Wow I didn't know the RDF42 was that expensive. It's made from low cost components, so I thought it would be much less. I assume you still have to provide the radio too right?Streets814 wrote: ↑Thu Nov 07, 2019 12:49 pmA little background first. I have had my ham license for a little less than a year now. Other than radio communications, what attracted me to the hobby is Direction finding and data over radio (see AREDN project.) I have purchased another Direction finder (http://members.chello.nl/~w.hofman/pa8w/rdf.htm) and (https://radiodirectionfinding.wordpress.com/) if you are familiar with RDF mapper (http://www.musther.net/RDFMapper/) you most likely know about the direction finder linked above.
Having purchased the RDF42 (which cost between 2-3 times the price of the Kerberos SDR by the way) I came to the harsh realization it was a bit more complicated to assemble than I anticipated. Unfortunately, as a result, it sits in its original box with all the pieces unused. I have been following this project for a while now wanting to try it out, but hesitant to not have another unused device sit on my shelf. The idea of a plug and play ready to use version greatly appeals to someone like me. To be honest I want to pull the trigger on purchasing just to support the project.
With that said here are some things someone of my ability/knowledge (minimal) would find interesting or would like to see:
• Truly plug and play. Its easier (for somone like me) to tinker and learn than to have to build from scratch. while the Kerberos board is a lot easier than other systems I have seen, the easier to get started the better.
• If you add a small screen as mentioned something like the RDF42 screen (https://radiodirectionfinding.wordpress ... ot-screen/) makes a lot of sense. Right half has a direction bearing pointing in last X amount of directions averaged. The "ex" (bottom right) shows when an accepted signal has been sent to the computer. Center bottom is the symmetry meter above that (numbers) and to the left of that (bottom left corner) is the elevation meter which I am not sure how works to be honest. You can see the "quality" of the signal in the center of the screen just to the left of the direction pointer showing "Q8." I believe the signal is graded 0-8 and can be used by the user to set a rejection threshold. Meaning if the user sets the threshold at 5 any signal lower will be ignored and not sent to the computer for direction finding.
• Anything that will assist with using multiple devices together. As stated above I am also following the AREDN project a lot as well. The idea of a ham radio mesh network using wifi on the ham bands over long distances may have a lot of options with the kerberos. If I have multiple sites and install a kerberos on each site I could (in theory at least) simultaneously get a reading from the kerberos and see in real time the direction/source of the signal using mapping software like the rdfmapper.
•Ease of use. If there are easy to find simple to understand controls/features it makes life simpler for someone at my level. dials, knobs, sliders (real or virtual) that are self explanatory go a long way. I am not suggesting dumbing down the project but rather quick access to learners rather than digging deep into the settings like advanced users. Maybe a basic GUI for new users?
• Price. While you have no complaints from me on the affordability of this device and project as it is by far the lowest priced direction finder option that I came across (by a large amount.) The ease of affordability on the wallet will keep this project in as may hands possible.
Next steps will definitely be focusing on ease of use. Since KerberosSDR is so new, and code so fresh the first stage was always going to be to get it working well, but requiring setup and tinkering. Now that it's been proven to work well we're looking to start on a more complete product with an out of the box experience for various applications.
We already have a compass display and this could go onto a built in screen. But as mentioned in my other reply, a simple compass display like this is really quite useless in many situations. A GPS+mapping program that determines an estimated TX location is really key as multipath can have you going around in circles if you just constantly followed the bearing only.