Happy to say that the peaks of the last EMDrive V3 measurement (triggering the acoustic natural frequency of the setup by OOK modulated RF to the cavity) are most probably natural mechanical oscillations and NOT parasitic effects due to EMI.

(Cavity operated at resonance frequency - OOK modulated to generate vibrations. Read previous post for more details)

- I put the electret capsule into different places inside the setup.
Only if the capsule is mechanically attached to the cavity you can see the oscillations, there is no peak and so no measurable EMI in all other cases.

- Even if the capsule is loosely located on the cavity in the same position that gives a peak, but not sticked, there is no peak, so I can exclude EMI and capacitive coupling in this case.

- An electrical coupling is not probable. Even by electrically connecting the capsule´s casing to the cavity there is no peak. In normal case the capsule is isolated from the cavity.

Thanx to Aurelio Czargb Ramos for suggesting that the peak might be at the natural mechanical ringing frequency of the cavity. I checked this by performing another measurement with a 3 gramm mass added onto the cavity.

The results are here:

Waterfall A: No mass added
Waterfall B: 3 gramms mass added

In case B the ringing frequency is lower which is to expect for a greater oscillating mass.

The peak occurs at about 2680 Hz. I am using HDSDR software to display the spectrum. The picture shows a zoom into the graph in the CW mode. This is usually made for hearing morse signals in a constant wave transmission, so it has an offset of 700Hz from the center frequency. The center was set to about 2680Hz, so 720Hz in the graph represent 2700Hz in the signal - hope that´s not confusing.

After I was told that some trolls were laughing about me for just messing around and not naming the axes of my diagrams (which I did for offset reasons), so I better say it clear: These motherf*ckers don´t even read the description, they just start barking when someone shows some results.

I am really excited about following tests which will hopefully confirm a directional net force and not a lorentz force or similar.