Graupner RX and Futaba TX

[belair]

I lately had some problems with my Zoom 400, for some reason or other I sometimes didn't have controle over the heli as I should. I had two crashes. I think it may have something to do with the fact that I have a Graupner R700 rx and a Futaba FF7 tx.
Could that be the problem???????????
Has anyone have an idea????
Let me know.
Belair

[antsis]

Some brands are compatible, but generally it depends on how the rx interprets the signal. Did you do a range check beforehand? Have you eliminated any interference from the motor? Obviously, the best way is to try a futaba rx.

[belair]

Hi Antis,
Yes I did do a range test, at home, but I have wounded the antenna cable around a peace of cardboard because it was to long. It could be that it has some interference from the motor. How do I get that away? I will buy another rx from futaba just to be on the safe side. I have seen some people put the antenna cable in some tubing. What do you think?
Belair

[antsis]

One of the problems with small heli's is the positioning of the aerial. I've seen lots of models with it wound between the u/c struts. This is fine for flying close in, but the range is reduced, so doing circuits could be risky. Putting the wire in a tube is a good way of ensuring your range and avoiding moving bits.

The motor usually has 2 capacitors on it. These are designed to smooth out and ripple and generated noise from the motor. Increasing the value of the capacitors would help as would checking the routing of all wiring.

Unfortuately the only way to comfortably eliminate the rx is to replace it.

Hope this helps.

[Bender]

Assuming its a brushed motor then as ant says check the capacitors are soldered in good, and if the motor is quite old the brushes can start arcing more, this would tend to give "kicky" glitches.
Not sure when you say you are not getting the control you feel you should, is it glitching?

[belair]

Hi Antis and Bender,
Thanks for your help so far, I have a brushless setup with a CC Ph25 esc. So I don't know if that changes anything. My antenna wire was a little to long and I wounded it around some cardboard and the rest I put the rest in a tube. Maybe that is also the problem. The new rx from futaba has a short antenna wire.
Belair