Quote Originally Posted by tunghaichuan
To put in a screen grid resistor, go to the eyelet for the second cap from the left, the one where the green and brown resistors are. You would solder in the end of a 470 ohm 2-5W resistor there (in addition to the two already there) and solder the other end to pin 4 on the 6V6 tube socket.
OK, I did get that - I just thought that by "decoupling resistor" you meant the second green resistor from their picture. BTW, my kit came with one green resistor (the 5W one connected in parallel with the 4th cap). The one connecting the legs of the 1st and 2nd cap is a carbon comp 1W/10k. Hopefully it won't change its resistivity rating when soldering, as I don't have a replacement for it.

I thought about using a clip-on heat sink of some sort (most likely a plain alligator clip) when soldering the next resistors, but I keep wondering if that will solve anything since once I power up the amp the resistors will get current flowing through them with likely similar effects.