[Elecraft] OT power supply question

[Mike WA8BXN]

Probably inrush current charging the capacitor(s), I have heard it in other
supplies (astron). You could shock mount the transformer maybe if it bothers
you too much! 
73/72 - Mike WA8BXN
 
 
-------Original Message-------

 
I use a Pyramid power supply. PS35G to be exact. Sometimes when I turn it on
it makes a thudding sound.
WT5Y
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