Dx7 &Ar7000 lost connection.

[dunny]

When bring my 600n into land on my second flight yesterday i had a problem with the radio connection.
I flew the heli just past me side on and flared it out to land, as i went to level out and up the throttle/collective i got no response and the heli landed tail first taking out the t/t front gears i thought at first that i'd ran low on fuel and the throttle hadn't responded, but the heli was still running and the rx had gone into failsafe, as the servos were still powered up but i had no radio connection with my dx7.I started to examine the heli and the rx suddenly started to work again whilst turning the rotor head, then stopped, it did this a couple of time i guess.I removed the canopy to see the rx and remote rx as it had lost connection again, no lights were on either rx device, whilst touching the antenna on the main rx it responded to the transmitter throttle stick postion and the lights lit up again on both rx's but not flashing so couldn't be a voltage interuption.(i did measure the battery voltage with the rx and transmitter powered up when got home and it was showing 5.01/4.8v whilst moving the collective stick up and down, i run a 4300 nimh).
I have not been able to get this to happen since but now have a question mark over AR700 and DX7 as don't no which is at fault.
I'm going to speak to HH tomorrow to see what they can come up with.
Btw it's been well over 12months since this heli last made unplanned contact with mother earth so no recent crash to cause the rx to be at question.

Any thoughts/ experience ?

[dav20043]

have you tried cutting the power and getting the lights to flash on the reciever as a test i have had one that dosent flash at power interupt in the past

[dunny]

have you tried cutting the power and getting the lights to flash on the reciever as a test i have had one that dosent flash at power interupt in the past

Yes if you cut the power (switch the reciever off and on) the lights flash indicating a power supply distruption.

[dunny]

Posted my DX7 and AR7000 on tuesady to Horizon Hobby for testing/ repair and got them back 8.30am today.
Antenna as been replaced as it was a little loose were it clips onto the rf board and the rf board as been reprogrammed.
The AR7000 they have replaced for my piece of mind.
This tx and rx were around 18 months old so no longer in warranty, how ever HH have done all this free of charge, that really is customer service, and they deserve to be the top/common supplier for 2.4ghz systems.
I don't think many companies would have turned around my radio quickly or given FOC service for items well outside the warranty period.

Thanks again HH

[Brian Gifford]

Posted my DX7 and AR7000 on tuesady to Horizon Hobby for testing/ repair and got them back 8.30am today.
Antenna as been replaced as it was a little loose were it clips onto the rf board and the rf board as been reprogrammed.
The AR7000 they have replaced for my piece of mind.
This tx and rx were around 18 months old so no longer in warranty, how ever HH have done all this free of charge, that really is customer service, and they deserve to be the top/common supplier for 2.4ghz systems.
I don't think many companies would have turned around my radio quickly or given FOC service for items well outside the warranty period.

Thanks again HH

This is, believe it or not, standard service from HH. They are well known for going the extra mile (or ten!) to keep customers happy. That's why, when I was buying a new Tx recently, I didn't look anywhere else.

[Mylee]

Yep, I've had the same excellent service from HH.

I just hope my loss of signal from TX to RX was just a one off.

[Made2Fade]

I think this is partly why people run 6v + regulated systems on their helicopters. There was a discussion not too long ago about using 4.8v packs with Spektrum RX's. Maybe a search about this will show something up on here or one of the other forums. Its definately documented though. And also the reason i wont fly the (new) 3800mah 4.8v NIMH pack that i have for my Raptor Titan (hack model but never the less). Have got an Align 2in1 reg/remote glow for it now and will purchase a lipo for it soon. Better safe than sorry i say.

[Dedcalm]

I have just made the move to a reg and Li-po in place of my old NiMH 4 cell pack, along with the move to 2.4GHz but I went with Futaba - reported problems seem alot less frequent IMHO (apart from the UID problem a while back). Spektrum certainly seem to be the most popular at my heli club though (only 3 people fly futaba that I know about, 1 x 10C, 1 x FF9 with spektrum module and me with my 10CG). Guess this is price related generally... does what it says on the tin and is a good price.