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Speed of Ampico A Pump and Motor
By Ralph Nielsen 

Darryl,  Typical mid-1920's Ampico A instruments were usually fitted
with an 1150 rpm 1/8-horsepower Holtzer Cabot motor with a 1.75"
diameter pulley, resulting in a final pump speed of about 125 rpm.

Best regards,
Ralph Nielsen
http://www.historicpianos.com/

(Message sent Fri, 4 Dec 2015 01:40:48 -0700 , from time zone -0700.)

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