Admiral Roundie Something explodes

[jeyurkon]

Originally Posted by DaveWM

pretty sure it uses a switching power supply for the filament, that is what you are hearing, mine does it to, its pretty hi pitch, I would guess in the 10-12khz range.

If it's 12kHZ I might have trouble hearing it. I suppose it would also vary in loudness quite a bit depending on the specific components, also background noise. I'll pay closer attention the next time I use it.