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Old 08-10-2016, 12:17 AM
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CB Antenna mount question.

So I got all my CB equipment ordered from right radios, however I have a piece of aluminum angle stock and was wondering if I can use that for my antenna mount?

Any reason why it wouldn't work? Tire Mount is a Rugged Ridge.

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Old 08-10-2016, 08:58 AM   #2
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I don't see why you can't, since there are aluminum mounts available on the market.

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Old 08-10-2016, 11:29 AM   #3
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mine is aluminum and attaches to the same area (stock carrier) but it uses two bolts. It works great.
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Old 08-10-2016, 11:40 AM   #4
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Yes, aluminum is a good material for an antenna mount. However, the aluminum mount must be very well grounded for the antenna to work as well as is possible. It is best to have a bare metal-to-metal contact between what the mount is bolted to. If you have to ground it via a wire, use a braided ground strap and not just a standard piece of wire. RF grounds for antenna mounts are far more demanding than a normal ground connection can provide.
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Old 08-10-2016, 01:59 PM
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Quote:
Originally Posted by Jerry Bransford View Post
Yes, aluminum is a good material for an antenna mount. However, the aluminum mount must be very well grounded for the antenna to work as well as is possible. It is best to have a bare metal-to-metal contact between what the mount is bolted to. If you have to ground it via a wire, use a braided ground strap and not just a standard piece of wire. RF grounds for antenna mounts are far more demanding than a normal ground connection can provide.
I painted the front of the mount and left the back side bare. I'll sand down a small area on the tire carrier so the back side of the mount will touch the bare area of the carrier. That should be enough for a ground? I might even see if I can find a large ground (star) washer and put between the mount and carrier so it will dig in a bit on both sides.
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Old 08-10-2016, 02:23 PM   #6
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I would not place a star washer between the mount and tire carrier. Make sure the tire carrier is well grounded too so the mount gets its required ground via it.

The bottom side of the mount where the lower half of the antenna mount touches has to be bare metal too, as in the below illustration. THe "SO-239 Coax Connector" must touch bare metal all the way around it at the bottom of the mounting bracket. If there is paint inside the mounting bracket's hole, leave that as the paint will provide a little more insulation away from the mount's threaded part that passes through it.

One last hint, make sure the white nylon insulated shoulder washer, as shown in the below illustration, is installed and is in the correct location. That is what prevents the antenna from shorting to ground via the mounting bracket. And make sure the antenna mounting hole in the bracket is large enough for the shoulder of the washer to seat into... that means it will be a little larger in diameter than the part of the antenna mount that passes through the hole in the bracket is.

The last guy I helped figure out an antenna problem had drilled that hole too small which caused the antenna mount to touch the bracket and thus short the antenna to ground. The insulated shoulder washer was installed but it was smashed and not able to insulate anything because the hole diameter was too small.
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Old 08-10-2016, 02:33 PM
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Awesome. Thanks a lot Jerry for that info. I believe the mounting hole for the antenna adapter is 1/2"?
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Old 08-11-2016, 05:03 PM
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Quote:
Originally Posted by Jerry Bransford View Post
I would not place a star washer between the mount and tire carrier. Make sure the tire carrier is well grounded too so the mount gets its required ground via it.

The bottom side of the mount where the lower half of the antenna mount touches has to be bare metal too, as in the below illustration. THe "SO-239 Coax Connector" must touch bare metal all the way around it at the bottom of the mounting bracket. If there is paint inside the mounting bracket's hole, leave that as the paint will provide a little more insulation away from the mount's threaded part that passes through it.

One last hint, make sure the white nylon insulated shoulder washer, as shown in the below illustration, is installed and is in the correct location. That is what prevents the antenna from shorting to ground via the mounting bracket. And make sure the antenna mounting hole in the bracket is large enough for the shoulder of the washer to seat into... that means it will be a little larger in diameter than the part of the antenna mount that passes through the hole in the bracket is.

The last guy I helped figure out an antenna problem had drilled that hole too small which caused the antenna mount to touch the bracket and thus short the antenna to ground. The insulated shoulder washer was installed but it was smashed and not able to insulate anything because the hole diameter was too small.
Hey Jerry, one more question. I'm installing a CB mount over the rear view mirror for my 520XL. I want to remove the radio when not in use, am I able to use a disconnect terminal for both power and ground wires?

I Was thinking of grounding right above the mirror by the footman loop, then running power down to the positive battery terminal. Then both ends of the wire (from cb and battery sides) will have a male connector on one side and female connector on the other, when I remove the CB I can just unplug each wire.

Would this be OK?
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Old 08-12-2016, 08:48 AM   #9
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You can use a disconnect terminal for both wires. I like Anderson Power Poles, but there are plenty of other plugs available.

Don't use the footman loop for the ground. Run two wires down to the battery. Don't forget to fuse the positive right at the battery.
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Old 08-12-2016, 12:26 PM   #10
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I like using inexpensive trailer electrical connectors for CBs like this one. You cut it in the middle to make connectors for both sides. Wire it so the hot wire that connects to the battery goes to the female side of the Jeep side connector. Even my local Lowes carries this style of connector if you don't have a trailer or RV supply store nearby.

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Old 08-12-2016, 02:44 PM
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Quote:
Originally Posted by Jerry Bransford View Post
I like using inexpensive trailer electrical connectors for CBs like this one. You cut it in the middle to make connectors for both sides. Wire it so the hot wire that connects to the battery goes to the female side of the Jeep side connector. Even my local Lowes carries this style of connector if you don't have a trailer or RV supply store nearby.




Ahhhh very nice, just what I was looking for. I will check Lowes and see what they got.
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Old 08-12-2016, 03:11 PM   #12
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Not to hijack the thread, but some of us are finally getting some CBs. Jerry, I know you have a TJ. Where is the best place to mount the radio in your opinion? Thanks.


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Old 08-12-2016, 07:07 PM   #13
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Not to hijack the thread, but some of us are finally getting some CBs. Jerry, I know you have a TJ. Where is the best place to mount the radio in your opinion? Thanks.
It's hard to beat mounting it over the mirror, Arizona Rocky Road has a very nice mount that doesn't require drilling holes. It' also hides the wiring inside the channel so it's pretty slick. It's strong enough to support both my 2m ham and CB radios without any flex or bounce.

ARIZONA ROCKY ROAD ANTENNA MOUNTS FOR JEEP WRANGLER, UNLIMITED AND LIBERTY

My CB ended up there in two different TJs so it really works well and is out of the way. A nice add-on would be an automatic spring-loaded mic retractor like truckers use. Pull the mic out to use it, it retracts when you're done.

Like this... https://www.amazon.com/GearKeeper-Au.../dp/B00361UOTM but I just looped the cord around the rear mic button so it didn't have all that excess cord length. I siliconed the retractor to the top of the Rock Road mount, it works great there.

The second photo shows my first temporary CB mount which actually worked very well. I liked that the speaker was close to my ears.
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Old 08-13-2016, 12:28 AM
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Thanks Jerry, that double pin connector worked great. Lopped off the wire behind the cb using the male power pin on the cb side. Got the coax and power ran so far, will finish pulling cable thru the roll bar tomorrow. When the cb is removed all I'll have showing will be the overhead mount (once installed) as the wires are pretty well hidden.
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