1702 Monitor s-video

[RadRacer203]

Just picked up a really nice 1702 monitor and I was planning to use it with more modern stuff using s-video. Is there an adapter that can let me plug s video into the chroma and luma rca jacks for sale or will I have to make my own?

 

[kgober]

I think S-Video specifies a different signal voltage than the Commodore 1702 uses, so you might need an active (powered) adapter for the best results.

 

[iz8dwf]

I think S-Video specifies a different signal voltage than the Commodore 1702 uses, so you might need an active (powered) adapter for the best results.

I connected the C64 output (that works fine with my 1702) to an S-Video usb card and it appears to work fine too.
I made my own adapter, but it seems there're suitable adapters for sale on ebay too. I made my own because I already had all the needed parts.

Frank

 

[RadRacer203]

Would that just be an s-video to rca cable? Or should I be looking for something specific on ebay?

 

[iz8dwf]

Would that just be an s-video to rca cable? Or should I be looking for something specific on ebay?

Original S-Video only has Luma and Chroma signals, so I made an S-Video to RCA splitter ending with two RCAs. I already have plenty of RCA video cables, so I didn't need something different.

Frank

 

[Jo22]

I had a Commodore 1702 as a kid, too.
The luma/chroma ports are kinda compatible to S-Video signals,
though they may not be using exactly the same singaling levels.

Anyway, I connected my Super Nintendo to it once by making a special cable,
and the picture was okay, even though not very pretty, so I went back to CVBS/Composite soon.

That being said, it likely was because the CRT either was too crisp/pixelated by itself
or the games were expected to be viewed on a slightly blurred screen.

 

[vwestlife]

This adapter would work, although you'll probably need to use it with RCA extension cables because it's so short:

https://console5.com/store/s-video-s-vhs-to-rca-y-c-luma-chroma-adapter-cable-6-15-cm.html

 

[NeXT]

I think S-Video specifies a different signal voltage than the Commodore 1702 uses, so you might need an active (powered) adapter for the best results.

It absolutely does not.
Jax184 has discussed adding S-video jacks to 1702 monitors on his website.

 

[Jibbajaba]

This adapter would work, although you'll probably need to use it with RCA extension cables because it's so short:

https://console5.com/store/s-video-s-vhs-to-rca-y-c-luma-chroma-adapter-cable-6-15-cm.html

That's what I use. Works great.

 

[kgober]

It absolutely does not.
Jax184 has discussed adding S-video jacks to 1702 monitors on his website.

I said "best results". With a passive adapter I think the picture might be a bit less bright and less saturated than it should be, because my recollection is that the 1702 expects 1V peak voltage while S-Video specifies something in the neighborhood of .7V to .9V. Basically, expect brightness to show only 75% of what was intended, and colors to be saturated only 90%. Still good and usable, just not the best. This is why when you are going in the opposite direction (from C64 to an S-Video monitor) you need a 300 ohm resistor on the chroma pin, so you don't get the opposite problem (oversaturated color).

 

[vwestlife]

Basically, expect brightness to show only 75% of what was intended, and colors to be saturated only 90%.

That can easily be compensated by adjusting the monitor's brightness and color controls.