[hpsdr] Call for review/collaboration Open VNWA (al la DG8SAQ)

[Rob Frohne]

Greetings!

As a result of not being able to negotiate a purchase through SDR-Kits 
(because we couldn't agree on terms 11-16 in the purchase agreement 
regarding openness)

http://www.sdr-kits.net/VNWA/SDR-Kits_orderingterms.pdf

and because I need eight analyzers for our Analog Electronics 
Laboratory, I have begun an open design based closely on Tom Baier's 
(DG8SAQ) wonderful and very innovative work.

http://www.mydarc.de/dg8saq/

This analyzer utilizes the spurs that are produced by the DDS oscillator 
to extend the range far beyond the fundamental range of the DDS in a way 
also described by Sam Wetterlin.

http://wetterlin.org/sam/

This email is to solicit collaboration and review of my design before 
the circuit board layout is done.  If you have already purchased an 
analyzer, please read your purchase agreement before joining this 
discussion.  It may limit how you can assist.

I have sent this email to three mailing lists:
VNWA
hpsdr
and softrock40
because it could be of use to folk on all those lists.  Probably further 
discussion would be more appropriate on a single list, possibly the VNWA 
list if it is welcome there, or if not, perhaps on the hpsdr list.  I'd 
appreciate direction regarding where the discussion should occur.

My Kicad design files can be downloaded at:

http://people.wallawalla.edu/~Rob.Frohne/VNWA/DG8SAQ-KL7NA-VNA.tar.gz

These files have been produced without seeing any schematic of Tom's 
analyzer, but I attempted to make it as compatible as possible given the 
information that Tom and others have shared on the web.

73 & Happy New Year!

Rob, KL7NA

-- 
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla University
100 SW 4th Street
College Place, WA 99324
(509) 527-2075			 http://people.wallawalla.edu/~rob.frohne

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