Superlux S502 MK2 test, teardown and improvements

[jean-luc brion]

"Then subtract the resulting omni signal from both prefiltered ORTF signals."
Why subtract?

 

[Emmathom]

Hello everybody, I'm an unlucky owner of a S502MKII from 2020 with uber high sensitivity to radio magnetic interferences (see spectrum capture attached). I also own a S502MKI wich doesn’t have this problem. My setup is clean, simply switching from the MkI to MkII brings the interferences. I can manage to lower/avoid those interference on the MkII by adjusting mic placement and recorder position relative to mic, but it remains unusable for me.

@MicUlli I would be interested in 2 boards, do you think the new boards would solve the interferences issue on MkII?

That's exactly what I read on Thomann customers' reviews... interferences with MkII and none with MkI... But I guess it comes from the circuitry, not the capsules, so @MicUlli 's board should solve that

 

[bremusound]

Thread pitch = 0.5mm ! Thread outer diameter = 19.3mm
Finally managed to measure it today…

 

[Emmathom]

Thread pitch = 0.5mm !
Finally managed to measure it today…

Which body ? MkI or MkII ?

 

[bremusound]

Which body ? MkI or MkII ?

MK II