The pressure drop as well as the noise drop will be exponential.
However, if a tube with a large anode cooler is used - such as an 8171
- a 1700-rpm blower will usually do the job, especially for SSB and
telegraphy. What is the diameter of the squirrel cage, Ken?
*******Rich, The diameter of the blade is 9.5 inches.
*******Thanks,
*******Ken W2DTC
On Apr 10, 2004, at 9:13 PM, kenw2dtc wrote:
Hi,
I have a Dayton pressure blower that puts out 820 CFM with a 3450 RPM
1/3 HP motor. If I substitute a 1725 RPM 1/4 HP motor will the CFM drop
in
half? Will the roaring sound drop accordingly also? I hope there is a
straight formula rather than working with fan diameter and number of blades
etc?
73,
Ken W2DTC
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