Originally Posted by Opt

Build a buffer to amplifier the signal. You'll want a non-inverting opamp circuit with a gain of ~3 .

Is there any info on how to do this?

Does anyone have a link explaining how to do the firmware upgrade?

http://www.rcgroups.com/forums/member.php?u=352541

Bottom of that page.

Hi Sid,

I just received the RangeLink set from you this morning. It looks great. Thanks for your good services.

I am going to mod my DX7 following the article here:
Interfacing Spektrum DX7 to either DragonLink, EzUHF, Thomas Sherrer, or ChainLink LRS



Because I don't have the quality 5 pins switched stereo 3.5mm female jack (the cheap one at my local shop is too bad, unuseable), I just only have the good 3 pin stereo 3.5mm female jack with no switches,

I would like to know If I just solder the ground pin, PPM pin and the V+ pin from the J2 connector at DX7 mainboard side in the picture above to the 3.5mm female jack for connecting with RangeLink Tx, will it work with no issue?

I don't care about the 2.4Ghz and 433Mhz transmitter working at the same time. I only care about if it will have an issue.

Thank you!
(Sorry about my bad English )

Hi Sid,
I got my RL. Fast shipping, thanks. Units that shipped in April, what firmware do they have on?

Cheers,
Minh

Originally Posted by sid.huang

because JR radio out ac ppm signal, and old tx cannt handle this.

"Old Tx PPM input, ensures compatibility with 3.3v thru 12.0v PPM levels.(DC)"



Sid

Then how come it works after doing a few random things like power RL, then plug in ppm, Un-power RL, power RL and bingo, it works! It's not always that same routine but I can usually get it working after a while, and once it works it stays working till I turn it off. If there is no fix for it then so be it I'll just play the plug game but I still would like to be able to have it work first go every go?

Originally Posted by Teamsherman

Then how come it works after doing a few random things like power RL, then plug in ppm, Un-power RL, power RL and bingo, it works! It's not always that same routine but I can usually get it working after a while, and once it works it stays working till I turn it off. If there is no fix for it then so be it I'll just play the plug game but I still would like to be able to have it work first go every go?

Its abit on a worry not working every time, I'd be worry about failing mid flight.
Have you tryed a 2nd pnp cable?, to just confirm its not the cable

The cable works flawlessly on three other radios (DX8, Eurgle 9X and Turnigy 9X) so I think it's something to do with my JR PPM strength. I just have no idea how to boost it.

Originally Posted by tuongnhu

Hi Sid,

I just received the RangeLink set from you this morning. It looks great. Thanks for your good services.

I am going to mod my DX7 following the article here:
Interfacing Spektrum DX7 to either DragonLink, EzUHF, Thomas Sherrer, or ChainLink LRS



Because I don't have the quality 5 pins switched stereo 3.5mm female jack (the cheap one at my local shop is too bad, unuseable), I just only have the good 3 pin stereo 3.5mm female jack with no switches,

I would like to know If I just solder the ground pin, PPM pin and the V+ pin from the J2 connector at DX7 mainboard side in the picture above to the 3.5mm female jack for connecting with RangeLink Tx, will it work with no issue?

I don't care about the 2.4Ghz and 433Mhz transmitter working at the same time. I only care about if it will have an issue.

Thank you!
(Sorry about my bad English )

Yes, you can do that, but still recommand you used the 5 pins switched stereo 3.5mm female jack. You just wanna to use the same battery right?
if not you directly to used the trainer port. with pnp cable 2.


Sid

Originally Posted by flashervn

Hi Sid,
I got my RL. Fast shipping, thanks. Units that shipped in April, what firmware do they have on?

Cheers,
Minh

tx v1.26/ rx v1.23; if you dont wanna to use the link qulity indicator,no need to do upgrade.



Sid

Originally Posted by sid.huang

Yes, you can do that, but still recommand you used the 5 pins switched stereo 3.5mm female jack. You just wanna to use the same battery right?
if not you directly to used the trainer port. with pnp cable 2.
Sid

Yes, I want to use one battery for both dx7 and RL Tx
Thanks.

Originally Posted by Teamsherman

The cable works flawlessly on three other radios (DX8, Eurgle 9X and Turnigy 9X) so I think it's something to do with my JR PPM strength. I just have no idea how to boost it.

Anyone?

You shound take a look at this tutorial: (your JR tx should be similar)
Interfacing Spektrum DX7 to either DragonLink, EzUHF, Thomas Sherrer, or ChainLink LRS

It said that the PPM’s signal power of the trainer port is a lot weaker than the internal PPM bus signal . So the solution is getting the PPM signal from the internal PPM bus, no need to have any extra booster.

Hmmm, I think I may have to just use my DX8 when I get it back. I really don't want to screw around with the internals.

Originally Posted by Cir2kuk

http://www.rcgroups.com/forums/member.php?u=352541

Bottom of that page.

Anyone else having trouble un-zipping the revision3.zip?