Bob Archer NAV/GS antenna, splitter needed?

Juan Pablo · #1 07-13-2017, 08:15 AM

Hi everybody, I am installing an Garmin GNC 255 with an Dynon Skyview HDX in my RV-8. I installed a Bob Archer antenna in the left wingtip. My question is: I need an splitter to give GS signal to the GNC 255?? When I put the antenna cable to NAV position in the 255, I have NAV signal but no GS. When I put the antenna cable to the GS position, I don't have NAV reception.
Thanks

rv7charlie · #2 07-13-2017, 08:24 AM

If the radio has separate nav & g/s antenna inputs, you need either two separate antennas, or a splitter configured to separate the nav & g/s frequencies.

(Some radios have that splitter built into the radio; some don't.)

Auburntsts · #3 07-13-2017, 08:30 AM

Huh? Doesn't the 255 only have a single Nav antenna input? How are you moving it from Nav to GS? According to the 255 Install manual for a single antenna, single GNC no splitter is required. If you tune in a LOC freq and there's a valid GS signal it should display appropriately.

GalinHdz · #4 07-15-2017, 07:42 PM

Quote:

Originally Posted by Juan Pablo

Hi everybody, I am installing an Garmin GNC 255 with an Dynon Skyview HDX in my RV-8. I installed a Bob Archer antenna in the left wingtip. My question is: I need an splitter to give GS signal to the GNC 255?? When I put the antenna cable to NAV position in the 255, I have NAV signal but no GS. When I put the antenna cable to the GS position, I don't have NAV reception.
Thanks

I am not sure what you mean by: "When I put the antenna cable to NAV position in the 255, I have NAV signal but no GS. When I put the antenna cable to the GS position, I don't have NAV reception."

Are you talking about the antenna (BNC) connections on the rear of the unit?

If so, you only have one for the NAV (receive only) antenna while the other is for the COMM (transmit & receive) antenna. You have to have both connected (separate antennas) in order for the unit to work properly.

GNC 255 Installation Manual - Appendix D-6 (Single GTR/GNC Installation)

Jesse · #5 07-15-2017, 07:53 PM

I believe this has been adequately answered in the other thread, but the splitter needs to be removed.