On Tue, 25 Nov 2008 05:27:10 +1100, "Rod Speed"
wrote:

[snip]


They dont have any transformer that uses power all the time.

Possible with any wall-wart you add a switch to. Making it automatic
would be tricky, without power to turn it back on.


"Switcher" refers to a more efficient voltage regulator,

Wrong. It always refers to what you listed above.


That's one of the many varieties of "always" that are strangely
non-inclusive. Maybe you've never heard of "switching regulators", but
I have a lot.

The AC-to-AC converter allows a smaller, lighter transformer (which I
expect draws less power with 0 load).. Perhaps you mistake "low power"
for "no power". That sort of mistake is very common.

[snip]