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RC Radios, Transmitters, Receivers, Servos, gyros Discussion all about rc radios, transmitters, receivers, servos, etc.

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Old 04-27-2012, 07:51 PM   #1
Crasher
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Default 2.4g from 72mhz RX antenna on Aluminum Fuselage

Gentlemen; I want to swap my old 72mhz radio system that I have been using on my GWS SlowStick to a 2.4g radio system. My old SlowStick has a aluminum fuselage; for the 72mhz RX antenna, I run it from the RX to the verticle fin, it is long and it has worked great. But the antenna on the new 2.4g RX is short and I am a bit concerned on attaching it to close to the aluminum fuse. I wonder if I should make some kind of an alternate mounting for the RX so I can position the antenna further away from the aluminum fuse? Or, could I just tape it to the fuselage? In either case, I will ground test my installation before any flight. I am going to 2.4g so I can fly without concern of 72mhz interference from other guys at the field. Thanks guys, Crasher
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Old 04-28-2012, 02:38 AM   #2
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Which 2.4 rx are you using? Does it have one whisker or two?

I doubt it really matters all that much. Just be 100% sure the whiskers are NOT touching the frame and you should be fine. If it only has one whisker, Id mount the rx on the bottom so it can "see" the tx when in the air. Might help some if you put a small stand-off to hold the rx away from the frame a bit. Wouldnt take much though.

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Old 04-28-2012, 07:33 AM   #3
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I would keep the antenna away from the aluminum.

2.4 can be shielded from receiver antennas by batteries, speed controls and carbon fiber, about any thing conductive,

As Larry asked, what system are you using ? JR has RX's that have a shielded wire about 5" long, the last 30mm is the antenna. (where the shield is removed ) The long antennas are easy to place.

As a rule of thumb, there should be an antenna visible to the TX in any orientation of the plane.

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Old 04-28-2012, 04:04 PM   #4
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Thanks Larry and Wildflyer! My RX is a SkyFly model FS-R6b, 6 channel. The overall antenna length is a 5-1/2" long thin wire, with a 1" long, 3/16" diameter portion, 1" from the end. With this antenna being so short, I suppose that I could make a "fixture" on the SlowStick aluminum fuselage to hold it perpendicular or in a verticle position to be on the "safe" side. Again, I'll ground check my installation before flight. Crasher
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Old 04-28-2012, 04:38 PM   #5
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I would not worry too much especially on a slow stick. Install, range test, fly.
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Old 04-29-2012, 02:43 AM   #6
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Originally Posted by Crasher View Post
Thanks Larry and Wildflyer! My RX is a SkyFly model FS-R6b, 6 channel. The overall antenna length is a 5-1/2" long thin wire, with a 1" long, 3/16" diameter portion, 1" from the end. With this antenna being so short, I suppose that I could make a "fixture" on the SlowStick aluminum fuselage to hold it perpendicular or in a verticle position to be on the "safe" side. Again, I'll ground check my installation before flight. Crasher
Just to be on the safe side, you might also try to have the two antenna "Stubs" at right angles to each other.

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