Posted for "Angier M. Ames" <n4zq@comcast.net>:

 Just wondering how builders are grounding pin 9 on the 25 pin Dsub  connector
for a gear down indication on the display.
For example, does anyone know of a double pole version of our  traditional
gear switch?
 
 Angier Ames
 N4ZQ

[Seems to me the switches that give you your three greens are already sending grounds for those lights.  Assumiing your gear lights operate similarly you could pick up any one of those grounds to trigger your AOA gear down indicator.  Check your wirebook.   <Marv>    ]