Question about Motorola SX800R (22 Channels) 2-Way Radio

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How to make them work again

Our radios wont work at all, they wont transmit or receive when both units have every option the same, so we were wondering how to reset them or what else we shoud try. thanks

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Agent Ken
  • 250 Answers

SOURCE: No audio but transmits ok

Hello dgbuhl,

Check the Continuous Tone Coded Squelch (CTCSS) settings on all the radios. (Note that some manufacturers refer to this feature as a Privacy Code or Quiet Code. The actual name of the feature may vary.)

In order for your radios to communicate with eachother all of the radios need to be on the same channel and have the same CTCSS / Privacy Code programmed (or the CTCSS feature must be disabled on all the radios). If CTCSS is enabled on one of the radios, but not the other, the situation you describe would occur.
Check your user's manual for more information on the Privacy Tones and how to set them.

Best Regards,
Go Ahead. Use Us.

Posted on May 12, 2008

  • 123 Answers

SOURCE: Midland GTX800 "X-Tra Talk" 2-way radios will not transmit

Are you sure that the batteries are running well?
Try using alkaline batteries just for testing.

Posted on Jan 23, 2009

  • 1640 Answers

SOURCE: my customer has 6 motorola max trac vhf radios.

If this is a new install, it is likely noise from the vehicles electrical system scrambling the processor of the radio. Put a filter on the power leads and check your install.

Posted on Aug 31, 2009

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I would guess you have a PL set on the receive side, and not on the Transmit side. So the audio is being blocked by the PL (as it is supposed to be!) Check your programming, make sure you have the same PL on tx and rx.

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1) Double check your interference code eliminator and the Qt filter. Make certain they are all set identical.

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3) Then if you still have trouble shut off the code. (Off is sometimes "zero" or "n" for no.)

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My customer has 6 motorola max trac vhf radios. all have same problem, they transmit just fine & then they just quit transmitting, they still receive but wont transmit until they turn unit off &...

If this is a new install, it is likely noise from the vehicles electrical system scrambling the processor of the radio. Put a filter on the power leads and check your install.

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Check the input voltage into the radio while in transmit. The voltage maybe dropping as you go into transmit which causes it to drop into receive. That in turn allows the voltage to come back up. With your finger still on the PTT it tries to transmit again, etc. This could cause a feedback squeal and other symptoms.

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T5420 unable to transmit or receive. Please help!

Here is a link to the T5000-T5500 user manual. ''

From what you have stated, I can discern the radios will power up. You might try setting your interference eliminators to zero (off) to see if you are able to transmit at all.

You do not mention if you are using AA batteries or rechargeables. Either way a fresh set of charged batteries would be best for a test. It is clear you were getting power. However, it does take more energy to transmit than to receive. If your batteries are low or bad, pressing the PTT could us all the energy the radio has, and yet not transmit to the other units.

You might also check you VOX settings if any and be certain they are turned off.

It is not likely 4 radios would fail all at the same time. So it is probably a programming problem. Hope the user manual helps you find the solution.

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I have never seen this problem before, check if the VOX is activated, this could cause to transmit the radio, but the voice must be transmited. check if the Accesory connector is not dirty, clogged or damaged

Feb 08, 2007 | Motorola Talkabout T5720 (7 Channels)...

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