> I forgot to say I put a linear
> stabylized 5V power supply on the primary output (thus the feedback line)
> in
> order to check against the aluminium caps with no luck.

I think it would be an electrolytic capacitor on the primary side. Either
the main ones or the UC3844 supply. Thay could cause bad oscillation and
all sorts of problems.

Cheers,

Bob


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