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geofrancis


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Latest topics

» WW2 mini sub build
F-14 Robbe tx helical aerial EmptyTue Sep 19, 2023 6:57 pm by Tom(ADMIN)

» Not the hobby I expected :)
F-14 Robbe tx helical aerial EmptySun Sep 17, 2023 7:03 pm by cat

» Robbe Seawolf V2
F-14 Robbe tx helical aerial EmptyTue Sep 12, 2023 7:52 pm by geofrancis

» 27Mhz - Radio Ideas
F-14 Robbe tx helical aerial EmptyMon Sep 04, 2023 11:46 am by david f

» BEC - Switch mode
F-14 Robbe tx helical aerial EmptyMon Sep 04, 2023 11:31 am by david f

» Nautilus II by Robert Fulton
F-14 Robbe tx helical aerial EmptyMon Sep 04, 2023 11:23 am by david f

» Too soon for this?
F-14 Robbe tx helical aerial EmptyFri Sep 01, 2023 8:50 am by geofrancis

» ExpressLRS - 868/915 Mhz equipment
F-14 Robbe tx helical aerial EmptyTue Aug 29, 2023 8:32 pm by tsenecal

» Pinger 4 - A simpler design for an ultrasonic Pinger which gives an accurate 1 second pulse.
F-14 Robbe tx helical aerial EmptyTue Aug 29, 2023 12:16 pm by david f

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    F-14 Robbe tx helical aerial

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    Tom(ADMIN)
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    F-14 Robbe tx helical aerial Empty F-14 Robbe tx helical aerial

    Post  Tom(ADMIN) Wed Feb 01, 2012 9:55 am

    Ever since I've had my F-14 tx I've cursed that huge great telescopic aerial sticking out of the case. I've replaced it once after I caught it in a friend's coat and bent it out of shape, so after seeing Ramesh's F-16 with a much shorter helical aerial, I decided to try one out.

    Ramesh did confirm that he'd never noticed any loss of range with the short aerial, as yet I haven't had a chance to use it outdoors, but I've just done a range check by taking the Neptune downstairs out on the rear lawn, and with me upstairs operating the tx, everything worked fine on the sub.

    It feels much better than having all that tubing sticking out the front of the tx case...expensive though at £39.52 (that figure does include £2.50 postage)



    F-14 Robbe tx helical aerial 01022010


    I bought mine through Westbourne Models in Dorset. Here's the link : Aerial and scroll down to the very last item on the page.
    david f
    david f
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    F-14 Robbe tx helical aerial Empty Re: F-14 Robbe tx helical aerial

    Post  david f Wed Feb 01, 2012 1:14 pm

    I think that Ramesh uses a swimming pool a lot i.e short range.

    If you operate in larger bodies of water you may need the full length.

    (I do occasionally lose contact on the pond at Barrow so I don't intend to go that way.)

    And also we "Long Wave" users (along with the 27Mhz boys) can stand proud with our big aerials!
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    Tom(ADMIN)
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    F-14 Robbe tx helical aerial Empty Re: F-14 Robbe tx helical aerial

    Post  Tom(ADMIN) Wed Feb 01, 2012 1:31 pm

    Agreed David...as the part of our local lake that we are allowed to use isn't much bigger than a swimming pool, I think I'll be alright with the helical aerial. More so if I go walkies with the sub, and the exercise will be good for me as well...

    Remember the old saying..."it's not the length that matters, it's where you point it..."

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    ajg141
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    F-14 Robbe tx helical aerial Empty Re: F-14 Robbe tx helical aerial

    Post  ajg141 Wed Feb 01, 2012 6:15 pm

    Just remember to keep the nut inside the Tx tight Richard. I used the helical aerial for a while and kept losing range. Eventually I traced the problem to the loose connection.

    Andrew
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    Tom(ADMIN)
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    F-14 Robbe tx helical aerial Empty Re: F-14 Robbe tx helical aerial

    Post  Tom(ADMIN) Wed Feb 01, 2012 6:50 pm

    Funny you should say that Andrew...I did give the tx a 'shake' test, and found that it did come loose, so I smeared a thin coat of Loctite over the thread before finally tightening it all up.

    So far it seems to work fine, as soon the weather improves a touch I can go out and test it on the lake.

      Current date/time is Sat Sep 23, 2023 10:19 pm