Antenna replacement

Cant get your radio to work? General Hardware issues?
Post Reply
Koarl
Posts: 203
Joined: Sun Jul 01, 2012 5:08 pm
Country: -

Antenna replacement

Post by Koarl » Sun Mar 11, 2018 8:42 pm

Hello guys!

I just broke one antenna from a X8r with pcb-antennas. I have one spare antenna from a D8r. Is it ok to use it as a replacement? Does the rx work correctly with one pcb-antenna and one normal?

Thanks!

Koarl
Posts: 203
Joined: Sun Jul 01, 2012 5:08 pm
Country: -

Re: Antenna replacement

Post by Koarl » Mon Mar 12, 2018 7:05 pm

I researched that topic a bit, should not be a problem to use two different antennas in one rx. But I would feel a lot safer, if one of you experts could confirm this.

Koarl
Posts: 203
Joined: Sun Jul 01, 2012 5:08 pm
Country: -

Re: Antenna replacement

Post by Koarl » Wed Mar 14, 2018 6:45 am

Nobody?

User avatar
jhsa
Posts: 18034
Joined: Tue Dec 27, 2011 5:13 pm
Country: Germany

Re: Antenna replacement

Post by jhsa » Wed Mar 14, 2018 7:45 am

I would try to find the right antenna. I believe you will lose range if you use the D8R antenna. And you will lose the benefit of antenna diversity because this antenna has less gain than the original..
In other words, I wouldn't do it.. :)

Check "alofthobbies" for buying a replacement antenna for your receiver.

João



Sent from my BLN-L21 using Tapatalk

My er9x/Ersky9x/eepskye Video Tutorials
https://www.youtube.com/playlist?list=PL5uJhoD7sAKidZmkhMpYpp_qcuIqJXhb9

Donate to Er9x/Ersky9x:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YHX43JR3J7XGW

User avatar
bob195558
Posts: 1891
Joined: Sun Dec 16, 2012 7:24 pm
Country: United States
Location: New England, Vermont
Contact:

Re: Antenna replacement

Post by bob195558 » Wed Mar 14, 2018 11:13 am

ErSky9x on Taranis, Sky9x, 9Xtreme, Er9x on 9x with Smartieparts Programmer with TelemetrEZ Board
3D Printing: (http://openrcforums.com/forum/viewforum.php?f=85)


User avatar
MikeB
9x Developer
Posts: 15724
Joined: Tue Dec 27, 2011 1:24 pm
Country: -
Location: Poole, Dorset, UK

Re: Antenna replacement

Post by MikeB » Wed Mar 14, 2018 11:20 am

ersky9x/er9x developer
The difficult we do immediately,
The impossible takes a little longer!

Koarl
Posts: 203
Joined: Sun Jul 01, 2012 5:08 pm
Country: -

Re: Antenna replacement

Post by Koarl » Thu Mar 15, 2018 5:50 am

Thank you, I bought a replacement

User avatar
jhsa
Posts: 18034
Joined: Tue Dec 27, 2011 5:13 pm
Country: Germany

Re: Antenna replacement

Post by jhsa » Thu Mar 15, 2018 8:59 am

Best thing to do really :)

João

Sent from my BLN-L21 using Tapatalk

My er9x/Ersky9x/eepskye Video Tutorials
https://www.youtube.com/playlist?list=PL5uJhoD7sAKidZmkhMpYpp_qcuIqJXhb9

Donate to Er9x/Ersky9x:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YHX43JR3J7XGW

User avatar
ShowMaster
Posts: 4319
Joined: Thu Dec 29, 2011 3:44 am
Country: -
Location: Los Angeles, CA USA

Re: Antenna replacement

Post by ShowMaster » Mon Mar 19, 2018 3:35 pm

jhsa wrote:I would try to find the right antenna. I believe you will lose range if you use the D8R antenna. And you will lose the benefit of antenna diversity because this antenna has less gain than the original..
In other words, I wouldn't do it.. :)

Check "alofthobbies" for buying a replacement antenna for your receiver.

João



Sent from my BLN-L21 using Tapatalk
The x8r receivers I bought early on from Aloft came with the pc antennas soldered on. I sent them back asking for a whisker version. Later ones I ordered from Aloft came with the pc antennas installed and whisker antennas in the package. The antennas were now on connectors.
I swapped out the pc and used the whiskers to better fit my smaller planes.

Typical line of sight flying hasn’t caused any low rssi warnings (42). My lowest is 49 to 51 with 51 being the norm lowest. Typical is 71 range with higher and lower from that.
Flying only fixed wing and staying under 400ft altitude and less than 1000 ft out works for me.
I also read all the many posts about pc antenna mounting to maintain max gain, what side up, and separation angles. Seemed a lot to worry about.
I just separate the whiskers and make one vert and one horiz if possible.
Each flying installation and application is different for our needs so I’m not saying I’m correct, just that for my type of flying, whiskers work well.

User avatar
jhsa
Posts: 18034
Joined: Tue Dec 27, 2011 5:13 pm
Country: Germany

Re: Antenna replacement

Post by jhsa » Mon Mar 19, 2018 3:41 pm

my suggestion is to replace PC and/or whiskers antennas with dipoles. Aloft also sells them. this is what I have on most my receivers, specially my DIY ones.

https://alofthobbies.com/400mm-receiver ... frsky.html

João
My er9x/Ersky9x/eepskye Video Tutorials
https://www.youtube.com/playlist?list=PL5uJhoD7sAKidZmkhMpYpp_qcuIqJXhb9

Donate to Er9x/Ersky9x:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YHX43JR3J7XGW

Koarl
Posts: 203
Joined: Sun Jul 01, 2012 5:08 pm
Country: -

Re: Antenna replacement

Post by Koarl » Wed Mar 21, 2018 8:33 pm

Interesting thoughts, thanks!

The antenna looks similar to that one:
https://www.mhm-modellbau.de/part-FrSky-FAT-1L.php

In general I fly gliders up to 4m wingspan and never had troubles with low signal.

User avatar
bob195558
Posts: 1891
Joined: Sun Dec 16, 2012 7:24 pm
Country: United States
Location: New England, Vermont
Contact:

Re: Antenna replacement

Post by bob195558 » Thu Mar 22, 2018 1:18 am

RF Power Meter.jpg
RF Power Meter
This can help to measure how well different antennas are working: (http://www.immersionrc.com/downloads/ma ... Manual.pdf)
ErSky9x on Taranis, Sky9x, 9Xtreme, Er9x on 9x with Smartieparts Programmer with TelemetrEZ Board
3D Printing: (http://openrcforums.com/forum/viewforum.php?f=85)

Post Reply

Return to “Hardware”