HPR

Take the drawing as a very preliminary suggestion and you will
understand the spirit in which it was created ;-)

73 de Phil N8VB

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