bentendo64
Active Member
This is a guid-ish sort of thing, I guess. Not really. I was gonna post this in the "Screens" section, but I guess that's gone now....
Anyway, down to business.
I picked up an old crt for free from a hotel that was upgrading. The original plan was to drive the deflection coils with an audio amp and graph parametrics. As it turns out, you need a pretty good amp for a tube of this size to do that, so something else had to be done with it.
RGB video input seemed like a good idea. I have a Super Nintendo that can output it, and the N64 can, too with a bit of modification.
So I cracked open the TV, and guessed at which wires coming off of the video amp/CRT connector would be for the individual color signals. It's pretty easy to tell, because most of the time they're labelled. But mine weren't. I made an educated guess at the three wires that I traced back to three identical circuits on the board containing a transistor.
And then I cut and soldered RCA jacks to the wires.
First test:
The wires weren't labelled as to which were red, green, and blue, so I had to guess. I just mixed up the green and blue signals.
Oh, and before I forget, for syncing, I just connected composite to the composite input on the TV. I don't know if it will work with the actual composite sync signal, because it didn't for me. That might just be because of my cable, though. I don't think that part of it was grounded, I can't remember exactly how I built my cable.
Anyway, all normal now:
And don't forget the proper labels!
Anyway, down to business.
I picked up an old crt for free from a hotel that was upgrading. The original plan was to drive the deflection coils with an audio amp and graph parametrics. As it turns out, you need a pretty good amp for a tube of this size to do that, so something else had to be done with it.
RGB video input seemed like a good idea. I have a Super Nintendo that can output it, and the N64 can, too with a bit of modification.
So I cracked open the TV, and guessed at which wires coming off of the video amp/CRT connector would be for the individual color signals. It's pretty easy to tell, because most of the time they're labelled. But mine weren't. I made an educated guess at the three wires that I traced back to three identical circuits on the board containing a transistor.
And then I cut and soldered RCA jacks to the wires.
First test:
The wires weren't labelled as to which were red, green, and blue, so I had to guess. I just mixed up the green and blue signals.
Oh, and before I forget, for syncing, I just connected composite to the composite input on the TV. I don't know if it will work with the actual composite sync signal, because it didn't for me. That might just be because of my cable, though. I don't think that part of it was grounded, I can't remember exactly how I built my cable.
Anyway, all normal now:
And don't forget the proper labels!
You are correct; component and composite use the YUV color space rather than RGB colors
