Unfortunately, the lower receive-only antenna may have nothing to
receive if the upper transmit-receive antenna is blocked by the fuselage
and does not ping the approaching aircraft behind/below.

On 6/13/2017 6:34 PM, waremark wrote:
In my Arcus I have the receive and transmit aerial where fitted by the factory on top of the rear glare shield, and the receive only aerial on the belly in front of the main wheel.

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Dan, 5J