"N_Cook" wrote in message
...
Gareth Magennis wrote in message
...


"Gareth Magennis" wrote in message
...


"Arfa Daily" wrote in message
news
"N_Cook" wrote in message
...

20 degrees is about the most or you block off access to the TO3s.
Maybe
only
tinkering at the heat build up problem. Most air must go through the

Oh, BTW, can you confirm which way the fans run? Sucking air out the
cabinet or blowing it in?



Gareth.


This one is outwards
4,000 sq mm of purpose built inlet holes and 3,300 sq mm through fan vent
I
would have thought was quite adequate if the air was directed over the
heatsinks and not wind-breaked. This one permanent mounted high up away
from
floor dust.
Compared with Laney CD850 , totally inadequate constriction on outlet over
fan .
3 of those I've cut away the "vent" holes over the fan, fared off and
covered with a wire grille and they've not bounced back (each was cutting
out thermally after extended but normal use)
As the Laney original design just 14 small slots with a combined area of
only 1.5 sq
inches, let alone vortexing, so overloading the 3 inch diameter fan
with through ducted area of about 6 sq ins , ridiculous aerodynamics





Thought so.
I did once think about reversing the fan, blowing air into the amplifier,
but there is too much risk of the impeller being fouled by a blow to the
casing around the vents. Surely this would mean more internal turbulence,
thus better cooling?
It must have been designed this way round for a reason, though, (?) so I
gave up on that idea.



Gareth.