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Home✈️Aircraft🚁Helicoptere-SABOther › Reciever (satelites) on Goblins
08-15-2013 02:27 AM  7 years ago
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gologo

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Sedalia, Mo USA

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Reciever (satelites) on Goblins
Don't know if this has been covered before, did not find it.......

With all the carbon fuselage of the Goblins (specifically 700), can you
use standard Spectrum sats w. no issue, or have any of you been running
those with no issues?

Will be running a pair w. the mini V-bar and already have those satellites.
But now see they have carbon versions available. Just wanting to know if
I can run what I have or need to go to the carbon versions? Thanks!
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08-15-2013 07:31 AM  7 years ago
Craigdieslemac

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Valdosta, Ga USA

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I have been using standard sats on my carbon frame. I just make sure the antenna's don't come in contact with it .. A couple pieces of strategically place black electrical tape is what I used.Aut viam inveniam aut faciam
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08-15-2013 04:28 PM  7 years ago
rexxigpilot

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I use regular DSMX sats on my Goblin 700. You will need to clear the CF frame with the active antenna with any RX or satellite antenna. The active antenna is on the left. See pics.

Ideally, I should have more clearance from my BEC, but it seems to work fine.
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08-15-2013 04:51 PM  7 years ago
SynergyAero

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Stuart, Florida - USA

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I use standard DSMX sats too, and attach them more or less like Rexxigpilot. However what I do to keep the leads from contacting the frame, is I cover them with about 8-10 pieces of heatshrink. The first piece is very small diameter, and just fits over the antenna lead. Every 2nd or 3rd layer, I up the diameter of the heatshrink one size. When I get to the last few layers, I also cover the plastic nubs, from where the wire protrudes, thereby keeping the leads sticking straight out at 90 degrees. By the time I have 8-10 pieces or more, the antennas are little semi-rigid black masts, much like a mini version of whats on your radio transmitter.

The real reason I do this though, is that I am somewhat OCD and cannot stand the little antena leads getting bent up!
Cris Trebbi
SynergyAero
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08-15-2013 06:12 PM  7 years ago
gologo

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Sedalia, Mo USA

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Thanks guys! Those pics are a great guide. Knew I did not want to hide
them up under the canopy, so that looks much more exposed for the
antenna leads.

Yeah, I have covered my leads w. very small dia. fuel line...works good
and seems to stay put, fits snug on the base of the wire.
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08-18-2013 07:34 PM  7 years ago
Luvmyhelis

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Spokane, Washington. USA

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On my 770 I run my rear sat out on the underside of the boom. Then the other is located up on the LH side of the rear frame. Separation is the key here! You don't want your sats close to each other at all. Spektrum states you want the sats as far away from each other as possible for signal diversity.

On my 700, one is located on the LH forward skid strut and the other is on the rear LH skid strut. I may also move that one back on the underside of the boom also. The reason I didn't is that the Skookum Gps is seated on the RH side of the boom about a third of the way back and I didn't want any RF interference.
Old cranky heli builder
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09-11-2013 02:25 AM  7 years ago
gologo

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Sedalia, Mo USA

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Well, need a bit more advice. Installed the sats basically identical to
Rexxingpilot. Went out late last week to maiden and did the 30 paces
(90 feet) range check for the DX7 (JR version) and all controls worked
fine even out a bit farther. But the motor wants to start up, and w. a
buddy helping, the lights are going out, blinking, losing signal.

It is an intermittent thing, but no fly until this is resolved.

Any tips, or have any of you had this happen?
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09-11-2013 04:50 AM  7 years ago
psylence519

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Omaha, NE - USA

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My sats are identical to Rexxing's, works great.

A few things, the left antenna (facing the satellite label-up, cable-down) is the one that needs to be in free air. Could try re-binding, intermittent connections can sometimes be improved by that.

The motor wanting to start up is disconcerting, have you set ESC throttle endpoints?
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09-11-2013 05:21 AM  7 years ago
gologo

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Sedalia, Mo USA

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Yeah, both have the left one in free air like Rexxing's. I did wonder if
I should rebind, have not done that again yet. And yeah, endpoints are
good, and this was happening w. T/H on. When I folded over the tip of the
Tx antenna to 45 and especially 90 degrees, it DID help and would stop
spinning up, but even then when I would wave the tx around I could still
get the motor to glitch up sporadically.

Of course, when I released the bind button, the motor would stop and all
lights would go back solid, but..............
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09-11-2013 03:35 PM  7 years ago
rexxigpilot

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Rebind and it should work fine.
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09-11-2013 05:15 PM  7 years ago
Mike Wilson

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Toronto, Canada

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Sounds like your throttle failsafe is not set correctly. You should always rebind after you have completed your throttle setup to ensure that you have the correct throttle failsafe recorded.Teambob00
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09-11-2013 05:20 PM  7 years ago
rocket_33

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Mount Pleasant, Michigan USA

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The active antenna is on the left.
the left antenna (facing the satellite label-up, cable-down) is the one that needs to be in free air.
Out of curiosity where is this shown? If this is the case, what is the right lead for? This is something new to me and I don't recall seeing this before so just wanted to learn more information
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09-11-2013 05:34 PM  7 years ago
Craigdieslemac

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Valdosta, Ga USA

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here is what my sats look like on my Goblin 700, they are contrary to conventional wisdom, but I have never lost signal... my 550x has one on top.. right in front of the tail boom, and one on the bottom, that one never loses signal either.

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09-11-2013 10:06 PM  7 years ago
psylence519

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Omaha, NE - USA

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Out of curiosity where is this shown? If this is the case, what is the right lead for? This is something new to me and I don't recall seeing this before so just wanted to learn more information
Depends on how much info you want, here's something akin to a firehose:

http://www.archeli.com.au/forums/sh...857#post1300857
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09-11-2013 10:11 PM  7 years ago
psylence519

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Omaha, NE - USA

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When I folded over the tip of the
Tx antenna to 45 and especially 90 degrees, it DID help and would stop
spinning up, but even then when I would wave the tx around I could still
get the motor to glitch up sporadically.
Wait, did you have the antenna pointed directly at the heli, like a laser? That's not how it should be pointed.

Watch at YouTube

Skip to around the 5:00 mark. If this isn't what you meant, then disregard.
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09-12-2013 01:00 AM  7 years ago
gologo

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Sedalia, Mo USA

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Psylence, NOT disregarding........ The video and article were great info
especially the satellite info. I have heard about not pointing the Tx
ant. straight at the receiver of course, but not about the specktrums
having a 'active lead', as Rexxing was referring to. Have ran this same
setup (mini V w twin sats) on two other helis, plastic framed though,
and have never had glitch/signal issues.

The carbon goblin is bringing out a new learning curve for me I guess.

Anyway thanks to all of you, will rebind and see what happens!
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09-12-2013 05:23 AM  7 years ago
rocket_33

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Mount Pleasant, Michigan USA

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Thank you for the article. I did not know that and in the years I don't recall ever seeing this pointed out in the videos Horizon have regarding antenna placement. They speak of angles but not active versus ground side. I think this would be important to point out as well so thank you
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09-12-2013 06:03 AM  7 years ago
psylence519

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Omaha, NE - USA

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I think this would be important to point out as well so thank you.
I agree! It's pretty dumb that the active side isn't bright orange or something to show its importance...
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09-16-2013 12:21 AM  7 years ago
gologo

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Sedalia, Mo USA

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Well, a rebind seemed to take care of it, no motor movement at all. Also
moved a power wire a few more millimeters away from one sat., if that had
anything to do w. it.

Goblin even made its first funfly yesterday and did great! Looks like I am
good to go, and thank you guys all again for the ideas, advice and info!!
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