Xref: utzoo sci.electronics:2554 rec.ham-radio:4288
Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!sgi!daisy!david
From: david@daisy.UUCP (David Schachter)
Newsgroups: sci.electronics,rec.ham-radio
Subject: Re: Television Data Transmission
Message-ID: <939@daisy.UUCP>
Date: 17 Mar 88 17:31:55 GMT
References: <533@imagine.PAWL.RPI.EDU> <4063@batcomputer.tn.cornell.edu>
Reply-To: david@daisy.UUCP (David Schachter)
Organization: Daisy Systems Corp., Mountain View, Ca.
Lines: 21


I read of an exceedingly cheap low power NTSC-to-RF converter.  The
power output may be too low; I'm sure someone will post a small amp design.

The method, written in Electronics magazine a decade or so ago, is to put
NTSC signal into a TTL inverter chip.  One type of inverter (LS, I think)
can't respond fast enough to the input signal, goes into it's linear
range of operation, distorts horribly (since TTL gates aren't designed to
be good linear amplifiers!),  and generates the correct signal for various
TV channels.  

Of course, it also generates lot of other crap too.  And you can't get
audio.  And I doubt color will work too well.  And the resolution may not
be too great.  But the cost is low.

If you blow up something, don't blame me.  I never built it; I simply read
the article and was impressed by the simplicity and cleverness.

					-- David Schachter

Standard disclaimer: the site I'm posting from doesn't adhere to my opinions.
"I'm not home right now.  Please wait for the tone, then hang up.  Thank you."