Quote:
Originally Posted by fujifrontier
Not to highjack the thread, but what would happen if the button was broken, or it lost vaccum while a CRT was in operation? The heaters would burn up as soon as air enterd the tube, right?
|
No. If a tube starts to lose its' vacuum during operation, it will immediately begin to arc all over the gun mount with blue sparks. This is how you can tell quickly in a solid state set if you have a broken tube or not and you can certainly hear it with a distinctive sound that sounds like a loud hissing in the tube itself. Strangely, the filament will not open up as it is very tough and goes to almost zero ohms as like a dead short. There is not enough current in the filament voltage to make it burn out. (later sets mostly)