One of the strengths of the Internet is that material can be pulled up from years back with a few keystrokes. One of the weaknesses of the Internet is that a current search can come up with material from years back in a few keystrokes. . . once old material turns up, it must be evaluated, and the observation that 1997 was the last original posting on this subject is a clue that might be missed but is crucial to understanding the viability of the subject matter. This thread is a very nice demonstration of that. Thanks, guys, for a tidy little exercise in critical thinking (and showing off electrical engineering smarts).

SRS