Does anyone know how many db gain the original antennas for the M30, M30T RC plus controller is.

DJI reports it to the FCC as 2.5db for 2.4 Ghz and then for 5.8 Ghz ANT2 is 2.5db and ANT3 as 3.5db. You can read what I'm talking about here : https://fcc.report/FCC-ID/SS3-RM7002110/5684763

Johnnokomis Posted at 10-5 21:06
DJI reports it to the FCC as 2.5db for 2.4 Ghz and then for 5.8 Ghz ANT2 is 2.5db and ANT3 as 3.5db. You can read what I'm talking about here : https://fcc.report/FCC-ID/SS3-RM7002110/5684763

Thanks for the info, it was just what I needed

Hello, DroneRobert. Thank you for reaching out. We are sorry to inform you that there is no more information that can be found/no information about M30 DJI RC Plus db Gain. Could you kindly tell us what problems you encounter during use? And we can help you solve it.

However, here are some information that we found about DJI RC Plus:
Transmitter Power (EIRP)
2.4 GHz:<33 dBm(FCC);<20 dBm(CE/SRRC/MIC)
5.8 GHz:<33 dBm(FCC);<14 dBm(CE);<23 dBm(SRRC)

DJI Gamora Posted at 10-9 07:03
Hello, DroneRobert. Thank you for reaching out. We are sorry to inform you that there is no more information that can be found/no information about M30 DJI RC Plus db Gain. Could you kindly tell us what problems you encounter during use? And we can help you solve it.

However, here are some information that we found about DJI RC Plus:

This is just to compare the original antenna and the directional antenna, and how long cables I can use without this being worse than the original antenna.
Thanks for the information.

DroneRobert Posted at 10-9 21:04
This is just to compare the original antenna and the directional antenna, and how long cables I can use without this being worse than the original antenna.
Thanks for the information.

Are the two antenna ports on the RC Plus a known connector type or are they some DJI proprietary size? I heard in the past that it wasn't a universal type and am wondering if that is true?   

Johnnokomis Posted at 10-10 18:59
Are the two antenna ports on the RC Plus a known connector type or are they some DJI proprietary size? I heard in the past that it wasn't a universal type and am wondering if that is true?

I use an MCX-Male to RP Sma-female adapter, Like this one:
https://droneparts.de/en/dji-cendence-antennas-dp-sma-conversion-adapter-1-pc