Hello Stefan,
Thanks for the reply, with regard to the current transformer, where
does the 1 Ohm resistot go?? In your drawing of the chokes can I
assume the six turns each you drew is accurate and you intend me to
wind six turns on each core? Thanks!
Wednesday, June 7, 2017, 9:19:45 PM, you wrote:
> Hi Chris,
> Yes, maybe try a homemade filter. I would try something like in the
> attachment...
> Build yourselfe a current transformer and measure RF common mode
> currents in the supply line of the power supply. This can be done with a
> clamp ferrite which has a secondary winding and a 1 Ohm resistor. You
> can then measure the current with the scope, of course it is decoupled
> then. The common mode chokes may already help to lower such currents.
> Maybe even simple clamp ferrites on the supply cable can help if these
> is no other ground connection.
> Of course the ripple voltage of the DC voltage should be as small as
> possible. A few 1000 uF near the load may help too...
> 73, Stefan
> Am 07.06.2017 21:12, schrieb Lawrence Galea:
>> Hi Chris,
>> Did you Try capacitors across the supply lines right at the output
>> connectors and also from both + and - to earth?
>> Did you try the same at the mains input with suitable voltage rating?
>> Regards
>> Lawrence
--
Best regards,
Chris mailto:[email protected]
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