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Old Jun 28, 2012, 10:54 PM
9W2DLR
Malaysia, Pahang, Temerloh
Joined Nov 2011
2,329 Posts
Discussion
foxtech 5.8ghz $15 VRX for FatShark Dominator mods

I have a FS dominator basic reason didnt buy the built-in VRX because the VRX is expensive while the China made VTX/VRX is cheap like nothing and FS VRX not compatible with the cheap one, so I decided to make my self one for my FS goggle

UPDATE:

10/07/2012
Initial testing was not good, range is awful even with my Clover leaf antenna i think it less than 10 ft, I will need to change the antenna mount which I have already receive from ebay.

05/10/2012

Got new RX from Foxtech every is soldered up, Initial ground test seem fine gonna do more test at the field!

09/10/12

Test was successful! after 20 flight the vrx work as i wanted it to!

Part list

- Header pin (need 9 pin)
- Perf board or some shop call this donut board
- PCB Mount SMA male for the VRX note most 5.8ghz use RP-SMA making it to use SMA mean you have to make your own antenna or use a converter
- VRX of course ebay sell the in pair which is recomended! as $22 for a pair!, but Foxtech sell the VRX for $15

http://www.ebay.com/itm/251063978745...84.m1497.l2649
http://www.foxtechfpv.com/rx5808-58g...ule-p-303.html

I have not tested it yet as my VTX is broken once I get a new VTX or soldered the bare VTX modules I post the result,

Now maybe picture of the build log will give some interest

the parts


no pcb mount yet so i use the one from my broken VTX



Test fitting the component :

Look nice enough


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Last edited by skellator; Oct 15, 2012 at 11:46 AM.
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Old Aug 08, 2012, 02:25 AM
Registered User
Perth, Western Australia
Joined Jun 2009
488 Posts
Hi Skellator,
I too am looking to do this mod and have ordered the parts. Sorry to hear that you had poor reception after doign such a nice job of the build. Looking at your photos though, I wonder if you have soldered your connections on the wrong side? If you look at this other thread with similar mod, he reports some success. Anyways, I may be wrong as I haven't tried this myself yet, but thought I'd just share my observations from the photos.. Maybe your range could be inproved by relocating the soldering?

http://www.rcgroups.com/forums/showt...ghlight=rx5808
Good luck
-Matt
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Old Aug 08, 2012, 06:44 AM
9W2DLR
Malaysia, Pahang, Temerloh
Joined Nov 2011
2,329 Posts
my soldering are correct the modules silk screen are not printed properly that why you see it like in the picture , my initial suspect is the antenna mount waiting for some new mount
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Old Aug 08, 2012, 08:38 AM
Registered User
Perth, Western Australia
Joined Jun 2009
488 Posts
Quote:
Originally Posted by skellator View Post
my soldering are correct the modules silk screen are not printed properly that why you see it like in the picture , my initial suspect is the antenna mount waiting for some new mount
Aha Cool! I see what you mean now on second review of your photos. Maybe your module is bad?

Also I have read some reference to needing a capacitor, and then not needing it... google rx5808 fatshark and you'll find some info on fpvlabs...

Anyway, hope you get it working the way you want to. I will try the same soon (when parts arrive). I'll let you know how I get on.
-M
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Old Aug 08, 2012, 08:47 AM
9W2DLR
Malaysia, Pahang, Temerloh
Joined Nov 2011
2,329 Posts
I have another RX to test it again i might solder that one
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Old Jul 07, 2013, 03:58 AM
gettin' there
wepoo's Avatar
Australia, WA, Perth
Joined Jan 2011
26 Posts
Hey, sorry to jump in late but how did it go fixing up the reception?

I've just ordered some parts to mod my Fatsharks.
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Old Jul 07, 2013, 05:24 AM
9W2DLR
Malaysia, Pahang, Temerloh
Joined Nov 2011
2,329 Posts
Quote:
Originally Posted by wepoo View Post
Hey, sorry to jump in late but how did it go fixing up the reception?

I've just ordered some parts to mod my Fatsharks.
my old module was bad, swapped with a new one all when ok
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Old Aug 07, 2013, 07:55 AM
gettin' there
wepoo's Avatar
Australia, WA, Perth
Joined Jan 2011
26 Posts
Hi,
I just tried this mod and ruined the RF mount. Just burnt it.

Any tips on mounting the antenna?
Is it flush with the board? How do you get the RF pole to sit in the small spot on the board? Do you reenforce the connection so it won't break off when you screw the cloverleaf on/off?

Cheers!

I've got another RX5808 on the way now.
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Old May 20, 2014, 11:47 AM
RC pilot by soul
Israel
Joined Apr 2005
2,535 Posts
Skellator,

where did you find the pinout of the fatshark female header?
also does the channel switching work properly via the switches on the FS goggles?
i would like to do the same for my Dom V2s. thanks.
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Old May 21, 2014, 12:07 AM
Registered User
Perth, Western Australia
Joined Jun 2009
488 Posts
Quote:
Originally Posted by i3dm View Post
Skellator,

where did you find the pinout of the fatshark female header?
also does the channel switching work properly via the switches on the FS goggles?
i would like to do the same for my Dom V2s. thanks.
Hey there,
See my post #10 on the thread below for all the info you need.
It works great BTW. :-)
http://www.rcgroups.com/forums/showthread.php?t=1700474
Cheers,
Matt
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