DIYAPASON-L Digest #22 - Sunday, January 30, 2000
 
Re: [Residence Organs]  Bouncing reservior
  by "Eric Sagmuller" <ess4@psu.edu>
Re: [theatreorgans-L] Ancillary high-pressure items (x-posted, also on DI
  by "Kevin Scott" <kscott@shell1.eznet.net>
Measuring Wind Pressures.
  by "Bruce, David" <David.Bruce@compaq.com>
 

(back) Subject: Re: [Residence Organs] Bouncing reservior From: "Eric Sagmuller" <ess4@psu.edu> Date: Sun, 30 Jan 2000 16:40:05 -0800   Thanks for the advice, I'll see if I can round up some springs to try.     >>I have only weights on it to regulate the pressure as most of the = compass >>springs were missing.        
(back) Subject: Re: [theatreorgans-L] Ancillary high-pressure items (x-posted, also on DIY) From: "Kevin Scott" <kscott@shell1.eznet.net> Date: Sun, 30 Jan 2000 19:27:12 -0500   Bob Acker wrote: > One of the easiest ways is to use a small 110v. stand alone blower -- I = have > two that I'm using obtained from Bob Maees of Kansas, City. These = blowers > are "removed" industrial sized copier "toner" blowers and with proper > cleaning and the addition of a run capacitor and small regulator work = nicely > for traps, shades, and tuned percussions. They are rated at about 18" = of > wind at 100 cfm.   I bought one of these back around 1992 or 1994, from C & H Sales Co., in Pasadena California, and the deal included a separate (large) capacitor for the motor. A year or two later, I called them back to try to get another, only to find that someone had bought up their remaining stock. Perhaps they went to Bob Maes.   The fan housing on mine is sealed to its circular "baseplate" with RTV-like stuff, so I've been hesitant to try to take it apart to clean out the toner. How did you clean yours?   Kevin Scott Rochester, NY  
(back) Subject: Measuring Wind Pressures. From: "Bruce, David" <David.Bruce@compaq.com> Date: Mon, 31 Jan 2000 09:07:18 +0800   There has been a thread recently on measuring wind pressures using a manometer (U-tube).   In past experience, I have found that if you only open the valve for the pipe-hole where the manometer is plugged in, you can get a false reading (usually high). I believe this is due to the regulator valve opening to make up for the lost air, but the system is still sealed and the result is that the pressure in the chest is raised. By opening a second valve and letting it exhaust to atmosphere, you will get a much better idea of what the regulator is actually regulating to.   The results I had in the past were with Wurlitzer copy regulators, running at 6", 8" and 10" pressures. Blower static was 17". The effect described above may have been a result of the difference between static and = regulated pressure.   Any of our professional friends on the list have any comments?   David Bruce