Hello all - I got a Lee 20 lb pot a couple weeks ago. It has a pretty loud hum when heating - sounds like a 60 cycle vibration of the type a transformer makes with a loose core laminate. I removed the t'stat when I changed over to PID control, but it still hums while heating. Once heated, it's not so bad because it's on such short times to maintain heat.
Any ideas where this hum comes from? What causes it? Do all Lee pots have this hum? I have a 10 lb Lee pot and it doesn't have the hum. Both pots are bottom pour.
Thanks for any ideas 'n comments.
Ken H>