[Elecraft] MFJ-4125 Fan Noise

[N0SA]

I just returned mine for a full refund and went with an Astron power supply.
I had tried putting the MFJ in the desk drawer but I could still hear it
<
quote author="John H Gibson">
Question for the List:

I recently bought an MFJ-4125 switching power supply to use with my K3/100 
transceiver. While otherwise satisfactory, the MFJ-4125 has an
objectionably-
noisy fan.

On my MFJ-4125, over half of the fan exhaust openings on the back of the 
supply are blocke
d by the fan's motor housing, which makes me believe that the 
power supply originally was designed for a different fan (perhaps a quieter
one), 
and this fan is an expedient substitute by MFJ.

I would like to know if other users also are bothered by the MFJ-4125's fan 
noise, and what they have done about it. 

Have you substituted a quieter fan? Have you installed a series resistor to
slow 
down the fan, and with what result? Have you installed a thermostatic switch
to 
run the fan only when needed? Or have you given up and simply bought a 
quieter power supply?

Any advice would be appreciated.

73,
John, no8v

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