Great information Bob, very informative. I was thinking before reading your post that video transmissions from nearby drones would take up a lot of band width....your suggested frequency change seems very wise.

My home field is home to many drone guys, I would say they have world class equipment/knowledge all the way from illegal to professional broadcast guys (I fly in Los Angeles).

They too are on 5.8 GHz video with 2.4 GHz control, but many of the higher end guys fly UHF control links (FHSS at 433 MHz like dragonlink, etc). These systems have many many miles of range, while I think many of the systems we fly on 2.4 GHz are within a narrow margin of not working at ranges of <1/2 mile.

Some UHF drone guys are now migrating BACK to 2.4 GHz for the video link, as the propagation is better. This is a minor problem now, as most of them still use 2.4 GHz for control and the peer pressure is there to not slam 2.4......but it only takes one of them with a high gain 2.4 GHz video system to ruin your day.

The pace of hardware development around drones FAR outpaces traditional RC. They have discovered what many early adopters of 2.4 have known....it is certainly not the ideal frequency for radio control.

I think the jeti system on 2.4/900 is a great step, I think 430 MHz would be much better, in fact a super system would be if we could run spread spectrum on our old 72 MHz band. Huge range and really bullet proof

Lower frequencies are much better

When we enter comparing the radio link robustness from different brands I miss an important point: On first January 2015 here in Europe applied new regulations to the 2.4GHz band (ETSI EN 300 328 V1.8.1) which for maintaining previous RF output power it was necessary to include LBT (Listen Before Transmit) and a reduction of duty cycle limit to 10% for a better use of the band as more and more equipment use 2.4GHz.

It is normal that USA pilots do not know about it as there has been no changes to FCC rules there but in Europe we have "old" and imported equipments which do not comply and modern updated ones that do. When making comparisons we have to be totally sure that all R/C systems are equal regarding rules compliments.

I know personally a situation when a major firm launched a top end R/C car system at the end of 2014, and it was a massacre for the pilots using it on an 1/8 All Road European Championship held in Italy on February 2015 as the top pilots using this new system raced against pilots with old ones and under costumes acquired since the spread use of 2.4Gh,z when organizations do not take R/C systems from pilots. It happened that if while they were racing several pilots with old systems switched on their transmitters on the boxes for making adjustments to their cars, the new compliance systems due to the LBT condition were unable to find enough free channels to keep a robust link and went into Fail Safe producing the worst image on the new radio and important sales loses. And it being that it was just only that "faulty" R/C system which really complied to new legal requirements!.

It must be considered here that there is the possibility we are also comparing equipments manufactured under different 2.4Ghz rules as well as considere the safety implications due to rule changes that may be positive for certain uses but negative and even dangerous for others.

Best Regards,

Hi Sid, our field is located 40km SE of Dubai.

Here is the link for Google Maps (satellite view):

https://www.google.ae/maps/place/Al+...59!4d55.515638


Bob, Matt, Jesus, thank you so much gentlemen for your valuable inputs - exactly what this thread was intended for

Thanks Jesus,

Really informative. So as captain Tarr mentions:
[h=1]FCC Part 15 limits RC 2.4GHz to 247mW and CE conformity limits it to 100mW (perhaps some of you guys can confirm and elaborate on this).[/h]
and considering what you say above, even if theoretically 100 people show up in the field with FASST radios, 50 people with FCC regs and 50 people with CE regs, the ones with lower transmission power could suffer?

What happens in international gatherings when radios come from all over the world to one place? Never heard of an incident like that before.....

Tassos

Hello all from a RCU first-timer

Just read the whole thread and I was positively surprised by the generally adult tone of the conversation. These subject often are quite touchy as we know.

Darryl, would it be possible to get a log-file from your Jeti where you have had RF-issues for closer examination? Even better if you have a case where you have fallen to 900MHz? If you have any and would like to send it, please email to tero (at) rc-thoughts.com, I would like to have a closer look for knowledge-purposes.

By the way, if any of you are coming to JWM 2017 and see a guy there with RC-Thoughts on hisshirt tap me on a shoulder and say hello JWM 2017 is held only 85km from where I live so I'll be visiting quite a lot.

Tero from RC-Thoughts.com

Well,

It's already the NICKname of a few jets trying to make a comeback....

Well one thing is FCC allows up to 247mW and other what really is the power from different brands transmitters. I shouldn´t be surprised FUTABA equipment also transmit at 100mW EIRP in USA also.

Anyway I am pretty sure than more than RF power (do not forget receivers obey only to its linked transmitter and RF power dissipates a lot with distance) it is more dangerous to coincide transmitters with LBT (they search free 2.4GHz channels before jumping) with others which do not comply with LBT (they are freely jumping from one channel to other).

In that situation the LBT transmitter may get in difficulty as to find a free channel and then the possibilities of going into fail safe grew dangerously. An important point for consideration to events organizers.

Of course this is only important in very crowded flying clubs and events with many fliers where organizers do not ask pilots for transmitters.

Best Regards.

@ David Gladwin: Unfortunately, Richard Deutsch has posted that they tend NOT to make all WEA receivers compatible, but prefer a trade-in solution. PB Transmitter - Seite 4 - CORE Discussion+Feedback - PowerBox-Systems | Support-Forum

I only was aware of this topic today and found very useful. In Brazil we experienced same problems Darryl saw in Dubai. A heavy polluted enviroment in some fields. Most fields are okay. I could see this on lost frames on my powerbox after each flight on different fields. Sadly my home field is one of the worsts I have seen. After some lockouts I changes to Jeti. Ds-24 now with 900mhz backup. Q value readings on Jeti corroborated the powerbox frames lost findings. Some fields Q value was between 80-100 and on some fields 15-100 with same plane.

As Darryl said if your have no problems and your fields is okay move forward with your current brand. If not the only way to go now is Jeti. Powerbox in the future will also be an option. This field problem is very real and some guys on good RF enviroment fields just think that other guys that had lockouts are dumb and don't know how to position antennas because they never had problems.

Gabriel

That is understood.

When I reported that Weatronic receivers would be compatible with the Core, I was quoting Emerrich after direct conversations with him.

They make good good points in their website and I will take them up on their offers of discounted receivers. Technology moves on.

That said, I am currently installing a Micro 12 gyro 111 in my new model, one of the last Micros made. . It is an exquisite piece of electronic engineering so if the Core is to be better it's going to be extraordinarily good!

David.

After watching thousands of Youtube videos of RC flying: (I was a mixer driver, we have a lot of wait time sometimes)

The least used radio in RC is the Jeti, the most used are Spektrum, JR, and Futaba.

Most of the radio loss crash videos are Jeti radios in the hands of the pilot. Sorry, just how it looks after hours of watching videos

I fly Spektrum and haven't had a problem, though anything is possible.

Your dreaming again.......probably because we Jeti fliers actually fly.....

Can you post some jeti crashed video here? Is there any lockout? I believe pilot error we can't say crash was due to Jeti right?

What utter gobsh1te

Smells like