I may be on to something....

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  • kfxguy
    Fast Electric Addict!
    • Oct 2013
    • 8746
    #1

    I may be on to something....

    I've been having some glitch issues and short range issues. ...only in my full carbon boats. Spektrum system (hush you Futaba guys! Lol) i ran the secondary antenna down the hatch rail and taped it. It was still inside of the hatch tho. Made no difference from being just shoved into an empty space (yea being lazy, I know) by the transom. So....I decided to run the antenna outside the boat. I did not want to drill another hole so I very carefully ran it in the same tube as the long one. I did have to get a little creative getting the other wire in there tho. I squeezed the tube a little to make it oval. In one of my antenna holders the tube still fit when I shaped the tube back to round. Another one was too tight so I had to drill it just a tad bigger. This did the trick. I had no more glitch in and the boat went farther from me than it ever has. Just throwing this out there for you full carbon hull guys with the dual antenna spektrum.

    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was
    Tags: None
    • srislash
      Not there yet
      • Mar 2011
      • 7673
      #2
      On Spektrums site they say optimum is having antennas 30degrees apart. Meaning if one is pointed straight up the other should be on a 30 degree angle from it. Just give another plane for the radio wave to hit. I was wanting to do this on my Fantasm but my tube is way to hard to get to. I didn't know that two put together would be of benefit.

      Is this the same Rx as was in the other CF boats?

        Comment

        • kfxguy
          Fast Electric Addict!
          • Oct 2013
          • 8746
          #3
          Originally posted by srislash
          On Spektrums site they say optimum is having antennas 30degrees apart. Meaning if one is pointed straight up the other should be on a 30 degree angle from it. Just give another plane for the radio wave to hit. I was wanting to do this on my Fantasm but my tube is way to hard to get to. I didn't know that two put together would be of benefit.

          Is this the same Rx as was in the other CF boats?
          I've had issues with every receiver and every boat. I honestly think the signal is being completely blocked on the antenna inside the hull and it being run with the other antenna probably isn't optimum, it's better than being blocked totally. This receiver has been moved around btw. I will do this to my mini and go run it this weekend. I know for sure it had a short range.

          Now that I think about it, on the maiden run of my rivercat (the same boat I did this mod too and it now reaches farther) i just remembered about 200 ft out I had to raise the transmitter higher to get it to come back to me. I went farther than than if you watched my most recent (but sucky) vid's of my rivercat.
          32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

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            • kfxguy
              Fast Electric Addict!
              • Oct 2013
              • 8746
              #4
              UPDATE:

              I ran a known constant offender today. I ran the wire out the hull like shown above. It NEVER cut out. Not once. It went much farther than it ever has before. As a matter of fact, something that is worth mentioning. I ran a fiberglass hull boat today (impulse 31) and it would cut out about the same distance my other boat used to. My other boat (carbon fiber mini rivercat) would go much farther than the impulse 31. Both running the same model esc. I honestly do think I'm on to something with this. It's shown me on more than one occasion that running the secondary antenna out the hull an inch or two most definitely helps. I am going to run the second antenna out the hull of the impulse before I run it again.
              32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

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                • srislash
                  Not there yet
                  • Mar 2011
                  • 7673
                  #5
                  So Travis, I am curious as to your surrounding area and what is bouncing around the airwaves. Any radio/cell towers nearby? I have not had one issue with any of mine(Spektrum) ever around these parts. I always run one antenna clear of the hull(some straight up and some layed back).
                  The 2.4 will bounce around channels to keep on a good link as I understand them. What voltage are you running them on? I run on 6v but they can do 9volt.

                  There is no doubt you are onto something here and it is definitely an easy remedy.

                    Comment

                    • dontrinko
                      Member
                      • Jun 2014
                      • 85
                      #6
                      I know for Helicopters people with carbon fiber body's have to somehow get the antenna outside of the body. Don

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                        • Darin Jordan
                          Fast Electric Addict!
                          • Apr 2007
                          • 8335
                          #7
                          On my all carbon N1 Mono, I run two antenna tubes to do the same. Both just go straight up though. Seems to work fine. I've never tried the boat another way so I don't know how it would have worked otherwise.
                          Darin E. Jordan - Renton, WA
                          "Self-proclaimed skill-less leader in the hobby."

                            Comment

                            • kfxguy
                              Fast Electric Addict!
                              • Oct 2013
                              • 8746
                              #8
                              Originally posted by srislash
                              So Travis, I am curious as to your surrounding area and what is bouncing around the airwaves. Any radio/cell towers nearby? I have not had one issue with any of mine(Spektrum) ever around these parts. I always run one antenna clear of the hull(some straight up and some layed back).
                              The 2.4 will bounce around channels to keep on a good link as I understand them. What voltage are you running them on? I run on 6v but they can do 9volt.

                              There is no doubt you are onto something here and it is definitely an easy remedy.
                              I never paid attention to see if there are any towels around. It does happen at two different places tho. Actually three now because my impulse 31 did it too. I have a separate receiver for every boat. I usually run the receiver voltage as high as I can depending on what is allowed in the esc or ubec
                              32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

                                Comment

                                • kfxguy
                                  Fast Electric Addict!
                                  • Oct 2013
                                  • 8746
                                  #9
                                  Update.

                                  I wanted to update my experience on this. Since I've run both the antenna outside of the boat, I have no more issues. So far I can go far enough with my 32" cat to almost not be able to see it so this trick really worked for me. Hope this helps someone.
                                  32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

                                    Comment

                                    • ReddyWatts
                                      Fast Electric Addict!
                                      • Apr 2007
                                      • 1711
                                      #10
                                      The 30 degree separation of antennas gives diversity to the receiver which helps with 180 degree signal cancelation. Not sure how it much it actually helps in a moving boat.
                                      ReddyWatts fleet photo
                                      M1 Supercat - Neu 1527 1Y, 8s / Mean Machine- Feigao 580, 8s, 120 HV esc
                                      Mean Machine - Feigao 540 14XL, 8s, 100 amp HV esc, X537/3

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                                        • kfxguy
                                          Fast Electric Addict!
                                          • Oct 2013
                                          • 8746
                                          #11
                                          Originally posted by ReddyWatts
                                          The 30 degree separation of antennas gives diversity to the receiver which helps with 180 degree signal cancelation. Not sure how it much it actually helps in a moving boat.
                                          not sure if all that matters in a carbon hull. I know for a fact it had issues not going far before i ran both out the hull.
                                          32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

                                            Comment

                                            • Minimac27
                                              Junior Member
                                              • Jul 2014
                                              • 3
                                              #12
                                              Since I run Spectrum and just ordered a Zonda, I think I'll do this before it even hits the water

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