DJI NAZA GPS - PepsiCola's SAW filter mod - RC Groups
Thread Tools
Mar 31, 2013, 07:59 PM
Registered User
Mini-HowTo

DJI NAZA GPS - PepsiCola's SAW filter mod


This thread is for discussion of my SAW filter mod to the NAZA GPS. This mod works for all the NAZA GPS units (including the Wookong). It was originally developed and tested on the NAZA-M GPS and might need some small changes for the other units. This mod solves the problem many of us have been having with these GPS units: we don't get satellite lock when the unit is close to our VTx or noisy electronics like the GoPro. With this mod, I have my GPS directly next to the antenna of my 1W 1.28GHz VTx, and I still get more than 7 satellites solidly locked throughout my flights.

For full details of the mod, please visit http://pepsicolarc.blogspot.com/2013...ilter-mod.html.
Last edited by PepsiCola; Jul 01, 2013 at 02:11 AM. Reason: moved main content to http://pepsicolarc.blogspot.com
Sign up now
to remove ads between posts
Mar 31, 2013, 08:45 PM
FPV Racer - N4FPV
Eddie James's Avatar
You rule.
Mar 31, 2013, 09:23 PM
Registered User
Thank you Sir .!!
Mar 31, 2013, 10:13 PM
Registered User
Rrated's Avatar
Great I been having the same problem ! Will be ordering filters . Thanks for the info !!
Mar 31, 2013, 10:23 PM
Snipe the Skies!
snipeworm's Avatar
Awesome work! I have to admit I am thoroughly displeased with DJI over this. Skimping on a 2 dollar part on a $350+ system is ridiculous! I say a recall is in order.
Mar 31, 2013, 10:36 PM
Registered User
Nice, I bet an industrious person with the skills, could make a little cash modding GPS units for people or selling pre-modded units.

-X
Mar 31, 2013, 10:51 PM
Registered User
PepsiCola,
Did you presolder the wires onto the SAW filter before attaching it to the board. And did you then tack it onto the right pads? Thanks.
Last edited by thekubiaks; Mar 31, 2013 at 10:53 PM. Reason: found the answer in the OP
Mar 31, 2013, 10:56 PM
Registered User
Quote:
Originally Posted by thekubiaks
PepsiCola,
Did you presolder the wires onto the SAW filter before attaching it to the board. And did you then tack it onto the right pads? Thanks.
I didn't presolder the wires but that might have been easier - just be super careful when you try to bend the wires after you've soldered them on because the pads on the filter will shear off very easily with even the slightest pressure.
Mar 31, 2013, 11:33 PM
Flying R/C since 1964
kallend's Avatar
Suggest you put it on your blog so it can be found easily.
Latest blog entry: Using a DX9 to "strobe" LED...
Mar 31, 2013, 11:45 PM
Registered User
gottahunt's Avatar
Awesome job PepsiCola! Thank you for the post. Filters ordered.
Apr 01, 2013, 12:53 AM
rc, Rc, RC, RCRCRC
cjz89civic's Avatar
Thank You for the how to. I also just ordered some 3 just in case and some new tips for my XYTronic I 68-3c solder station , 1/64" should do it.
Apr 01, 2013, 01:04 AM
PGR
PGR
Low AltiDude
PGR's Avatar
Quote:
Originally Posted by thekubiaks
PepsiCola,
Did you presolder the wires onto the SAW filter before attaching it to the board. And did you then tack it onto the right pads? Thanks.
Quote:
Originally Posted by PepsiCola
I didn't presolder the wires but that might have been easier - just be super careful when you try to bend the wires after you've soldered them on because the pads on the filter will shear off very easily with even the slightest pressure.
I haven't done this mod yet but I have done quite a few mods like it and here's my suggested procedure:
  1. Cut the trace and clean the enamel off of places you'll be soldering to.
  2. Solder the three pieces of solid wire to the appropriate places on the GPS board.
  3. Anchor the filter with some adhesive film or servo tape.
  4. Trim and bend the pieces of wire so they make contact with the appropriate pads on the filter.
  5. Solder the wires to the pad.

For a wire source you might consider a single strand out of a piece of stranded wire. I think THHN 14 AWG will probably have the right size strands and it's available from most hardware stores.

As I already said, I haven't actually done this yet so there could be something I'm missing, but after studying the photos I don't think so.

Pete
Apr 01, 2013, 01:08 AM
Registered User
Thanks Pete! That's an excellent set of suggestions for how to approach the soldering.
Apr 01, 2013, 01:28 AM
PGR
PGR
Low AltiDude
PGR's Avatar
Quote:
Originally Posted by PepsiCola
Thanks Pete! That's an excellent set of suggestions for how to approach the soldering.
It's you who deserves the thanks, Pepsi! You did the R&D.

Pete
Apr 01, 2013, 03:47 AM
Since 1902. Maybe.
Olivier_C's Avatar
Thanks for sharing, good stuff, stamp of approval !


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Video wireless complete set 2.4ghz lawmate 1w with Saw filter mod on RX Neo360 FPV Equipment (FS/W) 0 Jan 14, 2013 08:39 AM
Found RTF Quad or Hex DJI Naza w/GPS DbleX FPV Equipment (FS/W) 1 Jan 02, 2013 07:39 PM
Wanted Dji naza + gps jetboy51 Aircraft - Electric - Multirotor (FS/W) 0 Jan 02, 2013 12:43 AM
Found DJI NAZA GPS Upgrade Module for the DJI Naza Flight Controller skyhulk Aircraft - Electric - Multirotor (FS/W) 10 Jul 20, 2012 09:47 PM