Question about Motorola Talkabout T5500 (7 Channels) 2-Way Radio

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Modify a motorola T5500 to work in different frequency

Is there a way to modify the circuit of a MOTOROLA Talk About T5500 to make it work in a different frenquency. Trying to create "safe" and unique frequency avoiding interference by many similiar radios being used in the same area and just the modified pair can use this frequency safely in a noisy environment? without losing talk range?

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Sorry. The MHz of your radio cannot be changed. And there are no "private" frequencies available for use. However, your radio is equipped with this in mind.

There are 22 frequencies built into the T5500, along with 38 Interference Eliminator Codes. The two combined offer you over 836 choices to avoid other people. And if this is not sufficient, they also have the capability Qt filtering.

http://www.giantintl.com/ContentManage/manuals/Moto/T55xx.pdf

Page 19: Interference Eliminator Codes
Page 21-22: Qt Filter

Posted on Apr 17, 2009

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T5500 http://www.giantintl.com/ContentManage/manuals/Moto/T55xx.pdf

T5920 http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T59xx_User_Manual_E.pdf

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I have a pair of motorola t5500 one of them will not talk to the other . one works fine and you can talk into it and hear from the other but the 2nd one when I press the button and talk you hear nothing...


Change your CODE to be zero on the 2nd unit. Here is a link to the user guide: http://www.giantintl.com/ContentManage/manuals/Moto/T55xx.pdf

If this doesn't solve the problem, check the frequency, code and Qt filter to be certain they are all set the same. Lastly, switch the battery packs between the units and see if the problem moves to the other unit. It takes more energy to transmit than to receive.

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Assuming all settings are the same (as you say) and the units are within range of each other (typically less then a mile over clear, level terrain) they should work just fine.

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