B bengelha New Member Joined Dec 16, 2020 Messages 4 Dec 17, 2020 #1 SunRain says 300 C. Is this typical? In other words, do solar concentration systems have to have specialized vacuum tubes? Note: I'm guessing the selective coating is the weak point, but would be interested to know the answer to this too.
SunRain says 300 C. Is this typical? In other words, do solar concentration systems have to have specialized vacuum tubes? Note: I'm guessing the selective coating is the weak point, but would be interested to know the answer to this too.
