TRS-80 Model 1 Monitor

Matt Patoray mspproductions at
Wed Apr 8 17:55:37 CDT 2015

The model 1 did in fact use an RCA B&W tv with the tuner Amplifier/speaker
and IF card removed, the video cable came out of the spot left by the
removed volume knob. You can use a standard NTSC monitor.

Connect pin 5 of the DIN connector to the shield of a coax cable and
connect pin 4 of the DIN connector to the center conductor, then terminate
the coax cable with an RCA connector and connect the cable to your monitor.

You can connect the cable to a standard composite video in, bu you will get
a better picture if you connect it to the Green(Y) connector on a
component input (if your monitor can do 480i on component)

On Wed, Apr 8, 2015 at 6:49 PM, Robert Jarratt <robert.jarratt at>

> I have finally managed to get my hands on a TRS-80 Model 1. Trouble is, it
> came without a monitor. I have been doing some searching to see if I can
> find out what kind of monitor it is and I am left unsure. All I have found
> so far is a statement which says it is a TV without a tuner. I am not sure
> what that means. I still have a CRT TV, can that be made to work, or have I
> bought something that I can't use?
> Thanks
> Rob

Matt Patoray
Owner, MSP Productions
mspproductions at
KD8AMG Amateur Radio Call Sign

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