how to shorten a receiver antenna?
06-02-2014, 06:47 PM
#16
I just bought a shorter antenna. 100mm.
06-03-2014, 03:38 AM
#17
Fold the cable up and Shoe Goo to the side of the receiver case.
This one was Soe Goo'd onto the chassis, but my TC has it attached to the side of the receiver itself.
No interference at all in over a year of running it like this, including at large tracks used for 1/5 scale and 1/8 nitro etc.
This one was Soe Goo'd onto the chassis, but my TC has it attached to the side of the receiver itself.
No interference at all in over a year of running it like this, including at large tracks used for 1/5 scale and 1/8 nitro etc.
06-04-2014, 06:40 PM
#18
Tech Addict
The total length of the wire is the antenna, not just the exposed tip. Has to do with the frequencies traveling down the wire being tuned to a specific length. I'll see if I can find a decent article on it.
Edit: Here ya go
http://www.rc-cam.com/ant_exp.htm
Long story short, antenna length directly affects wavelength. You may not notice it so much if your receiver can pick up a signal at 100ft and you're only driving 50ft away. But going farther away you'll notice the signal drop off really fast and lose control.
Edit: Here ya go
http://www.rc-cam.com/ant_exp.htm
Long story short, antenna length directly affects wavelength. You may not notice it so much if your receiver can pick up a signal at 100ft and you're only driving 50ft away. But going farther away you'll notice the signal drop off really fast and lose control.
Posted 6/30/13:
The length of the antenna is determined by what frequency range it needs. Longer antenna - lower frequencies (you'll see longer antennae with your older-style AM/FM radios with crystals). Shorter antenna - higher frequencies (2.4gHz).
06-12-2014, 11:01 AM
#20
I'm just surprised that lots of you are willing to mess with the antenna that much. Why don't you just hide it and fold it nicely and save the hassle?
I picked up a trick to bend the antenna tube so it doesn't stick out of the car body. Then the hell broke up due to the glitch. I broke my 977, 747 and Eryx all of them. Since then, I don't mess with the antenna and keep it nice and straight in the tube. Why take your unnecessary time when you have an option to just keep it as it is?
I picked up a trick to bend the antenna tube so it doesn't stick out of the car body. Then the hell broke up due to the glitch. I broke my 977, 747 and Eryx all of them. Since then, I don't mess with the antenna and keep it nice and straight in the tube. Why take your unnecessary time when you have an option to just keep it as it is?
06-12-2014, 02:07 PM
#21
I'm just surprised that lots of you are willing to mess with the antenna that much. Why don't you just hide it and fold it nicely and save the hassle?
I picked up a trick to bend the antenna tube so it doesn't stick out of the car body. Then the hell broke up due to the glitch. I broke my 977, 747 and Eryx all of them. Since then, I don't mess with the antenna and keep it nice and straight in the tube. Why take your unnecessary time when you have an option to just keep it as it is?
I picked up a trick to bend the antenna tube so it doesn't stick out of the car body. Then the hell broke up due to the glitch. I broke my 977, 747 and Eryx all of them. Since then, I don't mess with the antenna and keep it nice and straight in the tube. Why take your unnecessary time when you have an option to just keep it as it is?
I never get glitching
06-13-2014, 12:25 AM
#22
Tech Adept
I just opened the receiver and put the antenna in there. Now, there are only about 5cm of it that are visible.
Never had problems in a year of use. Clean solution, which also keeps any sort of warranty.
Never had problems in a year of use. Clean solution, which also keeps any sort of warranty.
06-13-2014, 03:19 AM
#23
The total length of the wire is the antenna, not just the exposed tip. Has to do with the frequencies traveling down the wire being tuned to a specific length. I'll see if I can find a decent article on it.
Edit: Here ya go
http://www.rc-cam.com/ant_exp.htm
Long story short, antenna length directly affects wavelength. You may not notice it so much if your receiver can pick up a signal at 100ft and you're only driving 50ft away. But going farther away you'll notice the signal drop off really fast and lose control.
Edit: Here ya go
http://www.rc-cam.com/ant_exp.htm
Long story short, antenna length directly affects wavelength. You may not notice it so much if your receiver can pick up a signal at 100ft and you're only driving 50ft away. But going farther away you'll notice the signal drop off really fast and lose control.
27MHz, is a wavelength of 11 Meter
40MHz, is a wavelength of 7.5 Meter
2.4GHz, is a wavelength of 0.125 Meter.
For best results it is technically allowed to have an antenne of 1/4 of the wave length, which gives us with our 2.4GHz stuff an antenne of 3.125 cm
And excuse me, but the actual antenne is only the exposed tip, the rest is coaxial cable!
So yes, technically seen, it is not a problem to cut the cable, as long as you leave the last 3.125 cm core of the coaxial cable blank!
I do suggest to mount the actual antenne (this 3 cm) as vertical as possible, because when mounted flat, it becomes direction sensitive, the receiver will see the worst signal, when the antenne points in a straight line to or from the transmitter. If this happens on a far corner on a bigger outdoor track, you will loose control.
Last edited by M7H; 06-13-2014 at 03:30 AM.
06-13-2014, 04:20 AM
#24
I do suggest to mount the actual antenne (this 3 cm) as vertical as possible, because when mounted flat, it becomes direction sensitive, the receiver will see the worst signal, when the antenne points in a straight line to or from the transmitter. If this happens on a far corner on a bigger outdoor track, you will loose control.
06-13-2014, 04:42 AM
#25
06-13-2014, 07:40 AM
#26
I'd like to give it a try because my antenna is about 20cm^^ (still under the body)
06-13-2014, 08:46 AM
#27
Tech Adept
Hi G-Rem,
it was an RX451 receiver, not sure if it also works with a 471
it was an RX451 receiver, not sure if it also works with a 471
06-13-2014, 09:15 AM
#28
Thanks, I'll maybe try so 
09-08-2015, 01:35 PM
#30
Strip the shield until the inner wire sticks out 31mm
