On 20 ene, 23:51, "Phil Allison" wrote:

Anyhow, check or replace C808 *on the Vcc *- it might be high ESR.

Update: Replaced the IC and a handful of zeners, I modified the
heatink by drilling a new hole so as to attach it well, and added
fresh heatsink compound. I think this was the reason for the first one
failing after 30 mins, it was not the tightest fit on the heatsink.
c808 had already been changed.

Set ran all night without probs and heatink ran at a reasonable temp.
So - touch wood - it is fixed
cheers.
-B