[hpsdr] Is the Board going to REALLY be that expensive?

[Philip Covington]

On Sun, Dec 14, 2008 at 1:46 AM, richardh at iinet.net.au
<richardh at iinet.net.au> wrote:
>
> What is the problem with the PCB design - drafting?
> Production?
> AFAIK Kicad can do 10 layers
> Dunno about fancy vias though
> I will look at it
>
> Richard VK6BRO
>

The problem is cost of prototypes and production, not the PCB
software.   Check out the price of doing 6-10 layer boards with
partial vias in small quantities.  With most of the BGA packages you
need more than two signal layers in addition to the power and gnd
layers.  Some of the BGA256 with 1mm balls can be done with four
layers total, but that is more of an exception than the rule.

Check out <http://dlharmon.com/dspcard/index.html> for an example of a
four layer board with BGA.

-- 
Phil Covington
Software Radio Laboratory LLC
Columbus, Ohio
http://www.srl-llc.com
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