"Phil Anderson" wrote in message
news:WMgZa.74397$Oz4.17285@rwcrnsc54...
I need advice on replacing the cooling fan on my GAS Ampzilla.
The current fan was too loud, so I tried slowing it down with an
inline resistor. I got the voltage so low that the fan will not
even spin unless I reach inside and give the blade a spin. That
is both easy to forget and annoying to do.

**Er, use a smaller value resistor. Alternatively, you could replace the fan
with a new one, which has better bearings and can cope with lower Voltages.
You could also kick the fan into high speed, at switch on, then allow the
resistor to come in, to drop the speed down.


Can I replace this with a computer cooling fan?

**Not usually. Computer fans are generally 12 Volt DC and pretty crappy.
They're also difficult to add speed control to.

What size do I
need?

**Same size as the oringal.

How about a speed control? My Ampzilla needs very little
cooling, but if the fan is all the way off it will overheat after
a few hours.

**Papst make some excellent termperature-sensitive fans, which would be
appropriate for your needs.

--
Trevor Wilson
www.rageaudio.com.au