View Single Post
Old 22nd May 2010, 2:37 pm   #4
G8HQP Dave
Rest in Peace
 
Join Date: Sep 2008
Location: Solihull, West Midlands, UK.
Posts: 4,872
Default Re: A puzzling PSU Fault!

Yes, I think that is about right. If the current pulse was the same width, then the transformer heating would double, as you get twice the current for half the overall time and heating goes like I squared times t. In reality the pulse will widen, so it won't be quite as bad as twice the heating. Still enough to overheat a transformer which was probably only just good enough before the fault.
G8HQP Dave is offline