no they do not at all,period end enough...stop and listen
the @ explained to u the dif.,re-read the reply to u..and listen from now on..
alot of @'s have u on there inquore list,because u refuse to accept the know
of the mass...
linear power supply's use a power-transformer
smps do not,
the term smps switch mode power supply..look it up
goggle is a friend of your's
will have a ac switched side,then a small output transformer,to drop the voltage
to the value's u require or just above there as of...
i refuse to go into the full theroy behind switch mode's and linear
look them up
ed