I haven't tried to change the antenna but I can tell you this for fact. Our Montana and Wildcat 5ers are stored side by side here at home during winter. The Montana with the hidden indoor antenna struggles to pick up a single station clearly. The Wildcat with a spring mounted roof car type antenna picks up dozens of crystal clear stations.
I would expect a huge improvement with the car antenna even mounted indoors.
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2019 Montana HC 310RE
2010 Wildcat 29RLBS
2014 Ford F-350 Lariat 6.7
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