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  • VHF Marine radio antenna / range ??

    How many of you fishing, carry a VHF radio? Realistically / real-world, do you know what you range is?

    I thought it be a good addition to carrying a cell for general communication, so I got a Standard Horizon HX870 GPS handheld. Like it a lot! It's stated to be 6 watts, so perhaps my expectations were a little too high when I wasn't even able to key-up the local SeaTow ARC tower at just two miles away. Line of site, radio was on High output, ch 27. The little rubber-ducky just isn't up to the task. Finally got the tower to respond at about 1.3 miles, yet in all fairness, I have no idea how sensitive (signal strength) the automated system triggers on, aka who knows . . . a real person with squelch all the way off might have still heard me at the 2 mile point. So "as-is", that makes this little handheld nothing more that $200 "voicebox saver", as it's just going to be useful enough to avoid hollering across the water to the nearby boats, or my buddy just over at the next spot. :P
    This is in no way a testament against the HX870, as it is a reality-check for handhelds in general. So, if you were like me and didn't know, I'm here to say that you are not going to get anywhere near the advertised range, not with that short little oem rubber duck antenna that is.

    So I'm looking into antenna options. Do I get a gotty 6ft + telescoping replacement for the handheld, or attach a base-mount antenna to the ski wired back to the handheld?? Doesn't have to be attached all the time. . . maybe stow the antenna inside the hull, which can be rigged-up whenever needed. My goal here is just to have something comparable to a cell phone as far as range goes. Mainly for non-emergency, yet urgent communications - although these radios do have a distress button. So back to my original question, what range are you getting on what?


    MR-1/1.8L 2005 "hull-swap", thru-hull exhaust with custom baffle-chamber, ribbon-delete, R&D Pro Comp filter, APE MCCT swap, Garmin 44dv w/ thru ride plate transducer, Candoo-speedo, YDS, ATV mid-height bars OID grips billet trigger, thermostat pisser mod, 1100GPH bilge pump, air-cooled mosfet reg/rec, switched dual LiFePO4 batteries, Pump seal kit, Solas, anti-cavi cone, siphon-delete, water-flag valve, stereo system, VHF radio, DYI fishing rack


  • #2
    Good info here:
    https://www.boatingmag.com/marine-vh...o-range#page-3

    https://www.intercomsonline.com/2-Wa...cate-s/136.htm

    Power output is often thought to increase range, but really, the difference in range between a 25-watt fixed marine VHF radio and a 5-watt handheld is due to the fixed mount's antenna being taller, and therefore it can ÔÇ£seeÔÇØ farther.
    Now: 2012 SeaDoo GTI 155 Limited

    Then: 2011 SeaDoo GTI SE 130, 2008 SeaDoo GTI SE 130 , 1994 Kawasaki SS Xi, 1989 Kawasaki ZX10, 1986 Yamaha Radian

    Comment


    • #3
      Yes, ÔÇ£seeing furtherÔÇØ is exactly what I'm saying above. I think the transceiver I have is plenty powerful. Having a hand-held is great for portability, but its also a shot in the foot on actual transmission-range with that dinky antenna.

      As a boat owner, this is an easy nut to crack . . . aka get a decent console radio in the dash, and mount a six to eight-footer to the gunwale. But being this is a ski, I need a more portable and scaled approach. I don't use the ski for strictly fishing, so a temporary rig is going to make the most sense for me.

      Click image for larger version

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      So I was thinking on purchasing a 3 foot Shakespeare stainless whip - the one that has the load-coil at the base - to hook up to the hand-held on an as-need basis. That should net me a decent half-wave. These are tried & proven antenna's. However, instead of mounting it to the ski, or even to my rear PVC fishing rack/basket - which is already removable . . . I could attach a short PVC section (like adding a handle) to the base of the antenna, so that I could insert this into any of my RAM rod-holders like I would a fishing pole.
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      That way, I could easily stow the antenna rig inside the hull, thus bust it out when I need something farther-seeing than that rubber ducky. Truth of the matter is that I don't always take that PVC rack, but usually always have one or two of them RAM mounts with me.


      MR-1/1.8L 2005 "hull-swap", thru-hull exhaust with custom baffle-chamber, ribbon-delete, R&D Pro Comp filter, APE MCCT swap, Garmin 44dv w/ thru ride plate transducer, Candoo-speedo, YDS, ATV mid-height bars OID grips billet trigger, thermostat pisser mod, 1100GPH bilge pump, air-cooled mosfet reg/rec, switched dual LiFePO4 batteries, Pump seal kit, Solas, anti-cavi cone, siphon-delete, water-flag valve, stereo system, VHF radio, DYI fishing rack

      Comment


      • #4
        These may also work:



        This one extends to 50"
        Now: 2012 SeaDoo GTI 155 Limited

        Then: 2011 SeaDoo GTI SE 130, 2008 SeaDoo GTI SE 130 , 1994 Kawasaki SS Xi, 1989 Kawasaki ZX10, 1986 Yamaha Radian

        Comment


        • #5
          I found if you can’t see the contact you won’t call them with a handheld....

          vhf is line of sight...... get your antenna as high as you can...... coast guard antennas are generally very high and can relay messages

          Comment


          • #6
            Stow-n-Go

            So I ended up purchasing a Shakespeare 5215 (Squatty Body). It's basically a wide-band half-wave 3ft VHF stainless steel whip marine antenna - fairly tried & proven for performance in a low-profile design. Now I could just jam it somewhere inside the hull as-is. But I did not want a metal whip just loose in the hull - might short something out - IDK, just didn't feel safe. Also did not want to risk damage to the antenna itself, considering some rides can get quite rough out in the seas. Solution: "Stow-n-Go" tube !

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            So I put together a PVC "STOW" tube for which I can invert and insert the antenna into when not using it. It also stores the SMA cable. Roughly a 3 ft 1 inch tube, it was just a matter of the right combo of PVC fittings, and to glue another separate fitting atop the load coil body (which permits a slip-fit when inverted into the stow tube). In "GO" configuration, the antenna is slipped-out of the stow tube and slip-fit back on to the tube, which then doubles as mast extension. The base of the tube has a union fitting with a bolt-peg. This acts as an adapter which fits snugly into any of my rod-holders.


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            Field-testing . . . . TBD.
            Weather got unfavorable lately, so I'll need to punt range-testing for another weekend it seems.


            MR-1/1.8L 2005 "hull-swap", thru-hull exhaust with custom baffle-chamber, ribbon-delete, R&D Pro Comp filter, APE MCCT swap, Garmin 44dv w/ thru ride plate transducer, Candoo-speedo, YDS, ATV mid-height bars OID grips billet trigger, thermostat pisser mod, 1100GPH bilge pump, air-cooled mosfet reg/rec, switched dual LiFePO4 batteries, Pump seal kit, Solas, anti-cavi cone, siphon-delete, water-flag valve, stereo system, VHF radio, DYI fishing rack

            Comment


            • #7
              How did the test go?

              Comment


              • #8
                I wished for better . . . yet the test went pretty good. With this external antenna rig, I was able to key-up the automated radio-check station just above 3.5 miles, which is roughly three-times the distance of the same test using the OEM rubber-ducky that came with the handheld. Now is 3.5 mi my max range?? I'd say "no", because the SeaTow's automated radio-check stations seem to only respond to moderate-to-crispy-clear key-ups (hence not to constantly activate off of background noise and/or stray signals). So, if we consider normal radio receivers with either none-to-light squelch settings, I'd say it's safe to say my realistic range is likely in the 4 - 6 mile reach. And likely a little further for the sensitive Emergency Distress broadcast.
                If I ever run into someone else with a decent radio, I should attempt a squelch-less max distance test.


                MR-1/1.8L 2005 "hull-swap", thru-hull exhaust with custom baffle-chamber, ribbon-delete, R&D Pro Comp filter, APE MCCT swap, Garmin 44dv w/ thru ride plate transducer, Candoo-speedo, YDS, ATV mid-height bars OID grips billet trigger, thermostat pisser mod, 1100GPH bilge pump, air-cooled mosfet reg/rec, switched dual LiFePO4 batteries, Pump seal kit, Solas, anti-cavi cone, siphon-delete, water-flag valve, stereo system, VHF radio, DYI fishing rack

                Comment


                • #9
                  Originally posted by TimeBandit View Post
                  Yes, ÔÇ£seeing furtherÔÇØ is exactly what I'm saying above. I think the transceiver I have is plenty powerful. Having a hand-held is great for portability, but its also a shot in the foot on actual transmission-range with that dinky antenna.

                  As a boat owner, this is an easy nut to crack . . . aka get a decent console radio in the dash, and mount a six to eight-footer to the gunwale. But being this is a ski, I need a more portable and scaled approach. I don't use the ski for strictly fishing, so a temporary rig is going to make the most sense for me.

                  [ATTACH=CONFIG]428474[/ATTACH]
                  So I was thinking on purchasing a 3 foot Shakespeare stainless whip - the one that has the load-coil at the base - to hook up to the hand-held on an as-need basis. That should net me a decent half-wave. These are tried & proven antenna's. However, instead of mounting it to the ski, or even to my rear PVC fishing rack/basket - which is already removable . . . I could attach a short PVC section (like adding a handle) to the base of the antenna, so that I could insert this into any of my RAM rod-holders like I would a fishing pole.
                  [ATTACH=CONFIG]428473[/ATTACH]
                  That way, I could easily stow the antenna rig inside the hull, thus bust it out when I need something farther-seeing than that rubber ducky. Truth of the matter is that I don't always take that PVC rack, but usually always have one or two of them RAM mounts with me.
                  I fitted an ICOM-IC-M400BB with this whip antenna. Range seems to be great but I haven't measured it.

                  I find it a huge comfort to have a proper GPS/DSC enabled VHF on board. It & Nav lights should be standard or, at least, factory options.

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                  • #10
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                    ...folds down when not on use so cover may be fitted.

                    Comment


                    • #11
                      Originally posted by E.U. Premier View Post
                      I fitted an ICOM-IC-M400BB with this whip antenna. Range seems to be great but I haven’t measured it.

                      I find it a huge comfort to have a proper GPS/DSC enabled VHF on board. It & Nav lights should be standard or, at least, factory options.

                      [ATTACH]436415[/ATTACH][ATTACH]436416[/ATTACH][ATTACH]436417[/ATTACH][ATTACH]436418[/ATTACH][ATTACH]436419[/ATTACH]

                      What nav lights are you using ?

                      Thanks
                      2010 SeaDoo RXT-X 260 RS
                      2000 SeaDoo XP

                      Comment


                      • #12
                        My idea of the vhf (standard Horizon HX890 dsc) was that should I have ever got parted from ski and in the water the VHF was on my life jacket and I had emergency contact facilities. I dont see the point of bringing a phone and all the rest of it and leaving it on the ski. Lets face it if you are on the ski you are not in immenent danger, different story if you are in the water dazed, hurt and cant get back to ski.

                        Comment


                        • #13
                          Originally posted by Wild Thing View Post
                          My idea of the vhf (standard Horizon HX890 dsc) was that should I have ever got parted from ski and in the water the VHF was on my life jacket and I had emergency contact facilities. I dont see the point of bringing a phone and all the rest of it and leaving it on the ski. Lets face it if you are on the ski you are not in immenent danger, different story if you are in the water dazed, hurt and cant get back to ski.
                          Yes... Fine if you don't go in deeper than 2nm from the coast... But useless when you go out 20nm... Then you need a mobile (25W) unit... And an EPIRB...
                          2010 SeaDoo RXT-X 260 RS
                          2000 SeaDoo XP

                          Comment


                          • #14
                            Originally posted by SinWolf View Post
                            Yes... Fine if you don't go in deeper than 2nm from the coast... But useless when you go out 20nm... Then you need a mobile (25W) unit... And an EPIRB...
                            Well, I wish I would have found this sooner, as I just bought a Standard Horizon HX890...Due to life and local, I'm almost always out alone, in the ocean. If that only gets me +/- 2.5 miles, what would a good alternative be? Sat phone? If so, could anyone recommend a good one? I'd only use it in dire emergencies.
                            2022 FX SVHO

                            Comment


                            • #15
                              Originally posted by Highline9 View Post
                              - Standard Horizon HX890...Due to life and local, I'm almost always out alone, in the ocean. If that only gets me +/- 2.5 miles, what would a good alternative be? ...
                              Contact your local Coast Guard office. Ask them what range they can hear and talk to when the boater is using handheld VHF marine radio, and in what areas on the water.

                              In my region the Coast Guard radio towers are hugely tall and much higher powered than anything on recreational boat. They can hear from farther away and talk to people on the water at longer range than the distance you can reach another boat.

                              Some of the guys in Alaska mount larger whip style antenna on the PWC and use the higher powered 'mounted to the boat' VHF radios. The antenna base is still not that high above the water but the antenna length plus the higher power does give them more 'reach'.

                              This thread has some good info regarding longer range VHF radio install and limitations.
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