Transmitter help.

[Kisana]

I have a bell 47 and a venom FP (twister variant I think, same parts)
Looking to take hobbie further and I have just got myself a Futaba FF9 tranny.
Managed to set up no prob with bell but the venom twister will not even respond. nothing at all, changed crystalls double checked etc.
tried setting to PPM and PCM...
Any ideas...
Thanks

[SRH990]

You could try reversing the throttle channel, certainly JR & Futaba use opposite throttle settings, for electric flight you always need to reverse the Futaba throttle channel, JR's default works fine.

[Kisana]

Tried that, still no responce, works perfect in old tranny, then swap crystal to new ff9 then no signal at all on any servos.
But do exactly the same for bell and all ok?

[Kisana]

Just phoned model shop...
You cannot use any other tranny apart from one supplied!
Something to do with the walker helis????

[moyesboy]

some of the latest walkeras are pcm.
With pcm the tx and rx must be the same make as each manufacturer has their own pcm coding.
(though you would imagine walkera's PCM is a copy of one of the other manufacturersm - like their helis)

[Kisana]

Ive now setled for using the tranny on the sim.. for now..could I just change the reciever in heli? it has built in gyro....

[heliward0]

Ive now setled for using the tranny on the sim.. for now..could I just change the reciever in heli? it has built in gyro....

na its 4in1 unit so you would need e,s,p rec and gyro

[heliward0]

try taking a look at http://www.flyingsites.co.uk/howto/b...oubleshoot.htm

[Biggles]

are you using the walkera tranny crystal in the ff9 by any chance?

[Kisana]

Just looked at the web site, no real info about the tranny prob, but fixed a bell47 prob..cool
YES using the walkera crystal, and tried the bell47 crystals too..
This is not good! Really wanted to use new tranny, but im not gonna buy reciever, gro etc...
Will wait and get better heli....need to crash this one lots more first!

[Biggles]

You must use futaba crystals with futaba tranny. Just like you must use JR crystals with JR trannies etc etc.

Get a futaba crystal prob solved....me thinks!

[Biggles]

http://www.modelhelicopters.co.uk/ac..._Crystals.html

about 6 quid will get you one!

[heliward0]

Just looked at the web site, no real info about the tranny prob, but fixed a bell47 prob..cool
YES using the walkera crystal, and tried the bell47 crystals too..
This is not good! Really wanted to use new tranny, but im not gonna buy reciever, gro etc...
Will wait and get better heli....need to crash this one lots more first!

if you go into the forum there is disscution about trnys in there dont know if it will help with yours?

[Kisana]

Cool, I did not know about crystals, just thought any would do as long as paired matched frequency....
Next question...what diffference between single and dual conversion?

[Biggles]

try this.....http://www.phoenixmp.com/articles/rc-systems.htm