<x-flowed>
         <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
         <<  Lancair Builders' Mail List  >>
         <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>

Dear Hal,

Your solution is the AV-1 altitude switch that is on every 747 and is made
by a company called Pressure Controls Inc. I had mine set for 11000' and
it cost $125 which I did not think was unreasonable. PCI are at (973)
751-5002
and my contact Paul was very helpful mailto:pcipaul@worldnet.att.net
Their web site is at
http://www1.thomasregister.com/olc/pressurecontrol/home.htm

FYI, they make a range of fluid/air pressure and vacuum switches, and
I purchased the V-10 adjustable vacuum switch to detect a vacuum
pump failure (also $125), and a LCD-2 pressure switch set for 40psi
to detect an oil pressure failure ($45.00) and a P-60 adjustable
pressure switch to detect low fuel pressure ($125).

Good Luck.
Allan Saul / IV-P Builder / South Africa

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.

</x-flowed>