Ultra low noise measurement amp

[jackinnj]

We were just looking at low level signals at work over the weekend, and saw this unexplained 28kHz waveform. Sure enough it was the overhead fluorescents with their solid state ballasts. At home I use a CFL in my workbench lamp, but I always keep a regular bulb handy for low noise work.

Did you hear the story of the clerk at Home Depot who dropped a CFL bulb -- the EPA had to come in and shut the place down.

My nanogenarian uncle stocks up on incandescent's every time he goes to Wal Mart or Target.

The only time to do measurements here in suburban NJ is Saturday mornings...I do have some brass screening material left over from when the window screens were changed from those of the 1940's.