Frsky on a JR Max 66 ( XP 662)

[tommy]

What I would like for fail safe is for the throttle to go to zero but I would like the other servos to remain where they were before you lost signal.
I think this would be best because if you have a momentary lost in signal the servos will be where they were and hence once you get signal back you could continue from where you were. But I would like throttle to go to zero because if you don’t regain signal quickly you don’t want the model to fly off and hit someone.

[TMKits]

I see, It does make sense.....

[RCModelReviews]

It's worth mentioning these things because FrSky has been very receptive to user feedback. They appear happy to consider and implement good ideas -- which is more than can be said for some of the Chinese (and brand-name) manufacturers.

[TG72]

I have a Frsky 2.4 hack module to install in my transmitter.
The yellow board on the back has a plug with 3 wires. Black, yellow and red. Can I use these three?
The trainer plug at bottom right in the pic, has 3 green and one red. I'm guessing the red is ppm ?
As the yellow board holds the old antenna and crystal, can it be removed?
Any help would be appreciated.

I have an older XP-642 and installed a FrSky hack module in it. It looks very similar to this XP-662 but the positive(red) lead is - and negative(black) lead is + with ppm being in the center which is usually the case. The plug on the RF board is mounted in a vertical position just as in the 662 and it can be unplugged as on Bruce's JR-Corona hack video for anyone wanting to make this change. Good Luck