Quote:
Originally Posted by Findm-Keepm
With the Saw-resonator based modulators (last 15 years or so from Alps, Matsushita, Murata, and Toshiba), they lock dead on, with zero harmonics - any noise is typically a ground loop or RF leakage. I like HVAC tin foil tape for RF leakage issues, although the last I've really experienced was with the old OAK and SciAtlanta Cable boxes. Once they went addressable, we no longer could repair them.
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Shouldn't be any RF leakage, but I think it's ground loop issues. On the Sega Genesis, it's VERY sensitive with these RF modulators (Sega was certainly reluctant to put adequate filtering on it). The modulator works great otherwise, even as simple as it is. Since removing it to prepare possibly sending it to OP, as expected, RGB video cleaned up and lost the jailbars I was seeing before.
This is what this tiny little RF modulator has inside:
http://i.imgur.com/zY5KfdD.jpg
No idea what the POT does, I'm guessing output power, but I have no plans to mess with it.