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    Sea Commander.
    by Colin H ๐Ÿ‡ฌ๐Ÿ‡ง ( Commander)
    ๐Ÿ“ฃ










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    17 Posts 16 Replies 10 Photos 29 Likes
    ( Newest Posts Shown First )
    Nerys
    Lieutenant Commander
    ๐Ÿ“ Sea Commander.
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 9 seconds ago
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    Sorry I did not notice your pm. Have answered it now.

    Nerys
    1
    When the winds before the rain, soon you may make sail again, but when the rain's before the wind, tops'l sheets and halyards mind
    Colin H
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    Online: 23 hours ago
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    Thanks guys, but it looks like a new wiring job as some of the wiring has black wires instead of the nice shiny copper it should be, and I think it deserves a better motor, possibly a 600 as I have a few spare, and esc control. Also as it only needs 2 channels I will fit it with a new rx that will work with my tx's. But will stick to my vintage stock so could be 40mhz.
    So this one gets put aside till my old sea commander gets finished.
    But I will box up all the equipment ready to fit.
    Cheers Colin. ๐Ÿคž
    1
    Fair winds and calm waters, COLIN.
    RNinMunich
    Fleet Admiral
    ๐Ÿ“ Sea Commander.
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    "The forward/reverse switch seems to be a similar system to the one I used in my Gato Submarine."
    Yep! A two microswitch version of JB's (?) servo operated DPST switch.๐Ÿ‘
    (Double Pole, Single Throw) or DPDoubleT if you want OFF in the middle.
    ๐Ÿ˜Ž
    2
    Young at heart - slightly older in other places ๐Ÿ˜‰ Cheers Doug
    RNinMunich
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    Exactamente Dodgy ๐Ÿ‘
    Martin is also correct.
    Point 2 was discussed a few days ago in a similar thread.
    The earth wire should be soldered or clamped to the prop tube of earth plate though.
    A loose connection like a croc clip can itself be a source of interference; so called "Metal to metal noise". That's also why I don't like all metal UJs for the prop shaft.

    Even 1:1 ships can suffer from problems with earthing plates!
    In the mid nineties I designed a COMMS system for a series of glass fibre minesweepers.
    Against my better judgement the yard decide to use vertical whip antennae for the HF radios.
    A vertical monopole whip antenna needs a good earth to act as it's counterpoise.
    "No problem " said the yard "We'll let a copper earth plate into the keel."
    After launching and a few weeks of fitting out and trials they complained that the HF comm efficiency and range was deteriorating. We tested all our radios, ATU and cabling and all was OK.
    Then we sent a diver down to inspect the earth plate.
    He came up and said "It looks like Chantilly lace!"
    Red faces at the yard and they coughed up for the Crossed Dipole antenna (with it's own built in counterpoise and ATU) which I wanted to fit in the first place ๐Ÿ˜‰
    Cheers, Doug ๐Ÿ˜Ž
    2
    Young at heart - slightly older in other places ๐Ÿ˜‰ Cheers Doug
    DodgyGeezer
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    1 - MacGregor radios had a non-industry-standard IF. So you may have problems sourcing a suitable pair of crystals.

    2 - Having a single Earth point was a standard interference suppression requirement. This used to be provided by connecting the negative side of the circuit to a plate in contact with the water, or, for convenience, the prop tube...
    3
    Colin H
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    It's possible Martin. Or if wired in parallel for longer run time. Each battery pack is 6 volts. I'll have a look in the morning.
    Cheers Colin.
    1
    Fair winds and calm waters, COLIN.
    Martin555
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    The third battery might be for full speed ?
    I.e. Half speed/full speed system.
    Martin555.
    1
    If it looks right it probably is.
    Colin H
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    That's a good idea, I'll have to have a look. As there are 3 battery packs to connect, 1 to the motor switching system. 1 to the rx and not sure where the 3rd goes yet.
    Cheers Colin.
    1
    Fair winds and calm waters, COLIN.
    Martin555
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    Perhaps the crocodile clip connects directly to the battery , and all negative connections are taken from a central point.

    Martin555.
    1
    If it looks right it probably is.
    Colin H
    Commander
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    Online: 23 hours ago
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    Yes Martin, sounds right, but I've never seen it wired in this way with a crocodile clip. I usually have a capacitor in the circuit and hard wired.
    Cheers Colin.
    1
    Fair winds and calm waters, COLIN.
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