Quote Originally Posted by tunghaichuan
This was one of the first things I learned when I built my first 5F1 about 15 years ago. The output transformer was wound so that the blue was B+ and red was the plate connection. I hooked them up in reverse order, normally the standard: red as B+ and blue as plate/anode. Squeal city.
Looks like that would have been my fate as well, had I decided not to email TAD and be too smart for my own good about it. They've answered my email, and apparently the pictures on their website have been taken a long time ago when they were shipping the kits with a different output transformer. So just in case anyone else trying to build a TAD 5F1 Champ stumbles across this thread: take the layout's word over the pictures on the website. In my case, red goes to the power tube plate and blue to B+.

Went out hunting for a metal oxide 470 Ohm resistor today, the local shops did not carry any 2W ones, but I've managed to find a 3W 470 Ohm metal oxide resistor. I guess that should do fine.