Quote:
Originally Posted by Tom9589
I'm going to repeat an urban legend here (which means it may or may not be true).
I heard the x-ray problem was due to GE not wanting to pay RCA royalties for using the 6BK4 and came out with their own shunt regulator which generated the x-rays.
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The problem came about due to faulty manufacturing in which the tube elements were not properly aligned. If all the elements were straight and concentric, the X-rays generated by the anode were blocked by the lower tube elements, but if mis-aligned, the tilted elements would allow some X-rays to escape around the edges.