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From: ERWINVL.DLOS@XEROX.ARPA
Newsgroups: net.ham-radio
Subject: Re: Update: eavesdropping on SCA transmissions
Message-ID: <8666@brl-tgr.ARPA>
Date: Tue, 26-Feb-85 13:06:26 EST
Article-I.D.: brl-tgr.8666
Posted: Tue Feb 26 13:06:26 1985
Date-Received: Fri, 1-Mar-85 09:15:55 EST
Sender: news@brl-tgr.ARPA
Lines: 13

BOB,

SOUNDS LIKE A LOT OF TROUBLE JUST TO LISTEN TO SCA. I HAVE BEEN
LISTENING TO SCA FOR AROUND 8 YRS NOW. LOOK AT ONE OF THE OLDER
SIGNETICS APPLICATIONS BOOKS AND THERE IS A SLICK LITTLE CIRCUIT THAT
WILL ALLOW YOU TO DO IT WITH A 565 PHASE LOCK LOOP CHIP. THE 565 DOES
THE DETECTION AT 67 KHZ WHICH MEANS THAT YOU DON'T NEED TWO RECEIVERS!!.
JUST TUNE THE FM RECEIVER AND THE PLL DOES ITS THING!!

                          REGARDS,

                          VAL L. ERWIN
                          W5PUT