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 Post subject: Broadband Antenna on UHF frequencies?
PostPosted: Wed Jan 08, 2014 3:41 am 
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Quick question for you radio guys. Would a thales mbitr broadband antenna work on UHF freqencies such as gmrs and frs?


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Wed Jan 08, 2014 4:48 am 
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If it's the 30-512MHz model, absolutely. We had some old Motorola Astros or Sabers (I'm not up on vintage Motorola models) kicking around that we hooked MBITR antennas (both the issued ones and the wearable ones like the TVAS) up to with no problem. All we had to do was pick up some antenna adapters from the local radio store.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Wed Jan 08, 2014 6:00 am 
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Cheers. Thanks for the confirmation.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Fri Feb 27, 2015 7:56 pm 
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Not to dredge up a year old thread but this is in relation to the original topic.

I've got an ICOM F4/S radio that I'm trying to hook up a Thales broadband antenna to. I've tried searching for the right adapter to attach the antenna directly to the radio but have come up empty handed. Does anyone have a link to the correct adapter or can anyone provide me with the name/part number/etc. of said adapter? I tried my local Radio Shack but they were of no help.

Thanks in advance.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Fri Feb 27, 2015 8:20 pm 
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I do not know what kind of connector you have on your radio, but the Thales antenna needs a TNC connector to be pluged.

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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Fri Feb 27, 2015 10:31 pm 
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You need something like this:
http://www.ebay.com/itm/MX-BNC-Antenna- ... 4d130d45ff

Plus this:
http://www.ebay.com/itm/BNC-male-plug-t ... 4d2820120c

Basically, you're going from an MX (Motorola) standard to the TNC standard. Your radio is set up for an MX connection, but you need a TNC connection. MX->TNC adapters are very unusual to find, so the easier method is to use a BNC (quick disconnect) adapter in the middle. There shouldn't be any loss of signal strength, and this will allow you to use a cable routing adapter if you so choose, since most of the commercial ones are wired with a BNC adapter.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Fri Feb 27, 2015 11:57 pm 
The New Guy
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pkm you rock! I knew the connection for the Thales was TNC but for the life of me couldn't figure out the name of the connection on the ICOM. Only thing I found was info on ICOM's website about the F4/S and they called it a "J" connection which didn't bring up anything else on Google but ICOM's site. With this info it should definitely be easier to get the right parts once I track down an actual radio store in my area. Thanks man!


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Sat Feb 28, 2015 1:28 am 
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Sure thing! I only know because we had a lot of Sabers in the arms room without antennas that we needed a fix for.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Sun Mar 01, 2015 2:26 pm 
Quite OK actually
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You can get broadband antennas like that however they might not be as effective as say grs/gmrs that is tuned to operate on those frequencies.


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 Post subject: Re: Broadband Antenna on UHF frequencies?
PostPosted: Mon Mar 02, 2015 1:31 pm 
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Be careful with those adapters. If possible use an antenna extender cable between the adapter and antenna. Considering how rugged the TNC-connector is, you can easily put too much stress on the SMA-J and snap the connector from the body. Since the Icom antenna is dipole you can use a SMA-J to TNC adapter and reduce the bulk. Unless you need a QD mount.

Sabers and their antenna connectors are tough as nails, the Icom not so much.

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