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[quote][i]Originally posted by Steve[/i] After reading a guide on RC gruops I ordered a couple of those SAW filters to do the GPS filter mod, the benefits of this are to filter as much as the background RF noise as possible to get a cleaner quicker lock. Most GPS units have one of these but for some reason DJI skimped on this part which only costs a couple of quid. The pieces are very small, as highlighted by this image of the filter next to a 5p [img]https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/933921_177816095707014_288467871_n.jpg[/img] Cut the trace and scraped some of the green coating to expose and earth point [img]https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-frc1/298000_177816112373679_491568992_n.jpg[/img] Soldered some wires to it, I used stranded wire for this rather than a piece of tinned core, because I wanted it to remain flexible and not pull the pads off the SAW filter [img]https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-ash3/936211_177816075707016_1702231585_n.jpg[/img] Soldered the one wire to the RF in on the correct leg of the chip [img]https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-prn1/934075_177816175707006_1245297227_n.jpg[/img] Rest of them soldered down and filter in place [img]https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-prn1/3544_177816189040338_147023398_n.jpg[/img] Then simply added some small pieces of sticky foam to finish off [img]https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-ash3/65628_177816209040336_793524803_n.jpg[/img] Testing, seems to work ok, but it was ok before so i dont really have much to go on :lol: having said that I can now get a lock indoors it seems. I live in the country so GPS signal shouldnt be an issue here but main reason for doing it was incase i did ever take it anywhere RF noisy. [Edited on 26-04-2013 by Steve] [/quote]
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