Actually, two different supplies, two different labels, same trash on 6 and somewhat on HF. When plugging in the docking station the noise gets even worse.
What makes me "badmouth" Dell is that, having found the power supplies inadequate, I can't easily solve the problem (by substituting a nice, quiet linear supply) because of their proprietary design. BTW, for those who suggested using a Targus supply: that dog won't hunt. Obviously, you haven't actually TRIED to use a Targus supply - because, if you did, you'd be swearing a blue streak much as I am. The D610 has the "sensing" circuitry and software/firmware. It's essentially a Dallas chip that has to provide the "proper" handshake in order for the system to work properly.
How would you like it if you had to go to the car dealership (stealership) to do every oil change, battery replacement, part replacement, or your car wouldn't work? (sounds of crickets chirping heard...) Yeah, I thought so.
My plan is to dissect one of my good power supplies, dismount the Dallas chip and diode, supply a 100 ohm resistor, and build a pack that will mount to whatever linear, quiet, power supply I decide to use and provide the "proper" signal to the computer.
BTW, this has NOTHING to do with buying something on FleaBay and everything to do with crappy engineering.
over and out,
Steve, W1ES/4