shield the E-field ?
#27
Isolation transformers can (depending on type) transduce several 100kHz, so this probably won't work very well and is expensive.
I'd recommend putting a choke between the PSU and the controller.  Make as much as possible windings on a Epcos T37 ring core, or N30. This will help, if the noise is coming from the power line.
I made some measurements on that:
   

But as i said earlier, a clean grounding is most important for e-field. Vertical ground rods don't work well, because the current is seperating at earth surface due skin effect, leaving a big ground resistance.
Ideally large expanses of vertical wires just below earth surface are used. the more and the longer, the better.
   

But a direct wire to the water supply pipe will be enough for our purpose in most cases, as long the pipe is of metal and not PVC.
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Messages In This Thread
shield the E-field ? - by Rothuize - 2015-06-22, 20:42
RE: shield the E-field ? - by Knickohr - 2015-06-23, 07:52
RE: shield the E-field ? - by Rothuize - 2015-06-23, 16:52
RE: shield the E-field ? - by cutty - 2015-06-23, 09:38
RE: shield the E-field ? - by Steph - 2015-06-23, 11:29
RE: shield the E-field ? - by cutty - 2015-06-23, 12:06
RE: shield the E-field ? - by Steph - 2015-06-23, 15:42
RE: shield the E-field ? - by cutty - 2015-06-23, 16:12
RE: shield the E-field ? - by Rothuize - 2015-06-23, 17:21
RE: shield the E-field ? - by Knickohr - 2015-06-23, 17:57
RE: shield the E-field ? - by cutty - 2015-06-23, 20:19
RE: shield the E-field ? - by Rothuize - 2015-06-24, 16:36
RE: shield the E-field ? - by Knickohr - 2015-06-24, 16:46
RE: shield the E-field ? - by Rothuize - 2015-06-24, 17:11
RE: shield the E-field ? - by Knickohr - 2015-06-24, 17:32
RE: shield the E-field ? - by cutty - 2015-06-24, 19:57
RE: shield the E-field ? - by Rothuize - 2015-06-24, 21:23
RE: shield the E-field ? - by cutty - 2015-06-24, 22:26
RE: shield the E-field ? - by cutty - 2015-06-25, 15:06
RE: shield the E-field ? - by Rothuize - 2015-06-27, 13:04
RE: shield the E-field ? - by Knickohr - 2015-06-27, 14:07
RE: shield the E-field ? - by cutty - 2015-06-27, 14:28
RE: shield the E-field ? - by Knickohr - 2015-06-27, 14:40
RE: shield the E-field ? - by Rothuize - 2015-06-27, 17:07
RE: shield the E-field ? - by Knickohr - 2015-06-27, 17:19
RE: shield the E-field ? - by Rothuize - 2015-06-27, 17:33
RE: shield the E-field ? - by Steph - 2015-06-27, 17:41
RE: shield the E-field ? - by Rothuize - 2015-06-27, 18:06
RE: shield the E-field ? - by Knickohr - 2015-06-27, 17:42
RE: shield the E-field ? - by Rothuize - 2015-06-27, 18:00
RE: shield the E-field ? - by Knickohr - 2015-06-27, 18:10
RE: shield the E-field ? - by Rothuize - 2015-06-27, 18:26
RE: shield the E-field ? - by Rothuize - 2015-07-26, 12:40

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