); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: Thomas A. Frank <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Timing on Ethernet Date: Sat, 4 Aug 2007 23:54:53 -0400 Message-ID: <[EMAIL PROTECTED]>
> ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Ah, but what if one used the tunnel itself as a waveguide, and > propagated an RF signal down it? Would it then reliably arrive at all > the points, with a known delay? > > Since the tunnels are probably at least ten meters wide and tall, > that's a pretty low frequency, which is easy to generate, and not > likely to interfere with any of the equipment. > > Interesting use for some surplus 11 meter CB gear...and no wires > required. > > Does the theory that applies to say a WR-59 waveguide apply to a large > tunnel? The tunnels would most probably be round, so there's the hint. Theoretically you could use tunnels as waveguides but these would be loaded differently and create phase differances. The tunnels are never THAT straight so they will have differnt lengths. Stuff like that. This is certainly a problem which is best solved by means of cable-bound signals. Cheers, Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
