RT3S unwanted transmissions detected

[DF2HB]

Hi, With external Retevis Mike plugged in, the RT-3S transmits a very short carrier burst each 25 seconds.
And no unwanted transmissions without the external microphone plugged in.
It can be detected by short illumination of the red tx-led, the transmission-tone, and it can be seen as well on an additional SDR-Receiver in mode SSB in the waterfall diagramm.
any suggestion?
Jörn, DF2HB

[VK3KYY]

Hi, With external Retevis Mike plugged in, the RT-3S transmits a very short carrier burst each 25 seconds.
And no unwanted transmissions without the external microphone plugged in.
It can be detected by short illumination of the red tx-led, the transmission-tone, and it can be seen as well on an additional SDR-Receiver in mode SSB in the waterfall diagramm.
any suggestion?
Jörn, DF2HB

Sounds like the mic is faulty and has leakage on the PTT signal

[S54BR]

This happens to me too
I have an external microphone on a retevis rt3s KENWOOD SMC-32 and it transmits to me every 15 seconds as if I press the PTT button. On the repeater, the transmission is not detected at all.

The other station (Anytone 878) does not have this problem.
Any idea??

[SA0BUX]

Can't see this on RT3S (TYT mcu) fw 20240412 and Retevis speaker microphone