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    by garyp ๐Ÿ‡ฌ๐Ÿ‡ง ( Leading Seaman)
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    12 Posts 11 Replies 4 Photos 9 Likes
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    RNinMunich
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    Copy that Gary๐Ÿ‘
    Looking forward to your Build Blog on the refurb of Michelle.
    (The boat I mean - not the Missus๐Ÿ˜ฎ)
    Carry on Leader!
    Bon chance, Doug๐Ÿ˜Ž
    1
    Young at heart ๐Ÿ˜‰ Slightly older in other places.๐Ÿ˜Š Cheers Doug
    garyp
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    Thanks once again .The existing serial seems to be superglued in place so is unmovable...hence the new aerial....Will let you know how I get on.
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    Gary Pressman
    RNinMunich
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    Hi Gary,
    Yep, should be.
    Most manufacturers use a compromise length, covering between 27 and 40MHz.
    So also covering the 35 MHz model aircraft band. It's cheaper (๐Ÿ™„) and simplifies their supply logistics. Difference in range for a boat would be negligible.
    Just connect the full length of the new antenna to your red socket and it should shift the resonant frequency a tad closer to 27MHz anyway. No need to open the RX and mess with soldering๐Ÿ˜‰ Personally I would use a gold plated connector (bullet) to avoid potential corrosion problems.
    Cheers, Doug ๐Ÿ˜Ž
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    Young at heart ๐Ÿ˜‰ Slightly older in other places.๐Ÿ˜Š Cheers Doug
    garyp
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    Hi Doug. I have ordered a aerial from a shop which seems much easier to fit and connect, However it says to use on 27 Mhz or 40 Mhz... My transmitter crystal says 26,99 Mhz. Is this OK to use?
    Gary Pressman
    RNinMunich
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    Hi Gary,
    The white bit should just be a tube with the antenna wire inside.
    So with luck you can carefully pull some of the wire down a bit until you can attach the plug easily.
    Good luck๐Ÿคž
    Doug ๐Ÿ˜Ž
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    Young at heart ๐Ÿ˜‰ Slightly older in other places.๐Ÿ˜Š Cheers Doug
    garyp
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    Yep,,will do..the white aerial is very short inside the cavity and my banana fingers are going to struggle to attach the socket and join the wire from receiver but persevere I shall...
    1
    Gary Pressman
    RNinMunich
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    Glad to help Gary.
    Please don't forget to report back how you get on๐Ÿ‘
    A vid of the test run would be nice!
    Don't forget to do a range check on shore before you get carried away๐Ÿ˜
    Cheers, Doug ๐Ÿ˜Ž
    Young at heart ๐Ÿ˜‰ Slightly older in other places.๐Ÿ˜Š Cheers Doug
    garyp
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    Wow.thanks so much I shall defo do what you said.......Thank you.
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    Gary Pressman
    RNinMunich
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    BINGO! The penny has dropped Gary ๐Ÿ‘ I thought I could see some black wire poking out of the white tube. Put the red plug on that and connect to the socket and all should be well ๐Ÿ˜€
    The black wire coming out of the RX at the opposite end to the servo sockets IS your antenna.
    I think the builder has done exactly what I did when fitting a 40MHz antenna to my U25 sub.
    To make life easier if he needed to remove the RX for any reason he fitted the plug & socket in the antenna wire. Just as I did when leading my sub antenna out of the watertight hull and up to the removable deck.

    How long is the 'white' tube coming through the deck?
    At 27MHz the typical 1/8 wavelength RX antenna is 54". The so called electrical length.
    Half or so of that is usually in a tightly wound so called loading coil inside the RX case.
    So the total physical length of the antenna 'outside the box' should be around 27".
    But please not all tangled up inside the boat with other wires and certainly not below the waterline. Keep the antenna wire as far away as possible from the motor and battery wires.
    AM receivers are especially susceptible to interference from electric motors!!

    Spent 40 years working in radio communications development and system design, mostly for cellular radio and naval ships. So I have some idea about antennas๐Ÿ˜‰
    Hope this gets you up and running, and your 'dignal' improves and your cold gets better๐Ÿ˜
    BTW; your RX is part of a Sanwa Saber RC set, Similar to my 35MHz 6ch Sanwa Conquest.
    Cheers, Doug ๐Ÿ˜Ž
    Young at heart ๐Ÿ˜‰ Slightly older in other places.๐Ÿ˜Š Cheers Doug
    garyp
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    The external aerial white is not connected to anything there is a red male plug knocking about the cavity .The receiver has a red female plug connected ..I wonder if they need to be connected??
    1
    Gary Pressman
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