[Elecraft] (OT) - Unplanned Discovery

Matthew Cook vk5zm at bistre.net
Sun Nov 19 23:52:54 EST 2017


Josh,

You are quite correct.   The usual CISPR standards limits for many SMPS
designs are typically set to 50dBuV across the HF spectrum, that translates
to roughly 5/9+17dB.

These standards are there to protect your old analog TV and commercial FM
radio being messed up not your local Ham operator unfortunately.

73

Matthew
VK5ZM



On 20 November 2017 at 13:25, Josh <josh at voodoolab.com> wrote:

> Most, if not all of those certifications are for safety, not emissions.
> Further, I'm not at all convinced that compliance with FCC/CISPR standards
> ensures no RFI to a ham station. Especially if your interests are weak
> signal, EME, etc.
>
> 73,
> Josh W6XU
>
> Sent from my mobile device
>
> > Just because it has the side or back posted with all types of
> certifications basically says  "they met specs at one time".
> >
>
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