Eric Greenwell wrote on 7/26/2017 8:18 PM:

I would not expect units intended for cars to the range to work well with a trailer.


.... intended for cars to HAVE the range ...

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Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf