[Amps] Centrifugal Blowers

[Joe]

On mine I have a light bulb in series with the blower, and if temp rises 
above a set point the bulb is by-passed.
Vary the wattage of the bulb till you get the desired speed.
Joe  WB9SBD / W9ET

On 1/27/2022 12:54 PM, Roger - W7TZ wrote:
> 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 at 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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