2.4 mhz receiver dual antenna.
12-19-2016 | 07:55 PM
#1
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2.4 mhz receiver dual antenna.
2.4 ghz.
New to this type receiver. How important is that 90 degree angle? Planes body to narrow. Should I be running the antennas out side the body like the 72 MHz radio? I have them pretty much straight back on opposite sides and no issues so far. Advice would be appreciated.
New to this type receiver. How important is that 90 degree angle? Planes body to narrow. Should I be running the antennas out side the body like the 72 MHz radio? I have them pretty much straight back on opposite sides and no issues so far. Advice would be appreciated.
Last edited by Yasbush; 12-20-2016 at 04:12 AM.
12-20-2016 | 05:17 AM
#2
My Feedback: (3)
What type of plane? Balsa, composite or carbon fiber fuselage?
You mount the active part of the antenna outside (whiskers), very common in sailplanes.
http://www.espritmodel.com/antenna-2...xit-guide.aspx
If you keep the antennae inside, remember to keep the ends of the antennae (the on,y active part of the antenna) away from large dense objects (batteries, CF wing tubes, etc)
You can use small pieces of pushrod tube or tape to hold the antennae in place inside the fuse.
I use this in all my 2m F3A pattern planes to mount the Rx and antennae makes it simple and clean
http://www.f3aunlimited.com/gator-rc...eiver-tray-kit
90 degrees between the tips is recommended for best reception vs. airplane orientation
If you run 2 Rx (4 antennae...very common in turbines), then you would have 2 in the horizontal plane and 2 in the vertical plane
As always, please perform a full and proper range test before flying to verify antenna performance.
You mount the active part of the antenna outside (whiskers), very common in sailplanes.
http://www.espritmodel.com/antenna-2...xit-guide.aspx
If you keep the antennae inside, remember to keep the ends of the antennae (the on,y active part of the antenna) away from large dense objects (batteries, CF wing tubes, etc)
You can use small pieces of pushrod tube or tape to hold the antennae in place inside the fuse.
I use this in all my 2m F3A pattern planes to mount the Rx and antennae makes it simple and clean
http://www.f3aunlimited.com/gator-rc...eiver-tray-kit
90 degrees between the tips is recommended for best reception vs. airplane orientation
If you run 2 Rx (4 antennae...very common in turbines), then you would have 2 in the horizontal plane and 2 in the vertical plane
As always, please perform a full and proper range test before flying to verify antenna performance.
12-20-2016 | 02:20 PM
#3
I have to agree about much of what ltc said.
When it comes to planes made from carbon fiber, the antenna, regardless of frequency band, must be outside of the structure as RF doesn't readily pass through CF. This is something that many boaters didn't realize and ended up with destroyed boats because of it.
When it comes to planes made from carbon fiber, the antenna, regardless of frequency band, must be outside of the structure as RF doesn't readily pass through CF. This is something that many boaters didn't realize and ended up with destroyed boats because of it.
12-20-2016 | 03:01 PM
#5
The issue here is that these antennas, like all others, do their best receiving when the signal is coming in perpendicular to them. So separating your antennas 90 degrees means that the incoming signal is never worse than 45 degrees, and usually somewhere close to 90 for at least one antenna. You can get the 90 degrees however you want though. One up and one flat, one across and one down, one pointing back and one up, etc. Do whatever you need to to get the shiny end parts straight and 90 degrees to each other and also not lying parallel to any other metal components.
