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SAB Goblin 630/700/770 SAB Heli Division 630/700/770 - Goblin Helicopters Factory Support


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Old 07-21-2015, 12:42 PM   #1 (permalink)
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Join Date: Feb 2007
Default Goblin 700 carbon +JR 712BX signal seems weak

I just bought a JR28X together with the 712BX receiver. I set it up on my Goblin 700 carbon . while range testing it i plugged in the batts with the canopy on and kept it in all 4 orientations, i noticed the following:

1. the moment i would cross 30meters walking away from the heli signal would deteriorate. If I turned back signal would restore.

2. especially in nose in orientation signal would break off after 20m

I've mounted the receiver inside the canopy just below the locks on the right side with 1 wire running along the same frame facing down and the second wire taped under the boom crossing along the tail servo

Before this i was flying a futaba 14sg and i vividly remember during range test mode signal would be stronger overall...

Is there a weakness in the signal for the 712BX?If yes, do i need to use a satellite?
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Old 07-21-2015, 02:52 PM   #2 (permalink)
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Hi,
I found the the best place to position the antennas on JR and Futaba receivers is down the back of the rear skid. I mount the receiver low down inside the frames and fix the aerials in position using a spot of shoe goo or sticky tape.

This positions the aerials away from the carbon fibre and ensures they are nearly a perfect 90 degrees apart. I've tested this on all my helis and normally get bored after walking 50 or so meters.

Please bare in mind that your boom, canopy, and frames are all made from Carbon fibre, and, as such they will prove to be very good signal attenuators if you position your aerials in close proximity to them.
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