Question about Motorola Talkabout T5720 (7 Channels) 2-Way Radio

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T8500 blinks off and back on often when transmitting

These radios have proven to be very unreliable. I have a set of three and two of them often will not transmit a signal. They blink off then right back on when you ptt. Is this a common issue and does anyone have a solution. If i can't fix the problem and need new radios, do you have a recomendation? I primarily use them for backcountry skiing and snowmobiling so I need reliable long range capabilty. Thanks

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It takes more energy to transmit than to receive. It is possible you have an old or defective battery pack, a bad connection to the battery, or your PTT button is not working properly. On this unit, the internal PTT button can begin to be bent further in from repeated use, or pressing too firmly.

As far as a more durable/reliable radio, you might want to look at radios in the business division such as the Motorola CP110, BPR40 or the CP150. These business level radios are built to work a 40+ hour work week, and are much more reliable than the consumer division products, which are intended for occasional usage.

Posted on Jan 18, 2009

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Apr 19, 2012 | Motorola T8500 Two Way Radio

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Cannot hear transmisions all the time. changed batteries to regular alkaline from pack to see if the battery were bad. this did not change the transmissions problem. need help.


You may have one of the following issues:

1) Programming of special features is inhibiting communications. Reprogram the radio(s) back to a basic mode with the special features, code and Qt filter (if any) turned off (zero). Then check to see if communications improves.

2) You could have a Transmit problem with the other radio. This could be caused by a bad or low battery or even a sticking PTT. Try trading the batteries with a known good radio and see if the problem changes or moves to the other radio.

3) Your radio could be failing. If you have changed the batteries to known good batteries, and tested the radio with more than one other radio, and you do not have a programming problem, you likely have a radio which is failing.

Here is a link to the user guide: http://www.giantintl.com/ContentManage/manuals/Moto/T8500%20English%20only%20June5.pdf

Best regards.

Sep 15, 2010 | Motorola T8500 Two Way Radio

2 Answers

Radio receives but will not transmit. Call button will also not transmit. The LED on good radio blinks once every two seconds. The Led on bad radio blinks once every three seconds. Do I trash the bad...


Here are a couple of things to try before trashing the unit:
1) Check your programming to see that your frequency, code and Qt filter (if any) match identically. For simple operation set your Qt filter and code to off (zero).
2) Swap the batteries between the two units, see if the problem moves to the other unit. If so, you have a bad battery pack.

Here is a link to the user guide: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T5320_T5410_T5420_User_Manual_E.pdf

Best regards.

Aug 11, 2010 | Motorola Talkabout T5420 (14 Channels)...

1 Answer

Two motorola t8550's unable to communicate


1) You did not mention the Qt filter. You might check to see if you have the Qt filter set the same on both radios. This is an additional layer of privacy featured on this radio.

2) Verify you have good working batteries. A bad battery or uncharged battery can cause a no transmit situation.

3) If these do not work, reset your radio back to a basic operation by shutting of the code, Qt filter, call tone, weather alert, Vox/iVox, roger beep, etc. At this point your radio would be operating just on a simple frequency. See if you can communicate with all these special features turned off. If so, slowly add back in the features you desire.

4) If your radios still fails to work and is less than one year old, call the 800 number on the pamphlet, have your serial numbers and radios handy. Your radio if not physically or water damaged is possibly still under warranty.

Most of the time when a set of radios has your problem description, it is the Qt filter, or possible improper use of a special feature such as call tones or iVox. These would be the first things to check.

Best regards.

Here is a link to the user guide: http://www.giantintl.com/ContentManage/manuals/Moto/T8500%20English%20only%20June5.pdf

Mar 09, 2010 | Motorola Talkabout® T8500R Two Way Radio

1 Answer

Can transmit to a FV700 moto, but FV700 cannot hear me. Same Ch 6 and code 1


Not certain what model radio you are using to transmit, it is possible your radio has a Qt filter. If so, set it to zero. If this does not solve the problem, try setting your Code to zero also.

Best regards.

Feb 20, 2010 | Motorola T8500 Two Way Radio

1 Answer

18 miles max range but actual it can transmit and


The reason for this is due to various possible conditions. The first being obstacles in the operation range of the unit. IE> hills buildings trees ect. This can greatly reduce the actual distance the unit will work in. The 18mile max is probably a rating that would apply in the best opt. scenario. You would have to be on a flat terrain with no hills or valleys,no trees or buildings for the unit to reach the max distance. In dense areas of trees,buildings or uneven terrian you wont even come close to these distances. Second: any unit RF unit that is held in your hand or close to your body does cause the antenna to detune to various degrees the amount that it does depends on how well the unit has been designed. The more it detunes the less resonated frequence is recieved and amplified making for a weaker signal. In conclusion for the best long range reception be clear of as much surronding interference as possible and as high a possible above any elevated terrian

Jan 17, 2010 | Motorola T8500 Two Way Radio

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T8500 no recieve transmit vibrates when PPP is pressed


http://www.giantintl.com/ContentManage/manuals/Moto/T8500%20English%20only%20June5.pdf

Try checking the vibra call settings for your vibrating issue. Also, as for the radios not communicating with one another you should check the programming of the frequency, interference eliminator and the Qt filter. All radios must be identical to work together.

Apr 27, 2009 | Motorola T8500 Two Way Radio

1 Answer

We have 4 T8500 - only one can talk, the other 3 only recieve.


Can you tell if the radio is actually transmitting? Is there any sound on the transmitting radio or a light inditcating that it is indeed transmitting? If not maybe the PTT button is malfunctioning. Try to use a microphone plugged into the accessory jack and see if it works. Another option is if you have a radio scanner, search the frequency range while transmitting and see if you pick up that open carrier.

Feb 24, 2009 | Motorola T8500 Two Way Radio

1 Answer

Problem with Motorola t8500


Check your Qt filter setting. It works best in the "off" position.

Jan 17, 2009 | Motorola T8500 Two Way Radio

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