About

About Me:

Research Scientist


Please tell us a bit about your UAV interest

Fixedwing and experimental rotor craft


Activity Feed

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 need to worry about bootload…"
Mar 10, 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
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 experience the most temp drift, s…"
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!?
"I didn't find any data about the "spectacular range boost"  Seems like an entertaining albeit rather pointless frequency analyzer exercise

Hopefully I haven't billed this as anything else.  You are misquoting me though.  The title was "Spectacular…"
Jan 11, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Done! Files here...
https://github.com/jakestew/SiK/tree/Serveurperso
So the basic procedure is to download Jake_Tune_Adjuster_(925 or 434).ihx, and flash it onto your radio using the standard 3dr radio config program.
Then open a terminal window to…"
Jan 10, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Point about 915 vs 433...  My test firmware "Jake_Tune_Adjuster.ihx" is written for 915 radios only.
It *should* work on 433 radios, BUT it will still set them to 925 MHz.  The 3 lines are these...
MyFreq = 925000000UL;
Should just have to change th…"
Jan 10, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Darn, lost a post...
Anyhow...  SiK firmware compiles in linux.  I use the Kali linux VM with VMware.  There is also a Kali VM for virtualbox.
I use the 32-bit Kali VM and run it in my normal Win7 x64 environment.
Basically you just have to... downl…"
Jan 10, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"Re: Live autolearn tuning...  I thought that it might be handy to have one radio transmit while you get RSSI from the other, and in that way tune one to the other.
In fact, RSSI does seem to work with the radios, even in their beacon state.  So some…"
Jan 9, 2016
Jake Stew replied to Jack Rogers's discussion HopeRF-TRP 3DR MavLink Attack
"Check out my blog post on tuning the 3dr radios...
http://diydrones.com/profiles/blogs/915-mhz-3dr-radio-tuning-with-7...

You'll be fighting with windows forever on this.  The Kali VM will download overnight and you'll be compiling your custom firm…"
Jan 9, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I'll have the source up soon.  All credit goes to Michael Smith and Andrew Tridgell.
I just kluged in some code into the at.c file to make the needed changes.  It's ugly, but it does the job and wasn't meant to be flight firmware. "
Jan 9, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I'm running 208 (+4) on one and 199 (-5) on the other.  One was high and the other low.  
You certainly can just tune one or the other radio.  Luckily for me, as you can see above, my radios were on opposite sides of being correct.  Therefore I just…"
Jan 9, 2016
Jake Stew commented on Andreas Habit's blog post Dragonlink V3: LRS System as well as Telemetry Link 40km Range
"Problem with DL is it uses (and can only use) ATV band frequencies.  So when some ham flips on his 100W video transmitter your plane is toast."
Jan 9, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
Jan 9, 2016
Jake Stew commented on Jake Stew's blog post 915 MHz 3DR Radio Tuning With $7 SDR Spectrum Analyzer! Spectacular range boost!?
"I just posted some firmware for anyone to try AT THEIR OWN RISK.
Works fine with my old 915 MHz v1 3DR radios.  Otherwise YMMV.
The test firmware is only for testing purposes.  It's poorly written and it is very easy to just grab the right firmware…"
Jan 9, 2016
Jake Stew posted a blog post
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 one channel.  They are out of tune enough that the chan…
Jan 9, 2016
Jake Stew replied to Jack Rogers's discussion HopeRF-TRP 3DR MavLink Attack
"Mono is only for building the GUI settings tool.  Shouldn't need it otherwise."
Jan 9, 2016
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