Xref: utzoo rec.ham-radio:23750 sci.electronics:13781
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!samsung!uunet!pilchuck!ssc!markz
From: markz@ssc.UUCP (Mark Zenier)
Newsgroups: rec.ham-radio,sci.electronics
Subject: Re: SCA decoder
Message-ID: <164@ssc.UUCP>
Date: 25 Aug 90 18:47:58 GMT
References: <3091@orbit.cts.com>
Organization: SSC, Inc., Seattle, WA
Lines: 19

In article <3091@orbit.cts.com>, rambler@pnet51.orb.mn.org (Dan Meyer) writes:
> in an article : markz@ssc.UUCP (Mark Zenier) says
> >Here is a description of an SCA decoder using the Motorola Mc3359 
> >Low Power Narrowband FM IF integrated circuit.
> 
> isn't there an easier way? Like a handful of inexpensive components, 
> like a 555 or 567 etc? 

The advantage of the circuit, which I didn't make clear in the
original posting is that it is easily tuneable.  Most of the
PLL circuits are limited to one subcarrier.  This one tunes
the stuff from 67 to 92 Khz with just a twiddle or two.
And if the input filter were more sophisticated, it would tune
the entire possible range.

The next step is to replace the 10.7 Mhz filters in my tuner to
see if the main program splatter is reduced.

markz@ssc.uucp