Hi William,

I did not list the different methods I tried, starting with different
weights on top, insuring that everything is "tight" inside, checking
the rubber mounts used by the compressor, different small carpets
for it to sit on, and many other techniques.

My latest attempt, I used two boards with holes near each end and
long threaded rods (with nuts, flat & lock washers) through the holes in order
to squeeze the sides (boards against sides) of the cabinet. So far (one day),
it seems to work, but other methods I tried in the past seemed to work, but
only for a while.

Since this cold spell hit us, the dehumidifier is turned off. I will have
to wait until warmer weather comes back before I use it again. If this
latest technique works for at least two weeks, I will post an "update".

John


On Fri, 7 May 2010 16:35:18 +0000 (UTC), in sci.electronics.repair you wrote:

William Sommerwerck wrote:
What about putting something heavy on the dehumidifier to dampen the sound?

or jam some rolled up/folded cardboard wherever you can to make parts
vibrate less. This hack works on machinery with vibrating panels or other
parts that make noise even louder.