I used to have a catalog that described how to slow blowers and it depended
on the type of motor. One type you can use a resistor in line, the other
type requires the use of an ac capacitor in-line.
73, Roger
W7TZ
CN83ia
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On Thu, Jan 27, 2022 at 7:03 AM Byron Tatum<bjtatum1@att.net> wrote:
Thanks Guys- I appreciate all the suggestions on repairing my blowers.
The units I have are Kooltronics KBB47-5 with a motor #7162-0802. This
motor is 3400 RPM at 60 Hz. I am looking for a lower speed motor as this
blower is excessively noisy and I can get by with less airflow in SSB/CW
service. I need to stay with my existing housings as I cannot find any
replacements that have same bolt hole pattern (2-5/8" square) or flange
dimensions (3-1/4" square). What happens to these motors if I reduce the
voltage to slow them? Or, do they work this way, in other words is the
frequency of AC what should be varied? Say I was to lower AC voltage to 60
or 70 VAC, will the motor be negatively affected?Thanks,Byron W5FH
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