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Other › Best Receiver for the TRex?
10-06-2005 01:00 PM  12 years agoPost 1
GaryB

rrApprentice

Kansas

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...my son's having major interference problems with the Hitec Electron Receiver - he tried the ferrite core RF choke suggested here and it helped but didn't solve the problem...

...i've noticed the Futaba Micro PCM comes highly recommended here but Tower lists the range at under 1,000 ft. - has anyone tried the FMA dual conversion micro receivers? - are they a good choice for interference-free operation?...

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10-06-2005 02:46 PM  12 years agoPost 2
darkmask

rrNovice

Chesapeake, VA

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have you tried to move parts around... post pics of your current config.

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10-06-2005 02:57 PM  12 years agoPost 3
BANDANA

rrVeteran

Rochelle, Illinois

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What about a 148 or 149DP? Are they too big for the application?

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10-06-2005 04:20 PM  12 years agoPost 4
JiggerInc

rrApprentice

Arlington, VA

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Just a word of warning.. changing the receiver might not make the glitches go away, especially if they're coming from the ESC, motor, a notchy bearing or the area where you fly. Replacing the receiver with a PCM version will cover up occasional glitches by detecting that they're not a valid command, and just using a previously sent valid command... until you get enough glitches that it doesn't get a valid command for a full second. Then the PCM receiver goes to its lockout condition, which you've hopefully set for 0 throttle, and it just falls out of the sky.

Might be worth working on component placement, and checking all your bearings for smooth operation before buying a new receiver. You also might want to check the seating of the crystal in the Electron 6. I fly an electron 6 in mine, and now that I have the electronics positioned where I know I'm not getting any glitches, I'll probably put a Futaba 146i PCM in its place.

Good luck!

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10-06-2005 05:43 PM  12 years agoPost 5
Tmaster

rrKey Veteran

TX

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JiggerInc is right, changing the rx might not do it. I went through 3 different RX's before I realized the esc was the problem and it wasn't placement either. I changed the esc and all my problems went away. Transimitters are made to work well and right with the receivers, But if you getting noise from the esc or motor they wont be. You can try a ferrite ring on the esc wire.

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10-06-2005 07:17 PM  12 years agoPost 6
KevinR

rrVeteran

Vancouver, BC Canada

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i've noticed the Futaba Micro PCM comes highly recommended here but Tower lists the range at under 1,000 ft.
You can see your T-Rex when it's 900ft away from you. Do you fly with binoculars strapped to your head

I use the Futaba 146iP and have had my T-Rex far enough away I had to guess which way it was going to get it back Rx still worked fine.

Switched it back into my Mini Funtana plank which I can see much better and have had that far enough out that it was a spec without any problems.

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10-06-2005 07:57 PM  12 years agoPost 7
Tmaster

rrKey Veteran

TX

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I use the polks seeker 6 too, its ausome! I run a the Eclipse 7 with the spectra. So i can use any channel from 11 to 60 YeAH!!!

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10-07-2005 12:50 AM  12 years agoPost 8
Heliplane

rrApprentice

Topeka, KS

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Glitchy Trex

Here are a couple of pics of my installation. I am now using a Futaba full size FM receiver and still same problem. I am to the point that I think this is a bearing or some other mechanical problem. The helicopter shakes like crazy especially when you get on the pitch but it doesn't totally go crazy. I just throttle it back and set it down. Any ideas on radio install or other possible problems would be appreciated.

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10-07-2005 12:56 AM  12 years agoPost 9
Tmaster

rrKey Veteran

TX

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all i can say is move the RX or the ESC too the nose above the lipo. Make a attaching plate. Otherwise get a Berg RX or dtich the CC35.

GL

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10-07-2005 01:01 AM  12 years agoPost 10
drdot

rrElite Veteran

So. California,​Orange County.

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fwiw..

I use Electrons in all my electrics...Rx no problem, but major tail wag caused by emi is...Route all esc wiring away from any others, and keep esc as far from gyro and rx as possible...
Makes a HUGE difference!
JOhn.

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10-07-2005 01:06 AM  12 years agoPost 11
nojohnny101

rrElite Veteran

10 miles north of​Cincy, OHIO

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hey
don't mean to hijack...but does it matter if you put like your reciever or your esc near the battery

does the battery cause any problems or can you pretty much put anything by it and be safe????

Thanks
~Will~

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10-07-2005 02:22 AM  12 years agoPost 12
drdot

rrElite Veteran

So. California,​Orange County.

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fwiw..

Conventinal wisdom says battery is much like a capacitor...Tends to damp RF....I'm going to try to keep batt and esc forward, rx to the rear with gyro spaced as far away as possible...esc by batt will be no problem.

JOhn.

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10-07-2005 02:39 AM  12 years agoPost 13
Heliplane

rrApprentice

Topeka, KS

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I'm going to try moving ESC by the battery. Will post the results and let you know if it helps.

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10-07-2005 03:14 AM  12 years agoPost 14
wsilvio

rrNovice

Boston, MA

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Heliplane,

Try moving your gyro cable to the other side away from the reciever. I was told that you can get interference if it's too close to the receiver.

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10-07-2005 03:17 AM  12 years agoPost 15
TMoore

rrMaster

Cookeville, TN

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Here is a SC FM 6 channel RX from ATX. So far it has worked perfectly. ATX shortened the antenna and retuned it so that I didn't have a yard of wire out the back of the heli.

A JR TX will work this RX just like the ATX TX.

TM

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10-07-2005 03:28 AM  12 years agoPost 16
averen

rrVeteran

Austin, TX

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You also might consider using a ferrite ring between the ESC and RX. You can pick them up at most electronic stores. Just wrap wire around the ring a couple of times and that should help out with your glitches.

Knowledge is Power, Power Corrupts, Study Hard...Be EVIL!

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10-07-2005 03:52 AM  12 years agoPost 17
Heliplane

rrApprentice

Topeka, KS

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Thanx for all of the suggestions. I have tried them all and it is still the same result. I don't know where to go from here. I am beginning to wonder if I may have a bad ESC. The helicopter will come back to normal after returning to zero pitch. I reprogrammed the ESC so there is no over voltage cutoff and that didn't seem to help. I am beginning to think that the shaking that I am seeing is simply due to loss of head speed that is being caused by either a bad ESC, motor, or battery. Any other suggestions??

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10-07-2005 04:25 AM  12 years agoPost 18
upperking

rrApprentice

Spring Hill, Florida

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i have two helis that twitch when im flying sometimes enough to drop a foot

I wonder if its my cellphone in my pocket or some thing else in my neighborhood,, because i dont get it when i fly other places..
Make sure your CC is set to fast start to recover quickly from a twitch,,

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10-07-2005 05:06 AM  12 years agoPost 19
GoRgOyL

rrNovice

Miami, Florida

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Had the same twitch problem too with an Electron - 6, it is most freequent when the heli is on the extreme left/right side of the TX, not to mention the infrequent 'coughing' the motor does when setting up at the workbench. Changed it to a Futaba micro PCM and it all went away. I even used the antenna wire spool that came with the electron to shorten the antenna by half and flew the heli till I can barely make out it's orientation, didn't miss a beat.

Rod

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10-07-2005 05:10 AM  12 years agoPost 20
Shoo

rrApprentice

Eastern MA

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HeliPlane, check to see if your spindle is bent. Take one blade off and spin the spindle with a wrench, if the blade grips rise and fall replace the spindle.

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