[SCCC] OT: low RFI USB-C power supply?

[Ryan Huggins]

I have not done any evaluations myself, but I did a quick search and saw a similar discussion on a Flex Radio forum.  Someone there recommended "Jameco" as a source to buy good ones.  I took a quick look at their site and found this one:
https://www.jameco.com/z/DCT18W050300US-A0-Jameco-ReliaPro-5-Volt-3-Amp-15-Watt-Regulated-Switching-Wall-Adapter-USB-Type-C_2318927.html

It does not specifically mention RFI, and I assume you can contact them with the question, but it is UL and FCC stamped which gives me hope.  It's only $8 too.  Would be worth checking into their return policy.

I've been hunting down RFI in my house as well.  Lots of type 43 ferrites and kits from Palomar-Engineers.  I had a wall wart for my Roku that was putting off 2-3 bars worth of noise (granted on the other end of the house).  A couple wraps through a clip-on ferrite helped reduce that greatly, so that may be an option too.  I put one at the Roku end as well.



-73
Ryan, KI6BTY


On Friday, November 3rd, 2023 at 8:00 AM, Drew Arnett <arnett.drew at gmail.com> wrote:


> I've started chasing down a new noise source at home. (Early
> assessment shows it's getting on the AC wiring and conducting all over
> the house.) Probing around, looks like a new piece of gear that is
> powered by USB-C and has a USB-C wall wart that was included is quite
> RFI hot. I'm hoping it's the supply and not the load, so swapping
> supply might cure it.
> 
> USB-C power supplies are somewhat new. None are going to be specified
> for conducted or radiated RFI. Has anyone done any evaluations, so I
> can simply purchase once? Or do I have to do the equipment
> evaluations?
> 
> Thanks and best regards,
> 
> Drew
> n7da
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