Tx and rx combo

[RogueTwoRobots]

Hi Adam,

If you suspect it's purely a crystals issue and all other aspects of the tx are still working (screen and LED come on when powered up?), then I'd recommend a FrSky conversion kit for it. It's got three wires that need to be connected to +ve, -ve and a PPM/PWM signal line inside the transmitter, and after that it allows the tx to be used on 2.4GHz with matching FrSky receivers. I've converted two FF6s with these (one on 40MHz and one 35MHz) and they're brilliant; they keep all their usual functionality and it saves you shelling out on an expensive new tx (plus I've lost count of the number of Spektrum TXs I've seen with broken antennae!)

The binding process is dead easy, setting the failsafe process is dead easy, and the connection has always been reliable in the four years I've used them. The Big Nipper guys and Alan from Robots Live (Merlin, Kronic etc) both use them and have had similar hassle-free use as far as I know. Not trying to sound like a FrSky salesman (maybe I should seek sponsorship!) but they really are good pieces of equipment and can revive an old TX for not much cost.

The conversion module: https://www.robotbirds.co.uk/default...le-switch.html

And a link to matching receivers (third and fourth items are the ones I get): https://www.robotbirds.co.uk/default...receivers.html

Also the RC Groups thread I found useful when tackling it for the first time: http://www.rcgroups.com/forums/showthread.php?t=878096

[adamclark]

actually to be fair I've tried several crystal pairs and not much seems to work. Lots of servo jitter but calms when the tx is on, but still not working. It was butchered pretty badly too with additional switch and some 8 way toggle panel taking over a channel as well. Nicads as well, so one for the museum I think..
Frsky looks good, but not wanting to risk it if there is something else wrong, best I would imagine to use on a set that is known to already work before the upgrade.