Jake Stew
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Jake Stew's Groups

Jake Stew's Discussions

Where is the changelog?

Started this discussion. Last reply by Jake Stew Jan 29, 2013. 2 Replies

Would it be possible to get a changelog going if there isn't already one?It would be great as a sticky here, or at least on the instructions or github page.I haven't checked here lately and it would…Continue

APM Completely Illegal to Operate in the UK (as of Feb. 2012)?

Started this discussion. Last reply by Jake Stew May 29, 2012. 8 Replies

I just read this post... http://diydrones.com/forum/topics/waypoints-and-failsaveCAA rules apparently say... (as of Feb.…Continue

Bug with dual monitors... (workaround)

Started this discussion. Last reply by Jake Stew May 29, 2012. 2 Replies

Short story...   MP kept coming up on a non-existant 2nd monitor when I switched monitor setups.Long story...   I switched computers from a dual monitor setup to a single monitor.  I had switched…Continue

Gas Engine Quad, Ideas and Solutions...

Started this discussion. Last reply by John Jan 9. 48 Replies

I had an idea about building a gas powered quad.  It would be powered by some of the new small 4-stroke engines like the honda gx-35.I know what you're thinking... gas engines don't respond fast…Continue

 

Jake Stew's Page

Latest Activity

John replied to Jake Stew's discussion Gas Engine Quad, Ideas and Solutions...
"Why not include a couple of extra propless electric worker motors whose only purpose is to recharge the battery. They could operate by storing energy into an on board capacitor (like a manual flash camera). That could create the needed power to…"
Jan 9
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Sorry for the delay in responding.  I'm still kind of a noob with github.  Some stuff initially got uploaded to the wrong branch.  You can ignore the comments everything was compiled from the master SiK branch. You don't…"
Mar 11, 2016

MR60
Hugues commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"After loading one of the SiK-Serveurperso fimrwares (for a specified OSCVal), via the mission planner tool, I noticed the readme that says that some options were modified : ### "Max Window (ms)" replaced with "Bootloader Main…"
Feb 12, 2016

MR60
Hugues commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I get a clear spike at 434Mhz (I am not sure I see the 600Hz thing, whatever it is). But then what should be the procedure after the 30 sec signal stops ? I suppose I should compare it to another reference signal to evaluate what the offset is but…"
Feb 7, 2016
Karol N commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I think it's 434MHz modulated with 600Hz, but as in my post from Friday it doesn't work like that in my case.Pulsed signal is IMHO like normal operation FHSS - some precomputed pattern, between max an min frequency."
Feb 7, 2016

MR60
Hugues commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Thx Karol, that works. Now I would like to understand the procedure : -when I run ATJ, it emits a signal on the 434Mhz frequency for 30 sec (Jake says 600Hz, but what is that 600Hz ? is it 434, 600 Mhz ?) -Then it emits a pulsed signal : on what…"
Feb 7, 2016
Karol N commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I used realterm. Params: 57600 8N1. First input +++ without any line endings, and after OK reply use AT commands with Windows line ending (CR LF)"
Feb 7, 2016

MR60
Hugues commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"@Jake, Finally took some time to test your 434 tune firmware. I loaded it via mission planner to the radio. But then I can't get any reaction from AT commands. What is the baudrate you've set if any ? (tried putty and arduino serial…"
Feb 7, 2016
Karol N commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Hey folksI have a lot of trouble with my telemetry (range below 100m), so I checked my modems with Jake's firmware. I used commands: +++, ATJ, ATK, ATK, ATK. Every time it transmits on completly different frequency, where as far as I…"
Feb 5, 2016
Michael Utz commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"@ Jake i would like to collaborate with you because i am not able to write the code. first of all it would be interesting to find out if the AFC with the configuration we have right now is working or not. (in moment the setup for AFC is 0x44 instead…"
Jan 13, 2016
Tony K commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"@ JAke. Thank you very much for the time you put and the decision to share your findings. As per the nay-sayers its best to just IGNORE. Its much more attractive to listen to someone who put alot of experimental work into something rather than just…"
Jan 13, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Lively discussion is never a waste of time.  I think Michael stumbled on something really cool with the AFC tuning register. One thing I plan to do is make a good beacon mode for the firmware.  Being on frequency is helpful for that."
Jan 13, 2016

MR60
Hugues commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"@Art, thank you for extensive details about internal works and tolerances. As far as I'm concern since the experiment Jake did lead to a very easy solution (and a fun DIY activity) to implement, I do not understand your insistance on trying to…"
Jan 13, 2016
Art commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Jake,  if your goal to have internal zen about your equipment reaching the state of perfection then it is definitely not a waste of time.  However if you are trying to improve your radio performance then your experiment failed.  Your…"
Jan 13, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"@Michael Utz...  That is an awesome idea!  A runtime tuner is perfect!  Once both radios are tuned in, the air unit can continuously adjust it's tuning value to stay matched to the ground.  The air unit is likely to…"
Jan 13, 2016
Art commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"It just shows that nobody is paying attention or really understands the hardware.  And you don't have to rely on time. Just read the datasheet before you go to all the trouble of writing code and making people jump through all the hoops…"
Jan 12, 2016

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About Me:
Research Scientist
Please tell us a bit about your UAV interest
Fixedwing and experimental rotor craft

Jake Stew's Blog

915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?

Posted on January 9, 2016 at 8:30am 48 Comments

If you happened to get one of those $7 SDR radio dongles from ebay and need to put it to work... here's one thing I tried...

Tune in with the R820T... (Using HDSDR)

This is both radios running on…

Continue

Comment Wall (1 comment)

At 7:45pm on May 6, 2014, Kevin Thomas said…
New user... need help quick. Could somebody here contact jakestew (see his post). Put a packet of grey poupon on my sandwich. The packet was puffy but the mustrard looked ok.

Two huge bites later boy was in taste hell. Tasted like i ate chemicals not food. I mean this was baaaaad grey poupon. Now im nausues, dizzy, sweating and stomach hurts.

I cant find any info on how bad this is for you... Jakestew says he is running tests. I cant contact him because i need to post 5 times or something. Please someone telk him to contact me at moonvortex@hush.com or post his findings please.

Lesson to everyone! Puffy condiment package you are not getting extra so do be like obey they filled this one to capicity. Oh no its not a good thing. Its not even a taste that is of this earth. Im sick and keep burping upnthis burnt plastic copper penny moldy mushroom flavor.

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