Ordered these

Voltage OK, have used NimH packs as well. Servos work fine via different systems(Spektrum and on 35 - futaba, hitec, gws, jeti) with either power supply.

I've only flown my Frsky setup in my Wildthing on the Orme which has two bog standard 148's same as 3001's except for bearings and they are smooth in operation

Looks like you got the good one Allan

Further info: as previously stated used 4 & 5 cell NiMh packs and A123 pack - no change. Have noticed that the speed of movement of the stick(rate of change of positional information data)has an effect. Slow or very fast movement the effect is greatly reduced. Intermediate speed (like you were doing a string of flowing aeros) has the worst effect. I think it unlikely its a hardware fault on two rx and I feel it would effect all servos equally. I'm swaying towards a software/design fault - possible clash of signal processing rate or trasmission rate with rate of change of positional data??? With slow/small stick movements there is time for everything to take place in an ordered maner. With fast/large stick movements the servo goes into full switch on mode to drive the feedback pot to its required position as quickly as posible(latency/delay of the system is mainly a function of the servo). It's the intermediate rate of change that appears to give loss of data(frames) and the coggy o/p. The fact that some servos appear to work OK could be the design of the servo amp (deadband, digi etc) masking the effect. I've posted this on other forums to see what I get back.

Rich, Don't I always

I doubt it will be a design fault, or software fault that would cause that, otherwise the many other users of FRsky stuff would all be complaining wouldn't they? If it happens on both rx's, and regardless of the power source used, then my first port of call would be the TX module. Are the connections with the host TX good, no loose pins, dry solder joints on the module connector pins? Do you get the same problem when using the standard futaba module and receiver? Can you try the module in another transmitter? Can you try the receivers with a different module? Without trying actions like that it is a bit premature to be saying it is a design fault.

The chances are that if the fault does lie with the tx module, then it is more than likely due to a duff component/faulty processor etc. If you can isolate the tx module as the root cause (see above), wing it back to whence it came, and ask for a new one (or you money back to buy another brand).

HTH
Andy

Andy, it turns out that it has been observed by others and there are threads on it.

One solution on another forum was, quote ''The same problem with a Hitec Optic6 transmitter was cured by changing PPM polarity from negative shift (Futaba, Hitec) to positive shift (JR, Airtronics):
http://www.rcmodelreviews.com/forum/...a634273bc2e9ab
Check posts dated July 25th and 26th.
If your transmitter does not allow shift change, you might have to install an inverter in the PPM line to the module. '' The FrSky system is sold as being compatable, additional bits of electronics is not acceptable.
Also, on this Forum post 26 someone has the same idea as me. There's another thread here
I'll see what I get back from the various forums before making a final decission. But, I'm inclined to ask for my money back as IMO the system/items I have 'are not fit for pupose' under the terms of the sale of goods act. I also believe the BMFA insurance cover is in doubt as I must be sure that it is safe to fly before doing so (ANO) and there is documented doubt in the public domain as to the inegrity of the system on various forums.

Blimey Allan I bet when you look at the moon you can see the dark side

P.S. you've got more stock of servos than Steve Webb's Servo Shop

Brian, we all know what insurance companies are like, if they can find a way out of a claim they will! I only see the dark side when I look at my own ba@ks@de
Servos, a few , just a few.

Ah, if other users are suffering the same issues, then it does seem a bit iffy... Get your money back, and go with a manufacturer who does proper quality checks

Andy

Andy, recent posts on the GiantCod forum suggest it is related to the telemetry Tx unit.

Glad I only ordered the standard one then, what do you need telemetry for you can always tell when it's not righ,t it hits the deck

Allan Warner wrote:Giantcod now have the telemetry version for £58.28 HERE but note that the Rx consumes 100mA as opposed to the standard which consumes 30mA.

You're going to need the telemetry cus your R/X pack is going to discharge three times as quickly

Only one use as far as I'm concerned - vario and altimeter for a glider. I bought the standard rx for my Raptor 30.

Just tested my 3 x 8 channel receivers & transmitter module, all link pretty quickly (not the telemetry version)

Tried lots of different servos
Futaba S148, S3001, S9001,S9101
JR NES 517
Hi-Tec HS-5945 digital, HS-645, HS-101, HS-85, HS-65, HS-55, HS-300
Turborix, mini digital
Vigor VS-12M mini
Savox SH-0255 mini digital
Towerpro SG-50, SG-90
JP Supertec S03

All in all everything worked as it should, I've yet to range check or install the receiver into anything, but I can't see a problem at the moment

Agreed Rich, it does appear that it's only the telemetry tx modul as indicated in the other forums. Still, I think I will be going for a full refund.

Hey Rich, you've got more servos than me Bye the way what tx are you using it on?

Rich wrote:Just tested my 3 x 8 channel receivers & transmitter module, all link pretty quickly (not the telemetry version)

Tried lots of different servos
Futaba S148, S3001, S9001,S9101
JR NES 517
Hi-Tec HS-5945 digital, HS-645, HS-101, HS-85, HS-65, HS-55, HS-300
Turborix, mini digital
Vigor VS-12M mini
Savox SH-0255 mini digital
Towerpro SG-50, SG-90
JP Supertec S03

All in all everything worked as it should, I've yet to range check or install the receiver into anything, but I can't see a problem at the moment

Work busy today then

on leave

Allan Warner wrote:Hey Rich, you've got more servos than me Bye the way what tx are you using it on?

The majority of mine a quality though

Futaba Field Force Super 7

I did the dirty deed tonight flew a power model with FrSky, all went extremely well couldn't fault it, all the range checks were good on the ground & in the air went upto the legal limit (HaHa) a few times with no problems, failsafe worked a treat & reboot time is very good approx 2 seconds. £37.50 module & 8 channel receiver what more do you want failsafe on all channels, Futaba equivalent 8 channel receiver best part of £100, module over a £100

Yep, excellent VFM, I think we are going to see a significant change in things over the next year or two - the mainstream brands cannot afford to ignore this stuff.

Been in contact with FrSky direct and recieved this today
''Hello Allan,
I am coming to update with you that we will release new ROM versions for two way telemetry system's TX module and RX quite soon, which will solve jerkiness problem. Besides, we will make manuals to guide users how to upgrade step by step, by applying some photos and notes. I will surely keep you updated as soon as they are ready, thanks for your attention.

Best regards!
Eva''
Best to talk to the organ grinder than the monkey!
The question now is will the revised Tx module, when in normal non two way mode, opperate the standard Rx without the 'coggy' servo response?? We'll have to wait and see!!!

Once new a girl called Eva, rather well actually, but that's another story and not for the telling of here either