Mod a CRT to increase its TVL

[nes.og]

Thanks for the info @vol.2

Does the mod really increase TVL if you use a TVL test pattern or does it just make the scan lines sharper?

Correct, It makes your monitor look like a hi res screen displaying low res content, horrible scan lines.
But kids these days froth on them scanlines. So hence this thread.

Get ready for a page of BS claiming TVL is increased. The only thing increased is the gap between them.

I assumed it didn’t actually increase real TVL or the TVs would have been set this way out of the box. I assumed it would make scan lines sharper as in finer and less visable like a higher TVL tube but maybe “sharper” wasn’t the best way to convey that.

If it makes them stand out more than it is not something I’m interested in since scanlines already really stand out on some tubes especially large ones with have a larger dot pinch. I have a Sony and Misubishi were the scanlines are already distracting.

[nes.og]

Thanks for the info @vol.2

Does the mod really increase TVL if you use a TVL test pattern or does it just make the scan lines sharper?

Correct, It makes your monitor look like a hi res screen displaying low res content, horrible scan lines.
But kids these days froth on them scanlines. So hence this thread.

Get ready for a page of BS claiming TVL is increased. The only thing increased is the gap between them.

I assumed it didn’t actually increase real TVL or the TVs would have been set this way out of the box. I assumed it would make scan lines sharper as in finer and less visable like a higher TVL tube but maybe “sharper” wasn’t the best way to convey that.

If it makes them stand out more than it is not something I’m interested in since scanlines already really stand out on some tubes especially large ones that have a larger dot pinch. I have a Sony and Misubishi were the scanlines are already distracting.

[vol.2]

I assumed it didn’t actually increase real TVL or the TVs would have been set this way out of the box. I assumed it would make scan lines sharper as in finer and less visable like a higher TVL tube but maybe “sharper” wasn’t the best way to convey that.

The author of this thread and his followers use a definition of TVLs that encompasses the effect of this mod. Luke referenced technical white papers written by television engineers that count the TVLs in such a way that it includes the spot size of the electron beams decreasing towards the minimum dot pitch of the phosphors. Once you hit the phosphor spot size, decreasing the spot size any more makes the moiré pattern visible in the raster because at that point it's smaller than the size of the shadow mask holes/slots/grill.

So Luke and others would argue that it does increase TVLs. I suggested that they revise the terminology but they were dead set against it (especially Luke). I think the point of using TVLs was to garner more attention for it, and it sure worked. I kind of don't like when people do stuff like that though; I would prefer that things are done in the most unsensationalized way possible. That keeps people more level-headed when it comes to expectations, and it doesn't get a bunch of inexperienced people to do dangerous things with the promise of improving their image quality.

But that didn't happen. As it stands, I don't think many people are talking about this anymore because it's a known quantity now. Once all the attention disappeared, Luke moved on; said he only likes tube TVs now or something. Go figure.

[nes.og]

Thanks for sharing. I’ll work on doing the mod and using the TVL test pattern before and after to see if the count changes.