Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!usc!zaphod.mps.ohio-state.edu!rpi!crdgw1!ge-dab!peora!tarpit!bilver!bill
From: bill@bilver.UUCP (Bill Vermillion)
Newsgroups: comp.sys.tandy
Subject: Re: TRS-80 Model I
Keywords: monitor
Message-ID: <439@bilver.UUCP>
Date: 15 Jan 90 16:52:20 GMT
References: <719@dgis.dtic.dla.mil>
Reply-To: bill@bilver.UUCP (Bill Vermillion)
Organization: W. J. Vermillion, Winter Park, FL
Lines: 35

In article <719@dgis.dtic.dla.mil> tswenson@dgis.dtic.dla.mil (Timothy Swenson) writes:
>
>	I have recently picked up a used TRS-80 Model I 
>with the monitor.  In shipping the monitor has been
>trashed.  Does someone know if there is a way to get the
>Model I to send output to a TV?  Is there an RF modulator
>made for the Model I?  Or better yet, does anyone have
>an old Model I monitor that they would like to part
>with?
>	I hate to see this computer just sit in the closet.
>Can anyone help me?  Thanks,

Well Tim, the Model I is what got me started in computers in 1977.

I would say forget the model I monitor as they weren't that good to start
with.  It was nothing more than an RCA tv set with the tuners out.  It also
had a hot chassis so it had an opto-isolator card put in to keep from frying
things.  To put a real monitor on is a "piece of pie - cake!".

The 5 pin DIN connector on the the back has 3 connections in it.  One is a
common ground for the other two signals.  One has video, and one has 5 volts
for the optoisolator.

Get a cable for a mono cassette machine, one that has a 5 pin din on one side,
and two rca cable on the other.  Measure the one for 5 volts.  Cut it off.
Use the other as a direct video in from the I to a monitor.  I did this years
ago, and the improvement is astounding.  You sould be able to pick up a used
monitor (with composite input for $30  or so).

Have fun!

bill
-- 
Bill Vermillion - UUCP: {uiucuxc,hoptoad,petsd}!peora!tarpit!bilver!bill
                      : bill@bilver.UUCP