Enercell vs Radio shack

[mrlthse]

Oooops, My error.
Your correct....
It's so small (compared to) I must have misplaced the 6V unit
I'll look for it and get back to Ya.
Thanks for pointing this out...

OK,
Now I'm on track...
The Enercell unit 6DC with 300MA
should have read the Cat No as 273-313.
I hit the wrong key when typing it in.
The question still sits as,
Is this a "switching power supply".
Sub note: Does it have a Humming"
problem when plugged in and is turned on.