"Jeff Layman" wrote in message
On 06/10/17 08:20, Jeff Layman wrote:
On 05/10/17 21:17, Pinnerite wrote:
I need to partially rewire my apartment. I am tempted to replace some
double-switched sockets with those that incorporate USB sockets.
Some are described as Switched USB Socket 13A 2-gang + 2 USB.
Can I assume that the USB sockets on these are actually switched and
no current until a plug is inserted?
If you have any experience of these things I would appreciate the
Somewhat OT to your question, but what is the RFI like from these
unswitchable USB power supplies? There's an interesting video here
showing the interference from a cheap and nasty power supply compared to
a branded one. OK, it's not USB but the principle is the same. What I
found interesting was that there was a fair amount of RFI even when the
rubbish SMPS was unloaded. That's somewhat similar to the situation with
these built-in mains-socket USB power supplies. I just hope they're well
filtered. At least you can unplug a noisy wallwart!
Forgot the link! It was supposed to be:
The link should be https://www.ukqrm.org.uk/smps.php
Well worth watching both videos on there.