Mains filter IEC socket

[Borats Baby]

Yes, I'm here.. Hi... 😊

The noise issue, while still present, doesn't seem as bad as it was..

I've seen posts about ecc83 flare on power up and while I understand it's quite normal, it only happens on 2 of the 3 tubes in the amp.

I may replace all 3 as a matter of course anyway and see what happens..

 

[Mark Tillotson]

There is (was) a known problem with the RIFA packaged mains filters which I believe has now been solved. They used to use a plastic case
that could crack over time and allow moisture into the case. As these were metallised paper the moisture would cause them to fail with
explosive results. Ive just replaced this type of capacitor in some QUAD products I recently bought namely a 306, a 34 preamp and an FM4 tuner.
All showed signs of cracking and one fell apart when I removed it.

Some more investigation into the failure mode here: https://hackaday.com/2023/04/01/why-do-rifa-capacitors-fail/

 

[tiefbassuebertr]

check out this thread

Thread 'Blown X2 Cap in Mains Inlet RFI Power Filters (IEC C14, Schaffner, Schurter and others)'

2024-12-12 6:31 pm

Several components for hifi/home audio in used condition are danger even outside of operation, because the integrated capacitors in the mains inlet C14 plugs are not disconnect from mains after switch off the component (and not to check and for replace).
Therefore the aging is more extend and it is not possible to check the condition like describe under
because the parts are potted and thus not accessible without destroy.

A friend of me observe such...

• tiefbassuebertr
• Replies: 23
• Forum: Power Supplies