[Amps] EBM-Papst speed control (WAS: Blower source)

[Jim Barber]

The datasheet for the 108mm flange EBM-Papst blowers suggests that you 
can switch between different value run capacitors for speed control. I 
wonder if anyone's tried that? It applies to the 91 CFM units at least, 
which require a nominal value of 4uF.

73,
Jim N7CXI

On 11/12/2010 5:31 PM, Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Fri, 12 Nov 2010 16:55:52 -0800, "Jim W7RY"<w7ry at inbox.com>  wrote:
>
>> You can see the EBM/PAPST unit that I'm using.  I don't have the exact
>> number on my blower handy. It's a cast aluminum housing and extremely well
>> balanced. Mine is 230 volts AC.
>
> REPLY:
>
> EBM-Papst is probably the Rolls Royce of blowers for ham use. I have one
> of the 91 CFM units in my HB amp and am very satisfied with it. They are
> expensive but worth it, IMO. Mine was about $140 two years ago. You must
> purchase a separate start/run capacitor for it, about $10 from
> McMaster-Carr.
>
> Newark carries them in the US.
>
> 73, Bill W6WRT
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