"dpb" wrote in message
...
On 10/1/2013 12:07 PM, SteveB wrote:

One "former life" was with CSI, Knoxville, a leader; in their new
products group. There we developed the first commercial wireless
vibrometer which won a "Product of the Year" award back in early
90s...


In the mid 80's I dragged my vacuum-tube spectrum analyzer into work
to analyze a vibration problem that had the engineers stumped. It
showed the vibration very clearly, but the engineers didn't know how
to interpret the results. Mechanical and electrical engineering were
separate kingdoms there and fortunately fixing it was their problem,
not mine.

Our non-contact position sensor was a little Radio Shack solar cell
with the shadow of the test subject falling part way across it.

jsw