DIYAPASON-L Digest #558 - Wednesday, April 10, 2002
 
Re: [Residence Organs]  Lead pipes (was: Buck up, Dr. Sefl)
  by "Jimmy" <jrbaird@erols.com>
How much because of how many?
  by <Pipewheezr@aol.com>
Calcluating for a power supply for an organ.
  by "Richard Schneider" <arpschneider@starband.net>
Re: [Residence Organs]  Calcluating for a power supply for an organ.
  by "Berley Antoine Firmin II" <FIRMAN1@prodigy.net>
Archives
  by "Eric Sagmuller" <ess4@psu.edu>
 

(back) Subject: Re: [Residence Organs] Lead pipes (was: Buck up, Dr. Sefl) From: "Jimmy" <jrbaird@erols.com> Date: Wed, 10 Apr 2002 10:23:27 -0400   TommyLee Whitlock wrote: > > > This to drown > > out the experience of dealing with EPA (Environmental Protection = Agency) who > > wants me to replace all of the lead pipes in one of my clients = instruments > > with leadless ones!   Of course they are dangerous!!!!!! Think of all those church mice that chew on old pipes (upper lip) and get lead poisoning (and ruin the pipe speech). Sigh.....   Couldn't resist the above.   Jimmy Baird  
(back) Subject: How much because of how many? From: <Pipewheezr@aol.com> Date: Wed, 10 Apr 2002 10:41:05 EDT   I have a question about power supplies. How many amps. To run ten ranks of straight chest's, eleven ranks of DE chest's and seven or eight ranks Electro-Pneumatic? Plus or minus a few goodies later! Thank you for the information. Dennis Cloudy Sany Eggo.  
(back) Subject: Calcluating for a power supply for an organ. From: "Richard Schneider" <arpschneider@starband.net> Date: Wed, 10 Apr 2002 11:35:33 -0500   Pipewheezr@aol.com wrote: > I have a question about power supplies. > How many amps. To run ten ranks of straight chest's, eleven ranks of DE > chest's and seven or eight ranks Electro-Pneumatic? Plus or minus a few > goodies later!   > Thank you for the information.   Eleventy Bazillion Amps!   Seriously:   You need to come up with the current draw of the magnets in question and then calculate. You do this by going to Radio Shack and investing in a $9.95 Digital Ohmmeter and then go measure the resistance of all of the magnets you anticipate using and "charting" that information for reference purposes.   Simple Ohm's Law tells us that Current in Amps is calculated by the following simple equation: Amps =3D Volts/Resistance (expressed in Ohms). =   For simplicity in calculation, we'll use the following example: a 50 Ohm Chest Magnet on 15 Volts will use 0.3 Amps of current. Obviously: the higher the resistance, the lower the current draw is, which is why it is important to know this.   Now, if you were going to use 100% of all of the magnets, you'd need a power supply capable of delivering the amount of power I suggested above, but in practice, you "de-rate" this staggering sum by figuring out the maximum number of magnets that could possibly be playing at any given time with all of the stops on X 10 Fingers + 2 Feet. This would give you a Demand Factor. You would also add a "fudge factor" to this to make allowance for current drop due to runs of wire, etc. Since the cables themselves also have resistance to be calculated in.   All of this means that I, nor anyone else, cannot simply give you an arbitrary number because there are so many variables involved. However, you should now have enough information that you should be able to work out the calculations for yourself in short order. Faithfully,   Grandpa Arp -- Richard Schneider, PRES/CEO SCHNEIDER PIPE ORGANS, Inc. Pipe Organ Builders 41-43 Johnston St./P.O. Box 137 Kenney, IL 61749-0137 (217) 944-2454 VOX (217) 944-2527 FAX mailto:arpschneider@starband.net HOME EMAIL mailto:arp@schneiderpipeorgans.com SHOP EMAIL http://www.schneiderpipeorgans.com WEB PAGE URL  
(back) Subject: Re: [Residence Organs] Calcluating for a power supply for an organ. From: "Berley Antoine Firmin II" <FIRMAN1@prodigy.net> Date: Wed, 10 Apr 2002 14:11:47 -0500   Can some kind soul tell me how to access the archives? thanks Berley A. Firmin II FIRMAN1@prodigy.net        
(back) Subject: Archives From: "Eric Sagmuller" <ess4@psu.edu> Date: Wed, 10 Apr 2002 15:25:49 -0400   Diyapason web sight:   http://www.diyapason.pipechat.org/ See left column of page to select archives.   The archives only go to Nov. 2000 though so far.       At 02:11 PM 4/10/2002 -0500, you wrote: >Can some kind soul tell me how to access the archives? >thanks >Berley A. Firmin II >FIRMAN1@prodigy.net > > > > >DIYAPASON-L: a Discussion list for owners and builders of their own >Residence Pipe Organs. >HOMEPAGE : http://www.diyapason.pipechat.org >List: mailto:DIYAPASON-L@pipechat.org >Administration: mailto:owner-DIYAPASON@pipechat.org