MD-380 motorboat sound

When I transmit with a MD-380 and a rubber-duck antenna, there is a "motorboat" sound on my transmit audio when using a Retelvis speaker mic.  I opened the mic and observed that they are not using a shielded mic cable.  When I transmit into a dummy load or an outside antenna the "motorboat" sound is gone.

Has anyone been able to fix this RF into audio problem and what speaker microphones do not have this problem?

The problem goes away when you use the proper mic for it... such as the following unit.

DMR modulation on MD-380 without helicopter sound

DMR modulation on MD-380 without helicopter sound


DMR modulation on MD-380 with helicopter sound

Retevis RT3 / Tytera MD-380 backlight mod

Retevis RT3 / Tytera MD-380 backlight mod

Tytera MD380 MD390 voice support forum

Free voice support chat for Tytera radios using the IOS or Android (install) free app called ZELLO and using the channel called "# Tytera". Join our help support forum.

TinyURL was created! tytera380

TinyURL was created!

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tinyurl.com/tytera380

The following URL:
http://md380.blogspot.com/
has a length of 26 characters and resulted in the following TinyURL which has a length of 28 characters: http://tinyurl.com/tytera380

Capacity Plus Scanning with Experimental MD-380 Firmware

Capacity Plus Scanning with Experimental MD-380 Firmware

Scanning a 4 channel Capacity Plus system with a MD-380. This was with the experimental software that allows the radio to listen to any DMR traffic heard. I have set up one channel as a scan channel.