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Another Garmin antennae problem.

RV8iator

Well Known Member
Benefactor
We’re stumped. GRT Sport SX with Garmin 400W with the classic antennae failure that takes out all the little puck antennae's with it.
Now the problem. We turned the 400 off and internal GRT gps with puck was inop. Also the GRTMini with separate GPS worked until we repowered the 400 confirming to us the 400 antennae as out problem. That makes sense. What doesn’t is that with the 400 turned off AND it’s antennae physically disconnected the GRT gps is still not putting out reliable data and we get dead reconing on the sport. We have switched the source to internal gps. Could the Garmin WWAS antennae have damaged those around it?
Stumped..
 
We’re stumped. GRT Sport SX with Garmin 400W with the classic antennae failure that takes out all the little puck antennae's with it.
Now the problem. We turned the 400 off and internal GRT gps with puck was inop. Also the GRTMini with separate GPS worked until we repowered the 400 confirming to us the 400 antennae as out problem. That makes sense. What doesn’t is that with the 400 turned off AND it’s antennae physically disconnected the GRT gps is still not putting out reliable data and we get dead reconing on the sport. We have switched the source to internal gps. Could the Garmin WWAS antennae have damaged those around it?
Stumped..
It could have. Can you try a different GRT GPS puck to see if that works?

:cool:
 
As you know, the failure mode of the Garmin antenna is that its internal electronics start radiating a signal, that overwhelms the gps signal in nearby antennas. Now if that signal is strong enough it might actually damage some electronics, but honestly I think that’s unlikely. But it might cause some circuit to hang up. Did you recycle the grt power?
 
As you know, the failure mode of the Garmin antenna is that its internal electronics start radiating a signal, that overwhelms the gps signal in nearby antennas. Now if that signal is strong enough it might actually damage some electronics, but honestly I think that’s unlikely. But it might cause some circuit to hang up. Did you recycle the grt power?

We did. Shut everything down and replicated it on a second leg.
 
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