Technical, Techniques, Hints, and Tips > Radio Equipment

Losing radio connection to boat

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ronnie42:
Had an issue yesterday, radio starts telling me that connection to RX is lost/on  at about 100m out . Think that i need to reposition the RX and support the aerial leads. Its a Radiomaster 16s and a Flysky RX. Must be interference from the electrics, as the aerial leads are hanging down, at shorter distances have no problems.

JimG:
As a simple check try rotating the aerial on the transmitter vertically upwards or downwards. The signal from the transmitter is basically polarised with in this case a horizontal polarisation. The receiver aerials are vertical so are not receiving the full strength of the signal. With these twin aerials it is best to have one vertical and one horizontal or both at 45 degrees with 90 degrees between them. this way at least one will in a better position relative to the transmitter. Also try and have the receiver aerials pointing upwards out of the hull.The actual receiver position should be OK, 2.4GHz sets are much less liable to being affected by other electronics than the older VHF sets.
Jim

barriew:
Remember its the tips of the aerials which are important. Get those above the water line and positioned as Jimg says. In your photo they are well below the water line.


Barrie

Steve Dean:
Hi Ronnie42,Some guidance for you ...... it is clear from the photo that your antennas are very poorly positioned. As has been pointed out, it is only the the last circa 35mm that is the actual antennas, most of the length is a screened cable. Reposition the receiver so that one antenna is vertical and the other either horizontal or at 45 degrees. The way you have the antennas positioned currently they are close to being below the waterline. This is why it works when close to the TX but fails at a distance. Also locate the receiver away from other electronics (i.e. motor, ESC, etc) and clear of other wiring.Hope this helpsSteve Dean.

ronnie42:
Drilled a couple of holes in the superstructure to pass the aerials through , they are above the waterline and further away from the ESCs thanks again.

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