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handheld/mobile connection?

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peter_x

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If I have a business radio in a vehicle, is there a handheld that would allow me to talk through it when I am a short distance from the vehicle? Would this be a bluetooth device? Thanks.
 

Kf4mnc

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Yes, such devices are available. Typically they are some sort of cross-band repeater type device that is of low wattage so they only carry a short distance.

I have seem some Ham Radio products use bluetooth, but few professional radios. Plus, bluetooth is typically only good for 30 feet max.

Here is an article on how it works: Crossband repeater systems and public safety interoperability

Here is a link to a discussion here on RR: http://forums.radioreference.com/radio-equipment-installation-forum/205229-vehicle-repeaters.html
 

mmckenna

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Bluetooth would be a good short range option, but like noted, 30 feet or less, not very useful in the real world. There are plug in adapters for most radios, hand held and mobile. Truth is, inside a vehicle it's going to be blocked by the metal.

A "mobile extender" is what you want. A lot of public safety agencies use them. Pyramid is the big manufacturer in this area. Motorola makes some also.
Pyramid Communications Home - Pyramid Communications Vehicular Repeater would be a good place to start.

There are two ways of doing this, in band and out of band. In band is when you use the same band for the hand held as you do the mobile. Out of band is when you us a different band for the mobile and the hand held. In band can be problematic as you need some separation between the frequencies to make it work right. Even then, without expensive filtering, desensing of the receiver can be an issue. Out of band usually works better and will be cheaper, maybe.

Licensing is the big issue. You will need to be licensed for all frequencies you use. There are not any legal ways to get around this. You will also want a hand held that works in a different frequency band than the mobile, if you want to do the out of band system.

It isn't cheap, either. The mobile repeaters can be a few hundred bucks. A few more hundred if you need to buy a new hand held in a different band. Installation, set up and programming isn't something for the hobbyist. If you want it to work right, you need to work with someone who has done these systems before.
 

peter_x

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Thanks for pointing me in the right direction. I read that there are three classes of bluetooth with the highest being capable of 100 feet. That would be adequate for me (plus I wouldn't need a license) but it sounds like that hardware might not exist. Looks like I will need a VHF/UHF radio. Thanks.

Sent from my Torque using Tapatalk
 

mmckenna

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There are so new ones out on the market. Saw one in a trade magazine the other day that claimed 100 feet. If I was at work I could probably see if I could find it.

The big trick is getting the bluetooth transmitter up in the clear, like on the dashboard or something. Having it buried under the dash with the radio will greatly reduce it's range.

Might not work as well, but have you looked at just installing an external speaker for your radio? The highway department here uses an external weatherproof speaker on the trucks. The Kenwood low band radios they use have a 13 watt PA amp built in. Still means you have to run for the microphone, but it might be a cheaper alternative, unless you are in a location where not everyone is going to want to hear your radio.
 

domes

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I was looking at a listing on Ebay for what I believed they called a wireless mic. The price was $99 and it looked like a mobile mic that clipped to your shirt. It had a transciever you sat on the dash and gave about 100ft range. You could order it with the cord that matched your brand radios mic jack, although I don't believe all mobiles provide Rx audio to the mic jack. You might look on ebay.
 

domes

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Go on Ebay search and type in "ZX cordless mic" and you will find them. They are shipped from China. The are 300/500mw and operate on 245MHz. I don't know if they are legal to use here. If you buy one to try, let us know how it works.
 

robertmac

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I would be very careful with anything in the 245 MHz area. If I am not wrong that is right in the Aeronautical band and even with 300/500 mw, line of sight is a great factor. I guess that is what is wrong with buying things from China as their band plan may be much different than North America.
 

mm

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I know this is an old thread but I'm curious as to how expensive they are?

A ball park figure would help me out. since I can't get a price from anyone who claims to have these available.

It seems they want to sell a boatload before they give pricing, they take your e-mail but never send me a real number for prices.

What good is product if I can't give pricing to the people who ok the purchases?

The public safety boating users is one area where these could come in handy.
 

ramal121

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You really need to have a use for X10DR mics, but they do work well. One vehicle got 2 mics, 2 charger/receiver cradles (with external antenna option), and 1 interface box that hooks to the mobile. For the system I wanna say around $900.
 
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