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UPDATE 11 APRIL 2014 Frsky Taranis X9D Removable antenna adapter

by ronsand, published

UPDATE 11 APRIL 2014 Frsky Taranis X9D Removable antenna adapter by ronsand Dec 27, 2013
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Summary

Adapter to make use of different external antennas on the Frsky Taranis X9D. V2 has a slightly larger outside hole for more clearance on some antennas like the Frsky 7db patch.

There is now also a version supporting the Frsky rp-sma pigtail with 8,8mm thread length.

Instructions

To print the adapter you need to use support material. I printed it massive using Repetier/Slic3r on my Makergear M2.

This adapter need a slight mod to the lower TX case as shown in the photos (easy to do with a hacksaw and a Dremel).

It is designed around a RP-SMA-fm with 11mm thread lenght like this one from ebay: http://www.ebay.com/itm/RP-SMA-female-male-pin-crimp-RG174-RG179-RG316-RG188-Cable-Connector-/160864505174?pt=US_Radio_Comm_Coaxial_Cables_Connectors&hash=item2574458d56
I used RG316 coax directly soldered to the RF-board but you can of coarse use the thinner RG178 coax (both connectors can be found separately or as precrimped pigtails).
Then there is the choice to fit an U.FL connector directly on the RF-board and use a RP-SMA pigtail with an U-FL connector in the other end (this usually has the thinner RG178 coax).

In any case be very careful when desoldering the original RG178 coax so that you don't lift the center wire copper trace from the RF-board. I would say that unless you are quite skilled with the soldering iron and/or desoldering station, don't attempt this on your own; get someone qualified to do the solder-work on the RF-board.

You can find some more information i this thread on Rcgroups (see post #505 and onwards, and there is also some earlier in the thread): http://www.rcgroups.com/forums/showthread.php?t=1966664&page=34

It should go without saying that by doing this mod you risk the chance to fry the rf-card on the Taranis if you power up and run the tx without an antenna fitted to the sma-connector. Don't say I didn't warn you!

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i looked at all the options for taranis on thingaverse and choose this one. I had to be careful using the dremel on the back case but the result was awesome. Nice tight fit that wont twist went taking the antenna off or putting int on.

Please see my comment from 14. Dec 2014. Easy fix.

When I print the part, the inner hole diameter is 6.0mm. The SMA connector is 6.2mm so it will not fit. Also the hole for the nut is very tight.

Edit:
I have opened the stl file in Sketchup and the measurements are correct. Maybe it's the slicer program? I have tested my Prusa I3 Mk2 printer by making a cube 20x20x20mm and it prints spot on. 20.00 and 19.98mm.

It is designed with some clearance. Also please read my previous comment.

I printed these on my Prusa i3 but it didn't fit the SMA connector.
Why don't you left some 0.2-0.3 for gap?
I measure my connector and it has about 6.3mm diameter, so I would get model with 6.6mm internal hole dimeter.
And also I think it's better to make hole for nut a little bit bigger, like 9.3mm instead of 9.
Can you create 2 more models with enlarged gaps or provide a source?

I like it, but it's fragile. I've already broken 2. Which material is recommended?

I can not se how it can be fragile if printed properly from PLA or ABS. You will have to adjust the fit of the adapter and the cut-out in the TX. Also you might need to pre-drill the SMA hole and adjust the hex grove depending on your print quality. If you try to force parts that does not fit properly together something will give.

I tried to print this but was not able to remove the support material without damaging the part. Could you please tell me what settings you use in slic3r please? Thank's a lot

The trick for me was go back to an older version of Slic3r like: 0.9.10b. This made removing the support easy.

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