I have created a functional equivalent of the Harris RF-125 Blower noise
silencer. It is a metal utility box that fits over the blower inlet port. The
box is 9" x 5" x 6", comes gray painted, and you can buy it from Digi-key.
If you line it with sound absorption foam (NRF =.7), it completely eliminates
the high frequency whine from the blower. The RF-110A sits two feet away from
the operating position now. If anyone is interested, I have a 1.56mb zip file
that contains a description, an actual scale template, and two photos showing
installation that I can send you. 73,
Dave AG8B
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