In article ,
Brian Gaff wrote:
I remember back in the days of the first vcrs. A Philips 1501 would cut
out for no apparent reason. In the end after much messing about running
it with the bottom hinged down, two Mullard rectifiers were removed from
the pcb and found to have lose wires in the green/blue mouldings on one
end I took out the other two as well and replaced them with an
assortment of reclaimed rectifiers culled from old junked gear and never
another problem. It seems to me that when companies first started to
encapsulate things the movement under heating and cooling over time was
a common failure mode Since then before I lost my sight, I have had
cause to change these Byxxx rectifiers many times in equipment. This
component will self destruct in 4 years.

It does seem to be one of the less common failures I've come across here,
though.

Could well be my fault - no thermal paste to the case. But then this amp
is hardly ever driven hard.

--
*Why isn't there mouse-flavoured cat food?

Dave Plowman London SW
To e-mail, change noise into sound.