PipeChat Digest #522 - Wednesday, September 16, 1998
 
Re: Power sag from blower startup...Solution to blower startup problems
  by <ORGANUT@aol.com>
Re: A place for the Theatre Organ Enthusiast back
  by "bruce cornely" <cremona84000@webtv.net>
Re: Web Pages Please!
  by <DRAWKNOB@aol.com>
Re: Jesse
  by <ComposerTX@aol.com>
 


(back) Subject: Re: Power sag from blower startup...Solution to blower startup problems From: ORGANUT@aol.com Date: Tue, 15 Sep 1998 23:11:46 EDT   Kevin,   The best thing going for 3phase A/C induction motors is a device called adjustable frequency drive. This is a solid state device which takes single phase or three phase power on the input side and converts it to adjustable frequency three phase power on the output side. Since the speed of an A/C induction motor is determined by the line frequency of the A/C power, this device starts the motor from zero and slowly accelerates it to whatever max speed has been selected. This process is called soft start, and limits the motor start current to a level far below that of a "locked rotor across the line start". You also have full torque regardless of the speed setting. These devices are now available at a price less than an equivalent size rotophase unit. I am using a five horsepower unit on my pipe organ, and was able to get the spencer blower to go from 12" static to 15" static by increasing the speed from 1725 to 1800 RPM. If you or anyone else is interested in one of these adjustable frequency solid state drives, let me know and I can go into a more detailed explanation of the unit, and what its' limitations are.   I recently retired from Miss Power Co. and many of the electric utilities are using these devices on smaller A/C induction motors(1 to 25 HP) for energy management.   The 5 HP unit I have Is approximately 7 inches square by 7 inches deep, is microprocessor controlled, and has a keypad for setting up operating parameters, runs very cool and cost $545.00   ORGANUT @AOL.COM Phil Lons Jr. 228-832-3475  
(back) Subject: Re: A place for the Theatre Organ Enthusiast back From: cremona84000@webtv.net (bruce cornely) Date: Wed, 16 Sep 1998 00:01:18 -0400 (EDT)     >James Grebe >R.P.T. of the P.T.G. >=A0 St. Louis, MO. >Competent Service since 1962 =A0 Just curious...... were you incompetent before 1962??? 8-D hehehe   ........................bruce cornely........................ o o o o ______________ o o o o o h o o ______________ o o g o o o s o ______________ o a o o   ............. cremona84000@webtv.net ............     I'd be happy to have my biography be the stories of my dogs. To me, to live without dogs would mean accepting a form of blindness. --Thomas McGuane    
(back) Subject: Re: Web Pages Please! From: DRAWKNOB@aol.com Date: Wed, 16 Sep 1998 00:01:06 EDT   In a message dated 9/15/98 6:06:32 PM Central Daylight Time, bombarde8@juno.com writes:   << I'm going to surf the web at school during my study halls. I was wondering if anybody had a list of web page addresses that I could check out. (Organ Related) Organ builders, organ chat-lines, organ-related pages, etc... >>   Jason,   Here's my "humble" web page, which has a few interesting organ related links: http://members.tripod.com/~organist_johng/index.html   Good luck!   John Gambill  
(back) Subject: Re: Jesse From: ComposerTX@aol.com Date: Wed, 16 Sep 1998 01:18:47 EDT   an alternate fingering for chromatic scales would be: 3rd finger on all black keys 1st finger on most white keys, except the addition of 2nd finger when you come to the E-F and the B-C intervals regards, Danny Ray