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+--- Thread: shield the E-field ? (/showthread.php?tid=1374)
RE: shield the E-field ? - Knickohr - 2015-06-27
Ahhh,
these f... electronic switching power supply.
Why do you not use an "old fashioned" power supply with an big and heavy transformer in it ? If you use such an old linear regulator you have an build-in isolator-trafo in it. And the linear voltage regulator gives an excellent noise-free 5V supply. And if this doesn't work good enough, add an big choke, as Steph post before.
http://de.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?partNumber=2431582
Powering the BO-station from PC is the worst thing you can do. A PC is a "mudslinger" as it's best !
Thomas
RE: shield the E-field ? - Rothuize - 2015-06-27
(2015-06-27, 18:10)Knickohr Wrote: Ahhh,
these f... electronic switching power supply.
Why do you not use an "old fashioned" power supply with an big and heavy transformer in it ? If you use such an old linear regulator you have an build-in isolator-trafo in it. And the linear voltage regulator gives an excellent noise-free 5V supply. And if this doesn't work good enough, add an big choke, as Steph post before.
http://de.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?partNumber=2431582
Powering the BO-station from PC is the worst thing you can do. A PC is a "mudslinger" as it's best !
Thomas
;-) normal I don't just the PC als power supply only now for 2 min
and ok that ## thing is no good why I have this to my Board ?
and maybe I have a old one some ware but must look
so that one from the iphone will also not work ;-)
many info on 1 day
thanks for al the hard thinking
Gert
RE: shield the E-field ? - Rothuize - 2015-07-26
hi just a little update
the power supply from the board make indeed lot of noise ( can hear it on a am radio very loud )
but this is not the cause
now I have also try a netfilter its a schaffner fs23638-10-07 but also with this many noise
so this will also not working
also I have to switch off all my power into the house and ask for some power to my neighbours
but also many noise
I have also call to the agentschaptelecom.nl but there say we can not help you ??
also I have sent a letter to the owner from that powerhouse (stedin) and wait for answer
more I can not do
greetings Gert