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 Post subject: Vehicle antennas
PostPosted: Sun Mar 20, 2016 10:46 pm 
The New Guy

Joined: Mon Jul 21, 2014 3:45 am
Posts: 39
Location: Finland
So basically all the information (links n stuff) is welcome. I have very little information about vehicle type of solutions and how they work. I am using mostly frequencies around 430 and above, with handheld 5W transmitter. I am mostly interested about the antenna types and where to mount them to get best results. The car where the antenna is going to be mounted is pickup style so there is double cabin in the front and quite big open bed on the back.

Also where I can find good quality antennas for rough use (off-road). If any old military antennas could do the job quite well its always a plus, since the car is not nice and shiny either :roll:

The terrain will be mostly dense forest with little height differences.

At the moment we are using handheld radio with normal stock antenna in vehicle and same radio on dismounted troops with longer whip antenna. And we would like to get more reliable communication between the vehicle and dismounted troops.


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 Post subject: Re: Vehicle antennas
PostPosted: Fri Mar 25, 2016 5:48 am 
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What do you mean with stock antenna, rubber duckies? If so you will lose a lot of power, especially if you start transmitting from within a vehicle. A rubber duckie with 5W will probably only emit about 1 W. Furthermore if you place an antenna in the back of a vehicle it (the antenna) will become a directional antenna (sort like a yaki antenna), and thus will lead to a lesser reCeption from the back or sides. Best is to have a mobile radio in your vehicle with an antenna which is the right length for the frequency you use, or otherwise have an antenna adjuster between the transiever and the antenna, so you can tune it, and install the antenna close to the center of the vehicle. Maybe you should look online for good antennas for the 70cm band (420. - 450MHz).

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 Post subject: Re: Vehicle antennas
PostPosted: Fri Mar 25, 2016 11:11 am 
The New Guy

Joined: Mon Jul 21, 2014 3:45 am
Posts: 39
Location: Finland
Ya we got one of these in our handheld radio inside the car and indeed it transmit pretty bad since its inside big "tin can". What comes to mounting the new antenna, I cant mount it in middle of the roof since there is a gun mount just behind it. And since I've hear its not good either to mount it to any corner of the vehicle I came up with an idea to install the vehicle antenna in the gun mount (the ring that rotates 360 degrees) which is basically almost in the middle if we take into account the total length of the vehicle. Then I would make there shitty repeater station which our driver could listen with that rubber duckie antenna.

And what comes to actual antennas, I have not found any good vehicle antennas with the spring mount. I have been in contact with one manufacturer, but since they are focused on military and LE sales only I have bad feeling about this.


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 Post subject: Re: Vehicle antennas
PostPosted: Thu Apr 07, 2016 10:05 pm 
The New Guy

Joined: Mon Jul 21, 2014 3:45 am
Posts: 39
Location: Finland
Well the manufacturer of those MIL/LE antennas I mentioned before responded back to me, but those antennas are super pricey and they don't include even VAT :roll: All I can also say is that I am not surprised at all. I just thought they would have been just half thousand cheaper :lol:

The price is not never a insurmountable problem, the problems is that do I need antenna that cost around 300% more than the radio I am using with it at the moment :mrgreen: So I am still looking for good (but not that good :roll: ) vehicle antennas while trying to balance between the question do I buy that MIL/LE antenna or not. One thing which also matters a lot in investments over 50€ is that how well they keep their price over a time. I believe that kind of antenna would keep its price pretty good even in hard use. Also I would know it will survive basically in any kind of environment.


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 Post subject: Re: Vehicle antennas
PostPosted: Wed Apr 20, 2016 3:29 pm 
The New Guy

Joined: Mon Jul 21, 2014 3:45 am
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Location: Finland
Can some admin please delete those viagra pharmacy spam messages from messing up my topic, and swing ban hammer a little...


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