Hi David,
We have the Skymap IIIC, and had our antenna located at the top of the
instrument panel, above the radio equipment. During the build phase I
tested the GPS to make sure the antenna was happy looking up thru the
top of the panel, and it was.
During the test phase the GPS operation was intermittent, with marginal
reception (weak signal strength). We moved the antenna, first just
sitting on top of the panel, where it still had problems (even with the
radio/xponder off). We finally relocated the GPS antenna into the
overhead console area, where it has been fine since. Note that it is
still inside the cockpit, looking up thru the top of the fuselage. For
some reason it does not like being located just above the contents of
the instrument panel (worked fine when there was nothing else in the panel).
regards,
Terry Seaver
A135 / N135TD
Davidghillam@aol.com wrote:
>
>My Bendix/King Skymap II is built into the panel. It works perfectly (I
>think) until the radio is switched on, then gives the message "No fix
>possible".
>The 'Status' screen then shows no signal from the satellites.
>
>Because the panel/electrics are the only parts of the plane I did not build
>myself, I am not sure of the aerial position, but I believe it is adjacent to
>or on top of the radio stack. People who know more about these things than
>I say that shouldn't be a problem, but I am not so sure.
>
>I was thinking of removing the panel (not my favourite way of spending the
>day) and moving the aerial to another location but before I do that does anyone
> have any other suggestions for the cause of the problem, (eg wiring fault)
>or any other investigations that I should do while it is out?
>
>Thanks in advance.
>
>David Hillam
>G-SHSH
>Classic 912
>30 hours
>
>
>
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