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2011 Chevy Silverado Ideas

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madrabbitt

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i want to say around the center of the dome light. I'll look at mine tonight if you havent already found it. Dome light takes 5 seconds to pull though
 

Project25_MASTR

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Where is the roof cross bar? Just so I can imagine it

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I seem to remember it being just above with roughly 4 inches between the stamping and support. The support should be pretty much in line with the B pillars (leading edges of the suicide doors). It's been almost two years since I worked on an extended cab though.
 

mmckenna

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Okay, I'm about to start planning this whole project out. What are some ideas for the placement of the antennas? I'm planning on mounting 3 antennas (CB, 800Mhz, and a TBD one). Obviously I want the CB in the middle. What about the others?

CB in the middle since it needs a large ground plane. Ideally the ground plane for a CB antenna is going to be one quarter wavelength, or about 108 inches in all directional around the mount. Since you can't get that on your truck, you give it the most you can.

800MHz only needs 3 inches of ground plane in all directions around the antenna to work best. That's readily achievable by going above the center high mount stop light..

The "TBD" statement concerns me. What you use this antenna mount for really dictates what it needs. If it's for a receive antenna, it's not critical. If it's for transmitting, then we need to talk....
 

davidjacobs2012

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CB in the middle since it needs a large ground plane. Ideally the ground plane for a CB antenna is going to be one quarter wavelength, or about 108 inches in all directional around the mount. Since you can't get that on your truck, you give it the most you can.

800MHz only needs 3 inches of ground plane in all directions around the antenna to work best. That's readily achievable by going above the center high mount stop light..

The "TBD" statement concerns me. What you use this antenna mount for really dictates what it needs. If it's for a receive antenna, it's not critical. If it's for transmitting, then we need to talk....
I decided that the TBD antenna will most likely be another receive only antenna. Probably a dual band (VHF/UHF).

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mmckenna

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OK, shouldn't be an issue.

You do want to keep some space between all your antennas:
-Even with a 4 watt/12 watt CB, you can generate enough energy at the antenna to desensitize the receivers on the other radios. While it's not going to cause any damage, it might get annoying to have the receive audio drop out every time you transmit.
-Putting antennas too close together can change the radiation pattern. Again, probably not much of an issue for a CB.

But, just in case you ever decide to get your amateur radio license, GMRS, etc. making sure you give yourself about 19 inches between antennas would be a good choice.
 
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