Modifying a B&W TV for composite video input - test-drb@ccmp.vtda.org

1 Jul 2003

Alltronics (http://www.alltronics.com/computer_miscellaneous.htm) has a video-composite
adaptor for $5:

<quote>
TTL TO COMPOSITE VIDEO ADAPTER 
Requires +12V (or +5V) and video, vertical drive, horizontal drive signals. Produces
RS-170 type composite video output. Fully assembled with 74125 sync regenerator, 3
terminal regulator, 2N2222 transistor. Only 2" square. 
92C024    $4.95 each 
</quote>

It looks like the adaptor I used to have for my Osborne 1.

Bob

-----Original Message-----
From: Hans Franke [mailto:Hans.Franke@mch20.sbs.de]
Sent: Tuesday, July 01, 2003 2:50 AM
To: cctalk(a)classiccmp.org
Subject: Re: Modifying a B&W TV for composite video input

...
  > I would think the easiest and cheapest way is to
use a plain old RF 
 > modulator box that will put composite video on to channel 3 or 4. I've 
 > taken apart one or two and they seem to have little more than a few 
 > coils and small parts, a far cry from the rack mounted cable TV 
 > modulators I just picked up(ooohh... so many trimmer caps and 
 > coils...). I don't know a whole lot about it, but I'm slowly learning 
 > as my interest in fast scan ATV increases... The converter box I have 
 > goes with my TI-99, 
...
  Those little RF boxes don't really convert from
composite to RF, they 
 just provide a switch and a connection to a TV antenna input. 
Communication error!

While you where refering to the common (video game) switch boxes,
John did mention modulators! they are usualy the same size (ok,
the TI one is a true brick), but do what they are named, modulate
the composite signal onto a TV carrier.

The one I like most is the Amiga 520 (?).

Gruss
H.

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