7E Poor range with NRF24L01 PA LNA

More
20 May 2016 16:52 - 20 May 2016 16:53 #48881 by slo_rider
7E Poor range with NRF24L01 PA LNA was created by slo_rider
Hello... my 7E currently has the A7105, NRF24L01, 2x3 switches mods completed and working good. About a week ago I did the range mod to unlock full range of the CYRF6936 module. I removed the resistor and bridged it with solder. imgur.com/a/gQX2Z
Tested and worked :) my DSMX range was much improved. However, the next time I flew using the NRF24L01 protocol, I found my range was really bad :( like ~35-45ft. I rewired both ends of the existing module, no change. I thought it could have been a bad PA, so I ordered another module w/o antenna from BG US and swapped it. I removed the pins and soldered all connections like I have before, reused the same antenna with the IPX connector.. tested and getting about the same poor range.
I have on order two high gain antennas and an ipx to rp-sma adapter to replace the NRF24L01 and stock antennas.

Any other suggestions what could by causing the poor range?

Here's a recent vid from an fpv h8 mini showing how great my range used to be.
around 2:15 I start going out pretty far


Thanks!
Last edit: 20 May 2016 16:53 by slo_rider.

Please Log in or Create an account to join the conversation.

More
20 May 2016 18:44 #48886 by Flightless Bird
Replied by Flightless Bird on topic 7E Poor range with NRF24L01 PA LNA
I'm thinking the built in module might be interfering with the nRF24L01? Just a guess...

Please Log in or Create an account to join the conversation.

More
20 May 2016 20:52 #48899 by slo_rider
Replied by slo_rider on topic 7E Poor range with NRF24L01 PA LNA
That does seem like a possibility, but I thought that it only powers one module at a time. I did not use any additional shielding when installing the modules. Is there a way to test for interference?

Please Log in or Create an account to join the conversation.

More
03 Jun 2016 15:53 #49879 by ketsa
Replied by ketsa on topic 7E Poor range with NRF24L01 PA LNA
Why would it be interfering ? Aren't unused modules switched off ?

is your NRF24 tx shielded ?

Please Log in or Create an account to join the conversation.

More
03 Jun 2016 16:22 #49881 by slo_rider
Replied by slo_rider on topic 7E Poor range with NRF24L01 PA LNA

ketsa wrote: Why would it be interfering ? Aren't unused modules switched off ?

is your NRF24 tx shielded ?


No, I did not use shielding on the NRF24 module... But I recently replaced the antenna with a high gain antenna and it seems to be working better now.

Please Log in or Create an account to join the conversation.

More
06 Jul 2016 05:01 #51348 by philongct
Replied by philongct on topic 7E Poor range with NRF24L01 PA LNA
Don't use that cheap module.
Me and many people archived the same issue, even it's shielded with tin foil.

Please Log in or Create an account to join the conversation.

Time to create page: 0.033 seconds
Powered by Kunena Forum