Don't know if I should start a new topic, but I tried using a magmount on top of my house's roof top air conditioner/heater. It's metal and about 3'x3'. I got a terrible match. Could it be because I attached 30 feet of RG8x to the 12 feet of RG58 coming off the antenna mount? Aren't they both 50ohms? do I need to use the same coax?
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