Spektrum debuts Quick Connect to address voltage drop concerns

[Boggy]

surely servo's are going to die before this!!

[Goto10]

surely servo's are going to die before this!!

If it were a constant loss (e.g. flat battery) then yeah - but is a momentary high power draw (binding servo maybe?) enough to reset the rx? Thinking about it, I don't really know enough about the problem to comment so I'll shut up. Give me beer.

[Boggy]

lol luv it neither do i so i'll join ya!!!

[ChrisB]

I now have 11 Spektrum Rxs mainly 6200`s and 7000`s,to date in over a year i have had zero problems with any of them,i also now have a second DX7 as a buddy unit and backup,its good that they have added a new function to forthcoming Rx`s but i personally dont expect any of my Rx`s to be changed,i feel the system had been fine to date

I would be horrified if my Rx power supply was dipping to 3.5v not just because of the possible Rx issue..

If i did have an Rx power supply dipping that low then i would blame the supply system,i have a DCUP now and intend to try it on all my helis which all happen to be Align reg powered to see the voltages inflight.

I think Spektrum have adressed an issue which i think is caused by fliers putting more and more electronics and powerful servos on board and not stopping to think about the power drain issue,but i also feel that many regulated systems and BECs may be not giving what is claimed of them

[Bikeracer]

I know it's nothing to do with helis,but I have a Spektrum module in a Sanwa Exzes set on a 1/5 bike.
I recently tried a 7.4v lipo and Bec/regulator with it and two digital Ace 1015 servos and had to give up with it because of runaways.
It seems the problem is with the RX resetting after a voltage drop and as the RX resets it always goes to full throttle as it initialises,the same as when you first switch on.
It gave the same problem when I switched to a 6v AAA 5 cell battery pack used as normal without a Bec.
Never had the problem when using 2/3 size nimhs.

I put a Futaba 3VC with the Futaba Fasst 2.4 module in the same bike and have not had any problems,so I can only conclude it's a problem with the current draw of the Spektrum RX.

Allan

[ChrisB]

Interesting,i am sure i read in a thread that the Futaba 2.4 system also needs 3.5v though

[Bikeracer]

The Futaba needs a 6v supply on the one I use,that's why I initially went for a lipo and Bec,I only used to use a 4.8 pack to save a bit of weight.
I tried a different Spektrum RX to no avail,also tried adding a capacitor and that didn't help either.

Ruined my GP last year,the annoying thing was I lent the Futaba set to another competitor before I knew I was having problems.

Allan

[Disc]

Out of the 4 AR9000's I have, only one still works. AR7000's seem to be a lot better. I've decided to give the Futaba FASST 12FG a try so that I don't have to sit at the field switching my heli on and off until it locks (sometimes it never does)...Never had a low voltage reset yet (have had a high one tho ).

IMO the old rx's shouldn't be replaced FOC. This isn't a problem with the receivers. Spektrum are choosing to build in a functionality to cope with less than perfect power sources that people are choosing to use these days, not to overcome a defect in their gear. You bought the rx without Quick Connect therefore it was sold as advertised...If they replaced the units FOC the manufacturers would be scared to update the products as new technologies and ideas arrive for fear of the financial costs involved in replacing everything...

Trev

I'd be intrested to know how you get on with the Futaba 12fg 2.4ghz, I know someone with the 35mhz version and they seem to like it.

[Philimon]

Of course, at least all spectrum's seem to have unique GUID's...

http://ripmax.com/notification_futaba.asp

[Ashley Davis]

It seems the problem is with the RX resetting after a voltage drop and as the RX resets it always goes to full throttle as it initialises,the same as when you first switch on.

That problem I believe was resolved on all spektrum rx after July 2007. I know on my latest rx that doesn't happen as we tested it when I did all the tests on the Align BEC a week or so back.

[pchristy]

If your voltage drops to 3.5 volts - however briefly - then you have far more serious issues than a slow reboot!

Either your NiCAD is knackered, or you have a high resistance connection somewhere in the power supply chain, or your NiCAD is totally inadequate for the job.

Either way, you should be fixing the problem, not the side effects!

--
Pete

[trvo]

I'd be intrested to know how you get on with the Futaba 12fg 2.4ghz, I know someone with the 35mhz version and they seem to like it.

Sure, will give a full report . It'll have an advantage from the word go because if it's anything like the FF9 the timer will work from the throttle stick and the hold switch will be in the 'right place' . The only thing on the JR 9x2 that I'll miss is the position indicator on the pitch / throttle screens...

Trev

[Tim Procter]

It'll have an advantage from the word go because if it's anything like the FF9 the timer will work from the throttle stick and the hold switch will be in the 'right place'

One of the better advantages from that set..

The DX7 should have the same but obviously doesnt, I miss that feature.

[Ade_Law]

im not so sure 3.5v is that unreachable as per my tests in another thread, my brushless servos are capable of pulling 2.5amps each. something the rx's and servo cnnectors were never designed for.

on my dyna-x my battery monitor would report 4.3 volts during the first flight on a freshly charged 3300 sub C nimh

Ade

[ChrisB]

I think its wise if we were aware of the voltages being given to the radio as i am sure many of us could in theory be in for a shock,as Ade said,these modern servos can pull a lot of Amps and several all working together would make any regulator squirm.

I think its wise if you are running high spec setups that a test is carried out,also like Ade pointed out before,a separate supply to the servos is probably the best way forward,give the old Rx a break for sure