I was ripping around with my moblite7 and broke the vtx antenna.I want to upgrade the antenna to a lumeneir micro axii but I don’t know how. Do I solder a ufl connector on it or do i connect the antenna directly to somewhere, if so how do I do it? My moblite7 is using a stock diamond f4 5 in one. I would appreciate any help. Thanks

I don’t think you can solder a u.fl connector onto tye Diamond F4 board.

Another issue is that there is no ground pad near the signal pad where the original copper antenna was soldered.

I would get rid of the u.fl connector on the antenna and solder the signal element to the same location as the original antenna and solder the antenna ground to the closest ground pad you can find.

There maybe a ground pad on the underside of the board where the old antenna was soldered. You will need to check this via a multimeter.

Clip connector off antenna, strip back a bit, inner wire goes in the same hole the old stock antenna was in. Expose some of the braided ground wire, and attach it to the closest ground. I and others attached it here (see blue arrow in picture).

It’s not ideal because you end up losing shielding on significan portion of the antenna, but it did *significantly* extend my vtx range.

Double check your board and make sure you are connecting it to a proper ground, there’s at least 3 versions of those boards and I have no idea if they’re all the same layout.

So I solder the ground wire in the antenna to the ground for the battery? Also, I am a noob at the antennas and I don’t really know what the ground wire in the antenna means

the moblite provides one of the most lightweight electronics, 3,5g with vtx and receiver included. the vtx antenna is only an actice part no passive part(ground). the passive element does allow to extend and get the active part in a less interfering area.

i would suggest to stay on the original monopole antenna. it wont brake, it is lightweight, doesnt provide any vibrations... another antenna will be less good there.
as it has a huge poweroutput of 200mw, this should provide good range for a whoop, you might still outperform the rc-link faraway :-)

not sure how the weight of the luminier micro axii is, i guess the tiny truerc antenna is one of the lightest. it might be the better option for a moblite

I do agree with Hugs.

You will failsafe the SPI RX range before you loose video on the stock configuration.

They also probably kept things fairly light weight and indestructible by doing so.

I dunno guys, I was getting really bad reception with the stock antenna at 200mw. I dunno if it’s the angle I put the antenna to but I always get ALOT of breakup when I face my quad towards myself. I’m not sure if it’s because of the canopy I added or something.

The lumenier micro axii antenna weighs about about 1.4 grams and I could cut it to reduce weight…

I don’t really know how and where you mounted the antenna on the moblite7 but did it affect the overall flight characteristics and flight time? I know it’s adding an additional 1.4 grams but is it worth the weight?

(23-Aug-2021, 07:49 PM)Lemonyleprosy Wrote: Clip connector off antenna, strip back a bit, inner wire goes in the same hole the old stock antenna was in. Expose some of the braided ground wire, and attach it to the closest ground. I and others attached it here (see blue arrow in picture).

It’s not ideal because you end up losing shielding on significan portion of the antenna, but it did *significantly* extend my vtx range.

Double check your board and make sure you are connecting it to a proper ground, there’s at least 3 versions of those boards and I have no idea if they’re all the same layout.

When you cut off the antenna connector, you’ll find two things in the wire-
1. A braided outer wire, this is the one that goes to battery ground.
2. Another wire inside of insulation- this one goes to where the stock antenna was.

It was more than worth it to me- yeah, there’s a weight penalty- but I was losing video just flying behind a large bush 40’ away from me even at 200mw. I no longer lose video and was able to bring the vtx power level down.

No noticeable change in flight characteristics or flight time to me, but I’m also not trying to do acrobatic stuff.

I’ll try to remember to take a picture of it later today.
Keep in mind that this is just my own experience- everyone else that responded made valid points.

Check our “propsofffpv” on YouTube. He has done antenna “upgrades/repairs”.. I can speak from experience.. 32.8mm exposed element WILL increase ur range…!!

Here ya go:

You can tell by my frame and canopy that I’m not concerned about adding additional weight.

Wow. Just wow. I can see that you’ve done a lot of upgrades and I’d really do think the additional weight is worth it because you get a crystal clear video feed.
Thanks alot everybody for all you help and understanding

(24-Aug-2021, 09:32 PM)Lemonyleprosy Wrote: Here ya go:

You can tell by my frame and canopy that I’m not concerned about adding additional weight.

the vtx antenna should be positioned the same angle like the fpv cam, upwards.

Make sure you trim the braid back enough so that there’s no chance of it shorting anything out, and secure your antenna so that it can’t rip off the board.

I don’t know that I’d call what I’ve done to mine upgrades, more just repairs making it no longer “lite” but it is now pretty much indestructible. I’ve destroyed everything to the point that the only thing original is the props. Replacement diamond aio board because a motor pad ripped off the original, newbeedrone plaid 20k motors because I destroyed one originally, motor connectors because I kept damaging soldered connections every time I destroyed and had to switch frames, newbeedrone 75mm cockroach frame because I got tired of destroying frames, betafpv canopy because it’s what I had lying around after destroying a couple others, different camera because I scratched the hell out of the lense of the original… it’s had a hard life, but it taught me how to fly.

Actually, the props aren’t original either, they’re just replacements of the same kind as the original. So yeah, nothing left of the original moblite except for bits in my parts bins.

Hugnosed is right, the antenna should be angled up more. It was on mine until last night, I had it apart again to replace something and I didn’t tuck the cable down into the hole in the frame prior to zip tying like I did before, I’ll hafta clip it and reposition it.