Airtronics MX3 out of range.

[R3VoLuTiOn]

ive been having problems with my radio lately,

im running an airtronics mx3 75mhz on ch77 with airtronics 94102 and hitec 625 servos, and on both my nitro and my electric, once it goes past 15-20 meters it loses complete control of the car. im pretty sure its not glitching or anything like that, the transmitter antenna is a little bit harder to extend and retract, but i think thats from nitro residue. The only damage i notice on the whole electronics setup is a small nick on the reciever wire insulation thats less than 1 mm long, and definitely not cut into the wire itself.

i have installed a venom 1100mah rx pack from 4 aa's, but that should be whats causing problems, because i dont use the rx pack on the electric. could i have damaged the rx by plugging the rx pack into channel 3 instead of the batt slot?

please help me guys, i have no idea what could be happening.

[RCFUN2]

Did you happen to droped the radio? I had the same problem a while ago, I used to loose control after about the same distance, bought a new radio and the problem went away. Try someone elses radio, if you can, with your receiver.

[bullmastiff]

I would bet the problem your having is with the nick in the antenna. The plastic or rubber coating is to also keep outside signals from getting into the antenna.

I used to work for a cable company so I know a little about dishes antennas and stuff.

Try puting some electrical tape around it, or the liquid plastic dip allot of guys use to seal up their receivers.

I bet that will help your problem. The farther away your vehicle gets your transmitter signal decreases and the antenna will pick up alternate sources of radio waves. The little nick in your antenna is allowing other radio sources to enter your antenna.

Let me know if it works.


Bryan

[R3VoLuTiOn]

but the thing is that it isnt glitching, its just losing reception after a certain point.

:S

[bullmastiff]

It could be accepting enough interference after that certain distance to overide your transmitter frequency.

Like was said I would try a different receiver if you can and a different transmitter. Do both.

Let us know I'm curious what the problem is. I'm just trying to help, not saying I exactly know.


Bryan

[Piggy89373]

R3, something else to try is make sure the transmitter antenna is screwed in all the way. If it was screwed in all the way before, remove it, clean the contacts thoroughly, and screw it back down.

From an RF viewpoint, if the vehicle isn't glitching, then chances are, it's probably not the receiver. Even if there is a small nick in the cladding but the antenna wires are not cut, then the reception won't change. Additionally, having the cladding cut will not play a part in interference unless the newly exposed wires are in contact with a conductive surface (ie. metal or nitro fuel).

I'd take RCFun's advice, and try another transmitter. If you don't have another or have a friend that has one, you can always drag it down to your lhs an see if they'll use one of yours. Typically, most lhs's will go for this because if it's faulty, you're much more apt to replace it on the spot and buy from them.

[Jeckler]

I would bet the problem your having is with the nick in the antenna. The plastic or rubber coating is to also keep outside signals from getting into the antenna.

I used to work for a cable company so I know a little about dishes antennas and stuff.

Try puting some electrical tape around it, or the liquid plastic dip allot of guys use to seal up their receivers.

I bet that will help your problem. The farther away your vehicle gets your transmitter signal decreases and the antenna will pick up alternate sources of radio waves. The little nick in your antenna is allowing other radio sources to enter your antenna.

Let me know if it works.


Bryan

Sorry, you don't seem to know nearly enough. The jacket on a receiver wire does as much good rejecting RF as a piece of paper would being used as a bullet-proof vest.

[Piggy89373]

Jeckler, that was a bit harsh man, but excellent analogy. He had the right idea, just the wrong type of wire.

R3, it wouldn't be a bad idea to take bullmastiff's advice and seal the nick. If nothing else, it'll help prevent corrosion later on.

bullmastiff, the cable you're used to dealing with is metal shielded (foil shielded to be more exact.) The foil shielding on coaxial cable helps isolate and rf shield the center conductor. On a rubber cladded wire used for an antenna, it does nothing but shield the copper from conductivity with metal and help prevent corrosion.

[Jeckler]

Hey, I said sorry. :)
It was just so outrageous something had to be said. I can't even begin to fully dissect the mis-information presented.

[R3VoLuTiOn]

heh thanks guys, im gonna try my friends xs3 to test both the tx and rx, hopefully its just a dirty antenna contact on the tx.

another thing one of my friends mentioned is that i could have stretched the reciever antenna wire causing it to go out of range.

[redheat8]

Well are the cells charged on the tx? and is the crystal good, RED

[R3VoLuTiOn]

Well are the cells charged on the tx? and is the crystal good, RED

the cells are charged, display shows 10.5v. these are the same rechargeable cells as before when it worked fine.