Out of curiosity is it really necessary to sand the underside of the roof down to bare metal? Will you do it again on the new truck? I thought the NMO Mount teeth would dig into the roof an make any paint removal unnecessary.
I remember back in my 4x4 CB days the prevailing wisdom was that you need to establish an RF ground, so if you used a taillight mount on a Jeep for a CB antenna, you should sand the paint/powdercoat off the Jeep body and the back of the mount at least the size of a quarter and aligned so they make contact on a relatively large surface area. Or else your antenna won’t work so well. For those of us with little understanding of the principles at work it’s all voodoo and so we’ll do whatever we’re told.I've never done it and never had an issue.
I remember back in my 4x4 CB days the prevailing wisdom was that you need to establish an RF ground, so if you used a taillight mount on a Jeep for a CB antenna, you should sand the paint/powdercoat off the Jeep body and the back of the mount at least the size of a quarter and aligned so they make contact on a relatively large surface area. Or else your antenna won’t work so well. For those of us with little understanding of the principles at work it’s all voodoo and so we’ll do whatever we’re told.
The part of the NMO mount that goes under the sheet metal has teeth in it that will bit through into the metal.
Most of the cheep knock-off NMO mounts have very poor 'teeth' and are prone to bad ground connection.
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Another reason to avoid all Tram/Browning/Hammy/Hobby grade crap.Most of the cheep knock-off NMO mounts have very poor 'teeth' and are prone to bad ground connection.
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