Hello Folks,

I have uploaded to The PSN events page a file called vertical noise floor.

This is the Noise floor of my new vertical sensor that has a period of 4
secs.

Can someone please download the file with Winquake and do an FFT on the
file.

What you will see is a signature waveform that seems to be part of the
machine I built.
There always seems to be a lot of energy at .2 HZ with a roll of toward 1 HZ

Does this being a log scale, mean I has some noise peak, at .2 Hz ???
Is this real? or an artifact?

Ted TCID sent me a raw file from his machine, and the response is much
flatter.

My next test is to lock down the coil/magnet sensor and take a reading and
see what the noise floor looks like.

When I replace the coil with a short circuit across the input of the seismic
amplifier, I get what looks like a flat response line.

Any ideas comments welcome.

PauLC
W1VLF




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