Re: Printed Circuit Boards for SSNA
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The current version of the Simple SNA also has a generator function built into it. You can use the generator function and a scope to tune an LC filter. The use of the Arduino will not allow sweeps to be made in real time. You would need to redesign the unit using a different, faster processor and probably switch to assembly language. Right now, I do not know of any plans to change processors, displays, input device, etc. However, the this is an open system and anyone can take a try at it.
"building something without experimenting is just solder practice"
From: PHSNA@... [mailto:PHSNA@...] On Behalf Of vk3pe@...
Sent: Wednesday, September 18, 2013 5:59 PM
Subject: [PHSNA] RE: RE: Printed Circuit Boards for SSNA
4Z4ME's photos on this group show a version using a keypad and display. While the PHSNA is a nice cheap simple project, it's usefullness for tuning a filter is limited by the need to use a PC and Xcel to plot the response each time. Do the authors of this project expect to expand the capabilities of the PHSNA in the future, to something like that of 4ZME's version? If so, does the new PCB have this capability (conenctors etc) in the design?
There is an in between possibilty also maybe, that the PHSNA has a display but no keypad, the sweep rates etc being downloaded from a PC initially. In many cases this would be OK as the item to be measured is already known in terms of frequency etc.
I've made a trial order to ITEAD Studio for some small SMT boards for another project.. This is a test of their procedures and quality, as well as the scheme of translating ExpressPCB to gerber files.
Probably be about two weeks or so before I have a verdict. Then I will ask for a hard count of number of boards requested, and I can set a price point. At this point it looks line we'll certainly be under $10 including the CONUS postage. Could be well under if this board house works out. So think about if you want more than one board, since it's not likely I'll do a second run.
I'd encourage DX ops, if you wish, to organize some sort of group drop-ship if there are several folks in an area. It will probably reduce costs. If anyone wants to volunteer to be a drop ship target, please let me know.