I do not really look at the current crop of systems (ELRS (915 and 2.4), Crossfire, Tracer...etc) as designed for long range, but more as stronger connections so less chance of failsafes when flying in environments stressful to RF links. On my old ACCST system, I could failsafe by simply flying behind my home. When I shifted to a 900mhz system that became a non issue (after the manufacturer fixed their firmware snafu). An added benefit is I now had a link capable of pushing range out to multiple kilometers. While the systems do lend themselves to being able break rules of ranged flight, that is not their only positive contribution.

A lot of people fly bando and parking structures. What you can get away with flying in a big open field is complicated in many places we fly. If what you have works well for the way you fly, wonderful. For many of us, it might be inadequate for what we are doing so we exercise our options to fit our needs.

Consider also, your friend will be able to leave his TX set to 10-25mw and likely never experience any sort of issue with signal loss. Less heat as the TX power is so low, longer component life.

Thanks, yes, can see the advantage with 900Mhz, but here in the UK he's buying into 2.4GHz, same as he has anyway.

2.4GHz ExpressLRS uses LoRa modulation and that has far better resilience to external RF interference on the 2.4GHz frequency band than the ACCST, FASST, or any of the other "standard" (non-LoRa) over-the-air protocols. Where you get failsafes on those other non-LoRa protocols, you very likely won't get a failsafe when using LoRa modulation, unless you are flying next to a 2.4GHz transmission tower that is pumping out many watts of power.

2.4Ghz is frequency of moisture. You lose a lot of signal behind big bushy trees.
And ofcourse the RF range rule. 900Mhz will always give 2.7x range of 2.4Ghz at same power level, all else being equal.

Maybe one strange advantage of 900Mhz... you can use 2.4Ghz for video.

Hi Roman,

Where do you get 2.4Ghz analog video products. 
Everything that I see in analog is 5.8Ghz.

I don't do digital.

FuriousFPV are the only (mainstream FPV) company that I'm aware of who make a 2.4GHz VRX goggle module. They also make an VTX to go with it...

https://furiousfpv.com/product_info.php?products_id=692

EDIT: It looks like Oscar has an article on the 2.4GHz FuriousFPV kit here -> https://oscarliang.com/2-4ghz-fpv-furiousfpv-true-d

(09-Feb-2022, 04:59 PM)iFly4rotors Wrote: Hi Roman,

Where do you get 2.4Ghz analog video products. 
Everything that I see in analog is 5.8Ghz.

I don't do digital.

ImmersionRC and TBS used to make them in the past:

https://www.immersionrc.com/fpv-products...0mw-av-tx/

https://www.team-blacksheep.com/products...nify_800mW

Not sure there is much of a market for 2.4GHz video links.

Hi Kafie,

First, these receivers look a kind of "BIG".
Next, how does that work with my FXT Viper and EV800D goggles??

Yeah, I am not buying a set of expensive analog goggles.

Thanks.

If your goggles can’t take a module then you will need to get the video in via the A/V in port on the goggles using something like this TBS 2.4 Ground Station: https://www.team-blacksheep.com/products...tbs_gs_2g4

Like I said earlier there is not much of a market for 2.4GHz video in the hobby and so the prices are not going to be as competitive as 5.8GHz and you will find it hard to find many available options.

Yesterday flew maybe 400-500m out over the snow wasteland.
915Mhz BetaFPV ELRS @200Hz, and lowest 100mw setting, I saw the LQ drop to 95-96 on 3" with BetaFPV mini antenna. Until now I thought it was broken stuck at 100.

I was behind tennis court, baseball diamond, and over a line of trees. Also.. I was behind the car. No stutter or anything. The full antenna probably has 3x the range.

I have been testing ELRS with the “mini” antennas and have had great results with them. I have not really pushed the system mush past about 2km and at 100mw, it does not seem to care which antenna is attached…the signal stays above 5:95…except in turns where the antenna is at a 90deg aspect to the TX antenna. It is only for a split second on the quads, have not installed any of the ELRS RX’s on fixed wing yet.

This is about the same experience that I have with my Crossfire system when the antenna is installed horizontally on the airframe. I am really starting to appreciate how well ELRS works!

Namimno have just released a black version of their 2.4GHz ExpressLRS module which is something I was really hoping they would do because I'm not a fan of white modules, so it was finally time to jump on the bandwagon and find out what all the fuss is about with ELRS It should be here in about 3 weeks. To start off with I plan on replacing the FrSky XM+ that is currently on my GEPRC Phantom with one of these ELRS receivers.

Am I the only one who really really missed having 2 whip antennas?

Im not a fan of the T. Its too heavy. Its too thick. and doesnt bend.. just break

(12-Feb-2022, 08:24 AM)romangpro Wrote: Im not a fan of the T. Its too heavy. Its too thick. and doesnt bend.. just break

I like the Immortal T antenna used on my Crossfire module. It's nice and flexible while also being stiff enough when in use which means it can just bend up against the back of the transmitter so it can go in your bag without having to take the antenna off or and without any risk of breaking it.



I'm not keen on the purple colour of the Namimno loop antenna but the module also seems come with a whip antenna so maybe I'll end up using that, or I'll try to get a different 2.4GHz loop or T antenna that has a flexible coaxial stem like the Crossfire one. These ELRS receivers will be going on my micro quads for proximity flying anyway so having a high gain antenna isn't really going to be that important. My big quads will be staying on Crossfire.

(12-Feb-2022, 08:24 AM)romangpro Wrote: Am I the only one who really really missed having 2 whip antennas?

Im not a fan of the T. Its too heavy. Its too thick. and doesnt bend.. just break

http://www.mateksys.com/?portfolio=elrs-r24

They’re still heavy, but they flex and bend.

Snow- I like the purple. I don’t like the stock antenna on my Happymodel es24tx module. It’s too flimsy and I’m always afraid I’m gonna break it. I’ll buy your purple one if I haven’t already bought a different tx antenna once yours arrives.