NTSC Composite Video Circuit Schematic

[yell0w_lantern]

Hello.

I have a 520 ST and I would like to build a composite circuit for this but my level of skill with electronics is only enough to follow cookbook-like directions. I found this zip but the schematic is in scd format and although I believe I found the site mentioned, setting up sdecode appears to involve some rather extensive downloads and updates.

Does anyone have a regular image file of a composite cicuit or know how to more easily unpack a scd file?

Note: I have a GBS8220 but I am looking to get this on to a regular TV and composite out will work for that AND give me a composite sync signal to use if I ever successfully a mod a CRT to accept analog RGB in.

Thanks in advance.

rgb2comp.zip