Question about Motorola MJ270R Talkabout 2-Way Radios with 27-Mile Range
I recently bought these and have them set up on same channels and frequencys. i can not get no range from these things fully charged walk out the door leave for work which by birds flight 1-1.5 miles from my house. there are some trees but nothing thick no hills that would block signal i am aware of these possibilites of being the probem. these radios i have just have no range and are supposed to have UP TO 27. i know ill never get that but they can do way better than they are now. is there a certain channel and freq that will help boost range or some kind of trick to these ??? how can i get better range than >1 mile girlfriend couldnt even hear me it was just static.
Handheld radios talking line-of-sight with no obstacles will communicate approx. 2 miles. When talking from inside a building to outside, you can expect 1/4 to 1/2 miles range. Holding the antenna perpendicular to the ground gives you the best range. Height and placement of the antenna determines range. If you were on a mountain you could talk many miles into the valley below. However, in real world applications, range is limited. It can even be limited by the body fluid of the person wearing the radio on their hip, or blocked somewhat by the metal of the automobile one is riding in.
Channels 18-22 are listed as GMRS channels and may have more power than 1-17. The FRS channels are limited to 1/2 watt. But don't be fooled wattage doesn't equal distance. Higher wattage may give you a little more distance, but mostly it will give you clarity in the fringe areas.
Here is a link to the user guide: http://www.motorola.com/web/Business/Products/ConsumerTwo-WayRadios/Talkabout-MJ270R-Two-Way-Radio/_Documents/MJ270.pdf
A link to Motorola's page about the radio: http://www.motorola.com/Business/US-EN/Business+Product+and+Services/Two-Way+Radios+-+Consumers/MJ270R_Talkabout_Two-Way-Radio_B2B_US-EN
And I see where they are quoting 27 miles*, and go on to say:
*How far can I expect my radios to communicate? The communication range quoted is calculated under optimum conditions, with an unobstructed line of sight. Actual range will vary depending on terrain and conditions, and is often less than the maximum possible. Your actual range will be limited by several factors including, but not limited to, terrain, weather conditions, electromagnetic interference and obstructions.
Unfortunately, we are seldom in idea conditions. Radio-to-radio is going to get you 1/4 mile to 2 miles in real conditions.
Posted on Feb 25, 2013
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Posted on Jan 02, 2017
SOURCE: AXU4100 Manual or help
On a Motorola AXU Series (including the 4100):
1. To unlock, press the “D” button for about a second or until the circle is gone. The circle with the line thru is the keyboard lock indicator;
2. To change channel, you need to press either the arrow left or right in Normal Mode;
3. To change PL (assigned to a channel), don’t think this can be done by the user
4. To change Ch. 1 from 464.500 MHz (PL-67.0) to 463.525 (PL-136.5), don’t think this can also be done by the user.
Even the built-in Programming Mode Parameters do not have this option to change assigned frequencies and PLs. An external programming software using a PC may or may not allow this.
These radios came pre-loaded with its channels assigned with specific frequencies/PLs. As used in a Motorola AXU411, they are:
Channel Frequency PL
1 464.500 67.0
2 464.500 77.0
3 464.500 88.5
4 464.500 179.9
5 464.500 None
6 464.550 67.0
7 464.550 82.5
8 464.550 94.8
9 464.550 179.9
10 464.550 None
Hope this be of help/idea. Pls post back how things turned out or should you need additional information.
Good luck and kind regards.
Posted on Dec 24, 2007
When having the radio programmed indicate to the programmer which channels you would like to have in a specific scan group. They an at that time set up a particular group for you.
Posted on Jun 26, 2008
Unfortunately the T5728 is not compatible with the US FRS (family radio service) frequencies. The T5728 operates between 409-410MHz. The FRS radios operate between 460-470 MHz. FRS frequencies are license-free frequencies for use in the US, as regulated by the FCC. Other countries have differing rules and thus their frequencies assigned to family usage differ.
Posted on Apr 09, 2009
check this link at page 21 or see below
CTCSS PRIVACY CODES FREQUENCY CHART (Hz) Code Freq. Code Freq. Code Freq. Code Freq. Code Freq. 1 67.0 9 91.5 17 118.8 25 156.7 33 210.7 2 71.9 10 94.8 18 123.0 26 162.2 34 218.1 3 74.4 11 97.4 19 127.3 27 167.9 35 225.7 4 77.0 12 100.0 20 131.8 28 173.8 36 233.6 5 79.7 13 103.5 21 136.5 29 179.9 37 241.8 6 82.5 14 107.2 22 141.3 30 186.2 38 250.3 7 85.4 15 110.9 23 146.2 31 192.8 8 88.5 16 114.8 24 151.4 32 203.5 * Channel 8,9 and 10 are designated Canadian Marine Frequencies * Channels 8~14 are low-power FRS license free channels Note: Privacy codes can be programmed for use on Channels 1~22 only
Posted on Feb 04, 2010
Testimonial: "Thanks for the response. appreciated it. It is very useful."
Hello, I just purchased 3 of the discontinued XU2100 radio's, Can someone help me to change the frequency on them? My email address is firstname.lastname@example.org. Thank u for your time...
Posted on Feb 22, 2011
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