TV Tuner Schematics

Hi guys. :| I seem to be having some trouble. All I'm trying to do is find schematics for an NTSC TV tuner with composite video and audio output. But I can't seem to be able to do that... could someone help me with that please? Thanks.

Rain

You're looking for a "NTSC demodulator" search for that

Anyway, I would search for one to buy in stead of making it myself.
The making such a device becomes a pain in the... pretty fast.