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AM/FM over 50 ohm coax?

Old 11-03-2018, 05:04 PM
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Join Date: Feb 2018
Location: Peoria, AZ
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Year: 2001
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Default AM/FM over 50 ohm coax?


I recently (as in today) installed my NMO through roof mount for my CB and am considering installing a second NMO mount to move the AM/FM antenna up to the roof as well (should improve the reception in mountain/canyons). This would also get it up so it's not getting smacked by brush/limbs (here in the desert, it's narrow areas with wide open overhead).

The NMO mount I used has 50 ohm coax, whereas AM/FM radio seems to use 75 ohm coax. Can/how well will AM/FM work over 50 ohm coax?

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Old 11-07-2018, 05:48 PM
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Location: Edmond, OK
Posts: 2,493
Year: 1993
Model: Cherokee
Engine: 4.0 ltr

You could get some RG-59 coax ($0.55 a foot @ USA Coax) and put an NMO at one end and a Motorola Connector on the other.
I would be surprised if you noticed that much difference using a 50 ohm coax for receiving AM/FM.
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