[TenTec] Loud fan PS 963

[Tony Berg]

Hi Greg,

As a last ditch measure, you could try putting a resistor across the
thermal switch whose contacts are turning the fan on and off. This
will make the fan run all the time, but at a slower speed. Experiment
with the resistor's value to slow down the fan as much as is desired.
If this does not provide sufficient cooling, and the thermal switch
closes, it will short out the resistor, and the fan will run at full
speed as before.

I did this to my Astron SS-30, and I have used it this way for over a
year. No guarantees, though, as some fans are not rated for running at
lower than normal voltage, and if the fan fails, the 963 could
overheat and fail.

73, Tony  W1OT

On 9/26/09, Gregory & Kristin Palfe <gpalfe at comcast.net> wrote:
> Has anyone found a way to quite the rather loud fan on the 963 power
> supply?  Its constant on-off while sitting on the desk top is quite a
> distraction.
> Greg
> wa0bnx
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