I have the same problem here. There are a couple of pirate stations that
have been occasionally showing up on my repeater. My response is to shut
the repeater off for a while. My codes were originally sequential, like
12340=OFF and 12341=ON. I changed the ON code to something completely
different so it would be more difficult to figure out.

My long term solution is to install an external controller (S-COM) on
the repeater that mutes DTMF and add an audio delay board to eliminate
the first DTMF digit.

I had thought of how to use the TKR-750 alone to mute DTMF, but could
not find an option to do this. A trick that I thought would work is to
program codes to disable the repeater and then channel switch to a
different receive frequency that will pass through the duplexer. You can
then do your DTMF commands on a different frequency than the input
frequency. It's just an idea, but I never figured out the details to see
if it would actually work.

My external S-Com controller will allow more flexibility, like changing
power, changing PL, switching to DCS, macros, etc that the limited
internal controller cannot do. It also adds the important option of a
control receiver.

73, Joe, K1ike

On 2/19/2021 8:23 AM, srikanth bhat via groups.io wrote:
> Hello,
> I have set up DTMF remote control for the TKR-750. The control commands are going to be repeated (and heard, copied by all users) when they are sent to the input frequency to remote control the repeater.? Is there a way to prevent this to ensure remote controls are only accessible to the admin?
> tnx & 73
> Sri, vu2sbj