How much time do you have on the Mullards? They need at least 40-50 hours to burn in.
I use Mullards almost exclusively and have never found what you state to be the norm. Maybe new, right out of the box, but never after they've burned in.
Give them some time to break in...
I use Mullards almost exclusively and have never found what you state to be the norm. Maybe new, right out of the box, but never after they've burned in.
Give them some time to break in...