SF Schematic based on my 2_11_09 layout and build. Update C - 12-17-09. Following were changed: V2a had a 1.8k Cathode resistor but the layout had 820r - which was the original from Rev 3 of the FF. I built it with 820r so I fixed the schematic and now it is 820r. Also fixed the heater ct - it goes to the V3 cathodes now (labeled "C ref"). Also made the TC/Scoop switch box a little clearer - I hope. Let me know if you see any errors - just add a comment.