Re: Two-Way Radio Choice?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Boomholzer</div><div class="ubbcode-body">If your cost conscience, would suggest you check out a set of Kenwoods in the 150MHz MURS band.
I have 4 TK-2200V2P's. (2-Watt, MURS) I believe this particular model has been discontinued but you might even find them cheaper now. I think the 2300 is the replacement but not sure. I paid under $90 per radio.
I have tested these to over 5 miles NON line-of sight with woodlands inbetween. The battery life is also great.
I have taken one apart (im a RF engineer or design short-range radios) and they are very well built and well designed. A basic old-school discrete narrowband FM transceievr with great RX sensivity. The PCB is fully supported and thermally sinked to cast aluminum.
On the different frequency bands; The longer the wavelength or lower the frequency, the lower the path loss. For example, same RF power or "all-else-the-same"; a 150MHz MURS band radio will go 2x farther than a 470MHz GMRS radio (again at the same power, antenna gain, etc). A 915MHz ISM radio would have a range 3/5ths of the GMRS. A CB radio at 27MHz is almost 4x the range of MURS radio. The assumes same RX sensitivity, antenna gain, etc.... but is just noted if your not familiar with propagation characteristics in different radio bands. Higher frequencies will typically work alittle better indoors up to 900MHz. Also, the efficiency of a short helical antenna is increases as the frequency increases.
The MURS band is now unlicenced. There is not allot of traffic in this band.
4watts in the 450 - 490 Mhz range is also common. There are many other options.... 2 watts in the MURS band can still beat 4Watts at 470MHz. IMO what I described is the best performance for the buck.
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Boomholzer,
Help a dummy out here.
I have a couple of 10 year old Icom VHF radios (very expensive) and as soon as one of us drops over the far side of a mountain my partner and I lose communication.
We are usually within 3-5K (as the crow flies).
Is there any technology that does what I need?
Does the hardware listed above do that?
Thanks in advance!