noisy and fluctuating analog Inputs and TX Voltage

thanks for helping an electronic newbie, midelic

meanwhile i-ve used a coil that looks similar to the 350uH Coil in the video from the LC-Filter Link that you postet @ the FrskyX Thread.(Diode in series)
And 4pc parallel 2200uF Low ESR Elekrtolyt Caps from an motherboard ....looks good so far....stable voltage on TX Side.
slow fluctuating 0.1V on Module Side
i`ve calculated with your links calculator and it gives to low frequency in this combination
But of coarse i dont know the uH of my coil for sure

Should i buy this one, and use it with one Cap (2200uF), then im near the right frequency.
The coil i used looks like this

Puuh... hard for me

@Alexandro: which LC-Filter do you have ordered

Hello, i ordered this one
lipoworld.de/de/zubehoer/elektronik-moto...ellbau-dji-gopro-fpv

its for FPV Video Transmitter.
greetings Alex

Do you habe sucess with this LC Filter?