Baofeng Baofeng UV-5R disable transmit

[PaulStevo]

First post after attempting to find answer to title.
As a motorsport marshal Im attempting to disable the transmit option on the UV-5R as not to interfere with track communication.
Have followed all the guides on you tube and other web sites to no avail.
I have purchased the coms cable for the UV-5R and un ticked the appropriate tx boxes within the latest Chirp software .
Upon uploading the new setting to the radio the transmit is still active. Have attempted this numerous times and it does show both frequency boxes unticked .
Upon disconnecting coms cable from radio upon switch on transit still active. What is weird I have managed to change the welcome message and that has transferred to radio.
Lots of fellow marshals have been successful doing this . Im wondering are the newer UV-5Rs not taking the no transmit option in Chirp?
Any advice or help much appreciated as its so frustrating .
Regards Paul

 

[OkieBoyKJ5JFG]

In CHIRP there's a column marked "Duplex". The pull-down box in that column has 4 options: +, -, split, and off. Setting Duplex to "off" should disable the radio's ability to transmit on that frequency.

 

[Echo4Thirty]

In CHIRP there's a column marked "Duplex". The pull-down box in that column has 4 options: +, -, split, and off. Setting Duplex to "off" should disable the radio's ability to transmit on that frequency.

Wouldnt that just make the radio transmit on simplex?

 

[nd5y]

Wouldnt that just make the radio transmit on simplex?

No.

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[PaulStevo]

 

[PaulStevo]

Cannot see that column you have mentioned just this as described with both vhf and uhf un ticked ?

 

[OkieBoyKJ5JFG]

Cannot see that column you have mentioned just this as described with both vhf and uhf un ticked ?

Go into the "Memories" tab, select the channel you want to disable tx on, and select Duplex off. You have to disable it on each channel individually, but it will do what you want. You can still listen to and scan those channels; you just can't transmit. That's what I do on FRS and MURS frequencies.