It seems that TenTec has cooling fan problems in most of their amps.
The Titan 425 also had a noisy "fan". The cabinet seemed to be a
sounding
board.
I don't understand why cooling can't be quiet. My furnace fan makes
less noise
and cools a heck of a lot bigger volume. It's just a matter of
engineering.
Sold Titan partially because of the fan noise.
73 de Brian/K3KO
Duane A Calvin wrote:
>
> Hi Jim,
> The fan noise is why I traded my Centaur in on a Centurion amp. The
> Centaur does an excellent job, otherwise. (and the Centurion looks so
> pretty next to the VI+!)
> I did not perform the surgery on mine, but I can tell what my
> "alternate" plan was. You will find if you remove the case that the fan
> makes very little noise. But hold anything in front of the fan input
> (use a Mouser backscratcher !) and you will hear the beginnings of the
> noise. According to an acoustic/thermal engineer at my place of
> employment who looked at it, TT simply mounted the fan too close to an
> obstruction (cabinet side) such that there is turbulence generated at the
> leading edge of the fan blades, and that is where the noise is generated.
> This engineer recommended starting with punching round holes in the side
> of the case in the fan intake area. If that didn't provide enough noise
> abatement, he recommended removing all the case material at the fan
> intake (and I would add, cover it with one of the kits available in
> Newark to filter the air and keep fingers and other large objects from
> finding their way into the fan or the case.) This was not a tested fix,
> but this guy has a lot of experience on cooling fan noise problems, and,
> as I mentioned, removing the case will almost totally eliminate the
>
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