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From: bobt@pogo.WV.TEK.COM (Bob Tidrick)
Newsgroups: sci.electronics
Subject: Re: Tunnel Radio (was reception)
Message-ID: <7639@pogo.WV.TEK.COM>
Date: 24 Jul 89 20:17:49 GMT
References: <Jul.19.14.48.15.1989.439@athos.rutgers.edu> <81@vax87.auc.dk> <3890@phri.UUCP> <1566@unccvax.UUCP>
Reply-To: bobt@pogo.WV.TEK.COM (Bob Tidrick)
Organization: Tektronix, Inc., Wilsonville,  OR.
Lines: 11


If I remember correctly as it was explained to me some years ago, The
transmitters are mearly broadband amplifiers transmitting just what thay
receive in a given bandpass. The antena is a longwire matched to the
amplifier. I hope I am right about this it has been a number of years since
I was told this by one of the persons who built the system for our Vista
Ridge tunnel in Portland OR.
                                                Bob Tidrick
                                                GPID Engineering
                                                Tektronix Inc.
                                                Wilsonville OR.