AlexPeterson
Well Known Member
As another thread (http://www.vansairforce.com/community/showthread.php?t=22764) on TNC connectors has gotten into a lot of meat on the upgrades, I thought maybe we should start a new thread on some of the subleties.
I just pulled my 430 for the upgrade. The local avionics guy at KANE, who has done a lot of them, has a couple comments. One, the coax length does matter. I'm at around 9 feet, so we'll just have to test it. Second, the BNC/TNC adaptor is acceptable, in fact, it costs less than the TNC connector, so I plan to use it. Third, he is expecting trouble with ELT interference, since my ELT antenna is only about 2 feet away from the GPS antenna. This will be tested, but I think the basic issue is com energy coupling into the ELT and re-radiating back out in the form of trouble for the gps (I might not have this stated correctly, but it is about right).
I know that there are guys out there who simply have installed the WAAS units without all the proper testing. Be mindful that there is a lot more to it with the WAAS.
I just pulled my 430 for the upgrade. The local avionics guy at KANE, who has done a lot of them, has a couple comments. One, the coax length does matter. I'm at around 9 feet, so we'll just have to test it. Second, the BNC/TNC adaptor is acceptable, in fact, it costs less than the TNC connector, so I plan to use it. Third, he is expecting trouble with ELT interference, since my ELT antenna is only about 2 feet away from the GPS antenna. This will be tested, but I think the basic issue is com energy coupling into the ELT and re-radiating back out in the form of trouble for the gps (I might not have this stated correctly, but it is about right).
I know that there are guys out there who simply have installed the WAAS units without all the proper testing. Be mindful that there is a lot more to it with the WAAS.