Best RX satellite location ..

[jimmyhorns]

If mmeory sevres for giant planks futaba actually do longer aerials... i's only the end coupl of inches that is aerial..the rest is coax.. so one could in theory widen and place the futaba aerials way more apart to cover those theoretical blind spots wheras the other system needs more sats.

The part about needing more sats simply isnt true, you just need a longer sat lead.

There is no more diversity or better polarity coverage with the futaba receiver compared with a spectrum receiver and one sat.

People moan about how the Vbar is changing sats to get the best signal, and then others chirp in about how moving to futaba stops this issue (because the system is of course so much better because it costs more). The only difference is that the receiver is doing the switching in the case of the futaba unit, and not the vbar, so it doesnt show up on the log. I can do exactly the same with a standalone spektrum receiver and sat if I want the errors to go away on my Vbar log, but in reality, the signal reception is exactly the same.

[tomatwalden]

All, this was never meant to be a thread about spektrum or futaba. I posted the original link because I believe it gave some useful information about how 2.4Ghz works - regardless of manufacturer. If you look at the link I posted - it mentions Spektrum, but the article is about physics.

These physics (as Jimmy alludes to) affects 2.4Ghz receivers. full stop.

Knowing how these signals work, what affects them, and how to avoid shielding/shadowing/whatever is good for all of us!

In my case, I moved my Spektrum sats. I'm sure Futaba owners will benefit from reading the article too, and potentially helping your lovely Futaba reciever work to the best of its undoubted ability!

Peace guys! - hoping for a good weekend flying!

[Jamin_00]

The part about needing more sats simply isnt true, you just need a longer sat lead.

There is no more diversity or better polarity coverage with the futaba receiver compared with a spectrum receiver and one sat.

People moan about how the Vbar is changing sats to get the best signal, and then others chirp in about how moving to futaba stops this issue (because the system is of course so much better because it costs more). The only difference is that the receiver is doing the switching in the case of the futaba unit, and not the vbar, so it doesnt show up on the log. I can do exactly the same with a standalone spektrum receiver and sat if I want the errors to go away on my Vbar log, but in reality, the signal reception is exactly the same.

Indeed we do but coupled with all the missed rc inputs I got as well which showed itself in the model having a spasm of some sort was enough to FORCE me to spend more money At first I was a little unsure what happened but suffice to say I dont get no more issues full stop. Good enough for me and money well spent in my book

[Varelco]

Im getting real bored with this Futaba vs Spektrum rubbish all the time.

Its a good article that, a subject thats easily overlooked. I carefully consider where I put my receivers now. 2.4ghz is very good but we still shouldnt take it for granted, no substitute for decent installation

[bulnose]

Indeed we do but coupled with all the missed rc inputs I got as well which showed itself in the model having a spasm of some sort was enough to FORCE me to spend more money At first I was a little unsure what happened but suffice to say I dont get no more issues full stop. Good enough for me and money well spent in my book

What happened then jamin, u were on spektrum, has some issues, swopped to futaba an now they are gone ?

I had my logo go into failsafe a couple of times , at least i think thats what it was, sats were flashing when i brought the model back in, did it a couple of time, sats were positioned on skids at 90deg to each other 1 each side, i just dont feel confident with it now, had lots of planks just fall out of the sky but maybe that was crappy becs on craps escs that come with wot4 and acro wot foamies, i dunno, i just feel like i wanna change to futaba for piece of mind ..

Varelco, i see u are bored with this futaba/spektrum talk but it seems u have an 8fg so i guess your not worried about it anymore..

On the otherside i have friends who are still using there PCM10x with modules ,BX and 1 sat on there trex 700s with no problems.

[tomatwalden]

What happened then jamin, u were on spektrum, has some issues, swopped to futaba an now they are gone ?

Change anything, and you change the whole system. Somebody could change any unit (eg a futaba) for another (eg. a spektrum) and "fix" a problem. It could easily have been a loose cable however. Unless anybody does root cause analysis of a problem, perceived fixes are just that - perceived.

...., i dunno, i just feel like i wanna change to futaba for piece of mind ..

Then with the best will in the world, you're changing for no justifiable reason. Again I don't include hearsay "my mate says it good" as a justifiable reason.

Varelco, i see u are bored with this futaba/spektrum talk but it seems u have an 8fg so i guess your not worried about it anymore..

I find these kind of discussions frustrating too. not because I don't like the banter, but because they rarely seem to include any science behind the opinions. Call me old fashioned, but evidence is a wonderful thing in my opinion.

I have spektrum, and I'm not worried either. If I had futaba, I wouldn't be worried. I have yet to see any evidence that makes me doubt spektrum (or futaba for that matter). However, again, the link I posted includes useful information for both! (based upon some science! )

On the otherside i have friends who are still using there PCM10x with modules ,BX and 1 sat on there trex 700s with no problems.

... and there you go!

[jimmyhorns]

I have yet to see any evidence that makes me doubt spektrum (or futaba for that matter). However, again, the link I posted includes useful information for both! (based upon some science! )


... and there you go!

But Tom... didnt you hear about this guy, who was using Spektrum, and had a crash... It had to have been the receiver, I mean its not like it could have been anything else

[bulnose]

But Tom... didnt you hear about this guy, who was using Spektrum, and had a crash... It had to have been the receiver, I mean its not like it could have been anything else

this guy ? https://www.youtube.com/watch?v=n63lfsXp998

[jimmyhorns]

this guy ? https://www.youtube.com/watch?v=n63lfsXp998

Yeah thats the one..... because it couldnt have been a servo fail or connector come lose, or wait... a million and one other things...

[tomatwalden]

Best RX satellite location ..

But Tom... didnt you hear about this guy, who was using Spektrum, and had a crash... It had to have been the receiver, I mean its not like it could have been anything else

Nope didn't hear that! Seriously though, all the guys at my local club who use spektrum have been trouble free. One of the guys did have RX issues the other week though on his 7HV. ......

Graham, you use futaba don't you ? ;-)

[jimmyhorns]

Since moving to 2.4 the only problem I have had is with Corona modules and receivers, being that they are utter shit.

FrSky - perfect, no issues
Spektrum - only a mechanical gimbal issue sorted by HH
Futaba - a brief fling with a 6 channel 6EX?... on fixed wing, but only lasted a month or so.

None of the three above have given me problems, including probably several hundred hours flying planks with spektrum gear, as well as a hundred hours or so on helis.

I have seen several Spektrum controlled models go in - without control, but only one of them remains a mystery, the others (3 I think) were all through other things failing (servos' flight pack). On one of those the flight pack left the plane right at the time control was lost.... funny that...

[xygax]

Na that was me... my R6203 on my 450... the heli was on the bench tx ws on... skookum wouldnt initalise....




























important discovery....























The RX looks like its failed






























When its
































18 miles away on my desk ! reinstall it and it was fine...

Steve

[LipolyGone]

Graham's E5 also on futaba went in badly last weekend with zero control flat on its side Tom!
Now that model also has a scorpion backup guard on it.
The artical you linked to is the one I use on all my spektrum installs you'd be suprised how many people think those two wires are both working aerials it suprised me to find only one being an active element & hence not to be shielded by any part of the carbon airframe.
It seems even after spending £1850 on an 18 mz your still not guaranteed a 100% RF signal that actualy gets to your model & is processed.

[tomatwalden]

Steve, Graham was having issues with his 7HV the other week. Seriously though, I don't know what the root cause was, but he was losing control mid-flight .... briefly. Frankly, watching from the edge was pretty un-nerving. I think his RX was blinking upon landing. I think the chances of it being a specific Futaba issue though are slim - more likely a loose connector or something like that.

Fundamentally, I find the whole futaba v spektrum thing a little pointless. I have no worries flying my fleet on spektrum. Ross seems quite happy with his (very expensive) fleet on it, and Justin seems quite comfortable flying his Goblin on it.

I did have a pot fail on my DX6i - but then it's a budget radio and this thread is about 2.4Ghz and how best to maximise reception. It's not a thread about spektrum versus futaba quality comparisons!

[tomatwalden]

Graham's E5 also on futaba went in badly last weekend with zero control flat on its side Tom!
Now that model also has a scorpion backup guard on it.
The artical you linked to is the one I use on all my spektrum installs you'd be suprised how many people think those two wires are both working aerials it suprised me to find only one being an active element & hence not to be shielded by any part of the carbon airframe.
It seems even after spending £1850 on an 18 mz your still not guaranteed a 100% RF signal that actualy gets to your model & is processed.

Oh you're kidding! - that's crap. He's had a bad run of luck recently Graham - hope the damage isn't too bad and you get it back flying soon! All joking aside, it's never good to hear about a crash on a nice model - especially if it's not pilot error. Do you know what the root cause was ??

Martin - indeed. No equipment is problem free no matter how much money you spend on it. Everything has a MTBF figure no matter what brand it is.