[Boatanchors] Question for Eimac 4-65A Tube
w_b_morton at hotmail.com
Sat Nov 7 13:50:32 EST 2020
My son and I have a question regarding firing up the filament of a 4-65A tube with no connection to the grid or plate (and no plate cap heat sink, either): If we light up the filament and leave it glowing for a long time, is there any danger to the tube? It would be akin to using it as a nightlight (which we are not). By a 'long time', let's say 5 hours.
Thanks in advance for any comments.
William, and Son
More information about the Boatanchors