What setup fixes sprite flicker in the original Zelda on CRT?

[Luke.W]

I’ve been trying to get the original Legend of Zelda for NES to run on my CRT without that annoying flicker when too many sprites are on screen, but I can’t seem to get the right combination of hardware. My friend says using a composite cable instead of RF helps with sprite flicker, but on my setup it still gets pretty bad in rooms like the Lost Woods.

[ScottPL]

I tried that too. On my CRT the NES with a composite cable did shave a bit of the edge flicker when the screen got busy, but in Lost Woods rooms it still looked jaggy and you could see the sprite limits kicking in. It wasn't a miracle, just a faint improvement I could notice standing close.

[EleanorH]

I keep thinking the bottleneck is the NES PPU and its 8 sprites per scanline rule more than anything you plug in. Even with a better cable you can't magic away all those render collisions in a dense room. Some days I swear it feels random which rooms behave.

[JamesCS]

Do you know if your CRT's input stage is really giving you a clean signal, or could the monitor be masking the problem a bit? I once swapped a few cables and the picture looked different on a different set, and it made me doubt whether the issue was the NES or the screen.

[JeffreyLH]

I remember one night I just shrugged and kept playing in brighter lighting, the flicker less noticeable, and it felt like a small win even if nothing changed on the hardware.