According to spaco :


Wonderful sound reproduction, Don!

Thanks. :-)

Some of my favorite sounds. Used to run a vacuum heat treating
department in the 60's. Had forepumps that could get an 80+ cubic foot
vessel down to 100 microns in a couple of minutes. We could fire up
the diffusion pumps when we hit the switch for the forepump and the oil
wouldn't get hot enough to backstream before we got in range.

Now *that* is impressive!

Enjoy,
DoN.

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