My k8044 is over hot 
HELP ?
Take it out of the fireplace?
- Sorry, couldn’t resist

What part of it is hot?
If it is the BC640 transistors, then you might be overloading them.
To check if it’s the right bulb you can use amp * volts = watts
0.4 * 12 = 4.8W
So if I am correct, they should be 4.8W or less each. ![]()
Thanks