On Thu, 13 May 2021 21:27:03 +0100, Peter Able wrote:

snip

That's an odd place to put the fan.

Agreed.

https://ibb.co/3FZYMPP

Sure looks like there's been some cooking and boiling !

Yeah, that ferrite was quite warm and one cap bulging but the caps
tested out similarly, eg, VLoss ~1.8%, Cap ~1150 uF and ESR ~ .1?

Cheers, T i m