|Nov 24, 2013, 12:13 AM|
HK 540W power supply spewing RF
I've got kind of a weird problem...
I just got a 540W power supply from HK.
...and the problem is that the thing apparently spews RF noise, because its messing with the nearby FM clock radio that I have in my workshop (yes, some people still actually listen to FM radio). Every time I power it up, the clock radio loses power/signal, and only the strongest stations manage to come in somewhat clearly (yet they still seem under-powered and noisy/full of static).
Anyway, since I'm not an RF/electronics expert, I was wondering if maybe someone could provide a solution/workaround to 'shield' or lessen the amount of RF coming off of the power supply. Is there something that I can do similar to 'adding a toroid to a servo line' but at a larger, more heavy-duty scale? The power amp is huge, uses a computer power supply cable... Any feedback would be appreciated...
|Nov 24, 2013, 04:27 AM|
Joined Feb 2007
If it is mostly conducted noise you could add a mains filter such as
This is a UK supplier but they are widely available. Obviously be careful as the connections are at mains potential. You may be able to find such a device built into a mains plug with some searching on the net. It needs to be rated at 6A minimum for your PSU.
It looks as though the PSU is metal cased which means high radiated noise is unlikely. The unit should have an internal noise filter to stop conducted noise and there are legal requirements but it may be a disadvantage of buying cheap psus.
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