[hpsdr] [ATLAS] Alpha bare board pictures posted - April 6, 2006

[vk4str]

Hi Phil and group,

The photos of Atlas are looking really good, congrats Phil!

Makes me feel like wanting to heat up the soldering iron, hi! No doubt 
you will be doing that right now.

I do have one comment regarding the Atlas concerning the bypass 
capacitors near the ATX PS connector. Due to the length and width of the 
connecting tracks from the ATX pads the bypass C's wont be very 
effective. IMHO it would be better and more effective if they were moved 
as close as possible to the ATX pads with the shortest possible track 
length and maximum track width.

Alternatively another solution would be to have a GND area sourrounding 
the ATX connector on the bottom layer with enough Vias to the top GND 
for low impedance, and to position the bypass C's on the bottom layer 
very close to the actual ATX connector pads.

Or a mixture of the above, bypass C's mounted on top and bottom to 
maximize effectiveness by minimizing connecting track lengths.

I had a look at the FPGA-USB board schematic, WOW!! Phil you really have 
got the Adrenalin flowing! This is an absolutely outstanding effort 
Phil. I need to have a look at the block diagram if I can find it, to 
better understand the connectivity within system components. This is 
exactly what I have been thinking of for a long time.

Thanks for the great efforts.

73, Helmut VK4STR

Philip Covington wrote:
> 
> As promised here are a couple of photos of the bare Atlas board.  I
> will have more pics when I get the connectors and misc. on the board.
> 
> <http://p.covington.googlepages.com/home>
> 
> I did some more testing this afternoon and all is OK electrically. 
> The connector holes also line  up.  I am in the process of soldering
> the bypass caps, connectors, resistors, and leds on the board...

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