For output and size, nothing beats Kynar film
produced by AMP in Valley Forge PA.  They
have a demo device which is a 1/2" x 3"
piece of film, laminated between two sheets
of light mylar, and a neon bulb riveted on one
end.  You hold it between finger and thumb
and wiggle, and the neon fires about ten times
in each direction, causing an arc of orange flashes
in a dark room.  I used the stuff for sensitive
microphones, hydrophones (buried in urethane)
and motion detectors.  It is not a static pressure
detector, only works on derivatives.

I have had comments in the past that my postings
contain weird trailers.  Could someone let me know
if this problem has been fixed?

John Shreffler
New Directions