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From: ejk47@ihuxn.UUCP (Ed Kufeldt, ihux0 ejk47)
Newsgroups: net.micro
Subject: Re: Re: C64 data recorder
Message-ID: <450@ihuxn.UUCP>
Date: Fri, 9-Dec-83 09:31:06 EST
Article-I.D.: ihuxn.450
Posted: Fri Dec  9 09:31:06 1983
Date-Received: Sat, 10-Dec-83 22:30:39 EST
Organization: AT&T Bell Labs, Naperville, Il
Lines: 12

I response to Mr. Porter's article that you have to buy
a Commodore data recorder, I say BULL!  I have designed
and built a cassette interface for my Vic-20 that uses
any good and cheap cassette tape player.  I have been
using my interface for over a year and have experienced
no problems in writing or reading tapes.  The circuit
uses OP-Amps. in the input and ouput sections for filtering
the Vic's digital signals.  The OP-Amps. also have a set
threshold so spurious noise does not trigger them.  Also
a source for a good cassette interface is Protecto Ent. in
Barrington, Ill.  They have quite an inventory of hardware
and software for Commodore computers.