Superlux S502 MK2 test, teardown and improvements

[Clem777]

Regarding some RFI problems reported by several people (affected S502 MKII and NOT S502 1st version) there may be an issue with the housing.
If you remove the 2 screws on the bottom side you will find 2 plastic space holders which bridge the gaps between top and bottom of the housing. These gaps can act as slot antennas to the inner part of the housing...
This issue can be repaired easily. Cut 2 pieces of kitchen aluminium foil and wrap them into the space holders at their inner side. After screwing the housing together top and bottom should have no interruption of the Faraday cage
PLS take this advice with a grain of salt. I am not able to execute EMC measurements at home...

Thank you so much, it's working for now!
I just wrapped the 2 plastic pieces with aluminium foil, I'll re-do it cleaner later
I don't have time right now to go outside for extended tests, but in my home it's working whereas without the aluminum foil I have RFI...
Took me exactly 3 minutes and gives a funny style to the microphone

 

[MicUlli]

If you do so, please show us some picts of how you manage that... (because Google Translate is often not very accurate...)

Yes i will when i mount the new board. Then you get also a lot more information

 

[MicUlli]

Thank you so much, it's working for now!
I just wrapped the 2 plastic pieces with aluminium foil, I'll re-do it cleaner later
I don't have time right now to go outside for extended tests, but in my home it's working whereas without the aluminum foil I have RFI...
Took me exactly 3 minutes and gives a funny style to the microphone

Wow, thats fine Never expected a so short term implementation. Thanks for the experiment