Henry, I reported the exact same problem about a year ago. I used a "shielded"
audio Y-cable from Rad Shack to power the light in my TT 238B and the fan. As
long as the fan and the 238 were connected, the noise continued. If I plugged
the fan in directly, or even thru the Y but without the 238, no noise. I moved
the 238B to another power supply. Problem solved. Not sure how it's getting
noise in, but I'm suspecting a ground loop problem.
73, Duane
Duane Calvin, AC5AA
Austin, TX
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