Hello! Sorry for Bad English!
Have a noisy-buzzy sound from board(not loud, but i can simply hear it in a slince)

Sound:
0. mid-high frequency crackling-clicking-buzzing noise
1. more pps -> more sound

Board working stable. ver 5.25
LAN - only wireless clients(0..5)
WAN - static ip, ethernet

Any suggestions?

Sound coming from here(maybe from lf13a or not..):

It has no effect on the device operation. I suggest to keep it further than 1m away from your ear and it will be fine

Hello,
try to decrease wireless tx power

I have the same problem. Tried with RB433AH, RB600A, SR5, R5H and R52Hn. Any combination of board and card makes noise. Also tried different power supplies (12, 24 and 48V), no difference. Is there a solution, since I'm sleeping in that room?

Hello. Try this:
viewtopic.php?f=3&t=122645&p=604426&hil ... ue#p603766

Unfortunately this is very common with Mikrotik products.

Thanks. I see that there isn't much help... RB433AH ana SR5 is quietest combination (both MikroTik cardshave 4R7 power incuctor witch makes noise, and RB600A is louder for some reason), I'll stick to that.

See my post about strange sound

viewtopic.php?f=3&t=92269