spectrum receiver distance issues

[teambowen]

Hi Guys.
I run a spectrum wheel radio and i have a couple of receivers that have issues at distance.

To try and resolve the issues i have replaced the aireal and cases on both units with no aparrent difference.

Both receivers are fully working but one stop's working totally at say 25 metres and the second throws a wobbly at the same distance.

I have tried them in both nitro and electrics cars, which makes no difference.

Can anyone tell me where or if i can send them off to get them checked as they're not cheap.

The rx's are sr3100 model abt £50 ish each.

It is almost as if the receiver signal amplifier is not recognising the tx signal strength is reducing and thus increase the amplifier gain.

Any idea's !!!!!

Jamie.

[vladimir]

Not sure how it is on your spectrum but my Acoms has got a fiture called Failsafe (to stop a car running away from you at long distance). So when the car is more then 25m away it blocks throttle only (servo keeps working for another 100m). so if your servo works fine at say 50 meters then most likely it will be an answer to your problem.

[Benh]

Originally Posted by teambowen

Hi Guys.
I run a spectrum wheel radio and i have a couple of receivers that have issues at distance.

To try and resolve the issues i have replaced the aireal and cases on both units with no aparrent difference.

Both receivers are fully working but one stop's working totally at say 25 metres and the second throws a wobbly at the same distance.

I have tried them in both nitro and electrics cars, which makes no difference.

Can anyone tell me where or if i can send them off to get them checked as they're not cheap.

The rx's are sr3100 model abt £50 ish each.

It is almost as if the receiver signal amplifier is not recognising the tx signal strength is reducing and thus increase the amplifier gain.

Any idea's !!!!!

Jamie.

I once sent mine across a field (curiosity) worked fine until I could drive it no further, about 100meters. Might be worth checking/ replacing the aerial. May have been pinched/ knicked and your rx distance dramatically reduced.

The SR3500 less fussy, just tucked the aerial in amongst the other wires and it would just keep going. As soon as moved to the SR3100, that would need to go into a tube and hang out the top exactly as per instructions, or it would do as you described at about the same distance.

[MatJohnson]

Mine cuts out at about that distance, do we have any tracks which have 25m+ away from the rostrum?

Also, are you stood on the ground or raised up?

[nitrokillah]

I too thought that With All the new 2.4 ghtz I wouldn'd have anymore troubles .

though the glitches still appear from time to time .
both on my spektrum & my friends Sanwa ...

Mounting the Arial in a longer tube solved problem ...

hopefully that is all you'll need to do to get rid of your troubles ...

[emtee]

Have you checked the condition of the aerial on the hand set?

I have both dx2 'n dx3 set ups and have never had a problem with glitches or distance... My rx's are 3100's, some with a long aerial wire and some with a short aerial wire and all perform A1...

[teambowen]

Hi guys.
Thanks for the feedback.

point 1 new aerials on both receivers.
point 2 yes nitro tracks are future than 25m away. Even if they weren't it's still a risk to use them with people watching even with a double safety fence.
point3 one rx just stop totally, the second goes mad on both thro and string.
point4 No i must admit i didn't put the antenna in the aerial tube, i pushed it threw the front tower hole. But this should not have effected the signal as the car was pointing towards the radio during testing.

point5 the rx batteries is charged and are lipo saddle packs and also a 7.2v in my nitro.

I just thunk the rx's are playing up but i thought i would ask if anyone had come up with something to resolve the problem.

Jamie

[burgie]

Originally Posted by teambowen

....
point4 No i must admit i didn't put the antenna in the aerial tube, i pushed it threw the front tower hole. But this should not have effected the signal as the car was pointing towards the radio during testing.

I really wouldn't have thought that because the aerial was pointing towards the radio would make a difference, afterall how would it know where to look?

Put your aerials in a tube and stand them upright, that is how they should be really, and then see what happens.

[lenco12]

Originally Posted by Benh

I once sent mine across a field (curiosity) worked fine until I could drive it no further, about 100meters. Might be worth checking/ replacing the aerial. May have been pinched/ knicked and your rx distance dramatically reduced.

The SR3500 less fussy, just tucked the aerial in amongst the other wires and it would just keep going. As soon as moved to the SR3100, that would need to go into a tube and hang out the top exactly as per instructions, or it would do as you described at about the same distance.

Mine cuts out at about that distance, do we have any tracks which have 25m+ away from the rostrum?

Also, are you stood on the ground or raised up?

[MatJohnson]

But has it fixed the problem?

[teambowen]

No not yet as i'm at work lol,
I'm sure they'll be ok as they are replacements and have probably been tested.
If theres a problem then, i'm sure it will get resolved as quick as before.

I will check of them and get back to you all.
Good point.