From: utzoo!decvax!harpo!seismo!hao!hplabs!sri-unix!Schiller@MIT-MULTICS
Newsgroups: net.aviation
Title: Re: Radios on Airlines
Article-I.D.: sri-unix.4884
Posted: Fri Dec 17 11:33:10 1982
Received: Fri Dec 24 01:26:09 1982

From:  Schiller at MIT-MULTICS (Jeffrey I. Schiller)
A VHF or UHF radio of sufficient power (and most HT's are) can mess up
all forms of electronic equipment. Basically if there is a wire (or
printed circuit run) that is just the right length, significant voltages
can develope. I have seen 432MHz radios do things like cause train
crossing gates to go down, and computer systems to crash.  The reference
to a cabin pressurization system came out of a recent issue of QST
magazine. The aircraft I believe was a 747, which has a fairly
sophisticated automatic pressure regulating system that could be knocked
out of kilter by a UHF radio at close range.

		-Jeff