Our local highway patrol seems to put all their antennas as close to each other, on the same ground plane. It's almost as if they're trying to use a phased array 😆

Great information

And yet simplex gateways are limited to 5w ERP!! I don't understand that.

I call but nobody answers the phone!!

What is the beat low profile GMRS car antenna? Everyone on youtube I see uses the “ghost” antenna.

Thank you for this tutorial. I want two scanners in my SUV so this is a receiving only question. Can I have the same type of antennas for both radios or do I have to follow the same guidelines that you talk about for receive and transmit? Also, do mag mounts cause more interference vs ones that get installed through the roof?

Will the SVR 200 Pass P25 Simplex?

Which of your antennas will work for gmrs since i live in the middle of the woods thanks!!

Random question. All the emergency services agencies in my county have pretty much the same install, and without being able to post a picture, I’ll try to explain it. They all use UHF for P25 and VHF analog, so only 2 antennas. The Ford Police Utility example is the most common, but the method makes me scratch my head about the ground plane. They have the UHF 1/4 wave mounted dead center of the roof, and the VHF 1/4 wave straight behind it about 4 feet apart. But the VHF is also less than 1 foot from the factory AM/FM stereo antenna. Would it not make a better ground plane for each to have to VHF in the middle and the UHF toward the rear? Obviously the V needs a larger diameter ground plane than the U does. And they use the same method on crew cab F150s. UHF is dead center behind lightbar but VHF is at the rear of the cab just a couple inches from the third brake light. Wouldn’t that limit the V at the rear to only having a semi-circle ground plane toward the front half of the vehicle and none toward the rear? I’m no expert, but with my limited knowledge it doesn’t look right to me. 🤷🏻‍♂️

Great advice! A question. Does Pyramid make bandpass filters to deal with this issue? I ask because at one time as a radio ham I had a 2-meter system in my car and worked at USAF radar sites that had multiple megawatt radars operating. To protect the front end of my radio I placed a shorted quarter-wave coax stub at the antenna connector. That looked like at open at 2 meters and for any odd harmonic. It looked like a short for even harmonics and a partial short at other frequencies. It seems like similar bandpass filters could prevent some of this desensitization.

For a VHF SVR antenna, would the Phantom antenna be a better or same choice of antenna as the "soup can" (Mirage) antenna? I believe your point is to use a different type than the mobile antenna, however, I'm wondering about the differences of these two type of antennas.

Another question. Unlike quarter-wave antennas, half-wave antennas (with impedance matching) don't *need* a ground plane. One might be an answer to a 'where do I put in issue?' They could be put more places. But not needing a ground plane isn't the same as not benefiting from one to have a consistent, low-angle radiation pattern. Is the radiation pattern of a half-wave antenna influenced by the ground plane under it?

I was curious about having CB antenna and a scanner antenna on the roof of a pick up truck only about 10 inches apart. I was told there should be no issue transmitting on the CB and causing any problem to the scanner since the CB is only 4 watts and 12 watts on SSB. I've had it this way for many years and haven't noticed any problem with either radio. Any thoughts would be appreciated. Thank you.

What about fiberglass roofs