[hpsdr] Mercury-EU and Mercury what is the difference?

[Chris Gomoiu]

I"m also looking for a second Mercury board and I sure would like boath
bords to have similar receiver characteristics as much a possible. What to
do? Order a Mercury-EU or wait for maybe another run of boards based on the
published TAPR design?

>From pictures of Gerd's Mercury found on his site
http://www.hpsdr.eu/Baugruppen/Mercury-EU.htm one can see quite noticeable
layout differences to the TAPR board.

While I do not question Gerd's design in any way, knowing the efforts which
are being made nowadays with Hermes PCB layout design optimization, I
presume that the TAPR layout has also been extensively tested for best
achievable performance as a receiver.

I would like to know from Gerd if his layout passed similar tests and if
there are comparative measurements as far as noise or spurs been made
between boards. Would be nice to hear also from forum members using both
boards.

I would not be surprised to find out Mercury-EU layout to better TAPR as is
newer but this is a presumption from my side. At least to me, from the
picture it looks that efforts have been made to better separate the
input-analog side of the board to the digital part to maybe improve the
design.

Would sure appreciate Gerd's point of view, thanks!


73's
Chris 4X1RF
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