In message , Arny Krueger
writes

"Ian Jackson" wrote in message
news
In message , Arny Krueger
writes

"Dave Plowman (News)" wrote in message
...
In article ,
Bill Wright wrote:
I used to have a 12V DC kettle and it managed to boil two cups of water
quite quickly. It pulled about 30A!

With only 360 watts, 'quite quickly' wouldn't be how I describe it. A
3kW
kettle (rare these days) does that quickly.

How long before electric kettles have switchmode power supplies?

Lots of options including charging up a local cap or battery and use it to
speed the boiling process well beyond what can be done with just line
power.

Just think of the amount of RF hash that could be created by a cheap,
badly-designed 3kW switchmode power supply!

OTOH, well-designed ones are becoming very common.

The existing rubbish generated by PLT, plasma TVs, arcing thermostats etc
would pale into insignificance.

I have two power amps with ca. 2 KW switchmode power supplies. They
manage -100 dB total spurious responses, with their switchmode parts only
inches from the input terminals.

But I bet they cost a bit more than your average £15/£25 domestic
kettle!
--
Ian