DIYAPASON-L Digest #215 - Wednesday, December 27, 2000
 
New Blower
  by "Bart Kleineweber" <prinzipal8@hotmail.com>
Re: [Residence Organs]  New Blower
  by "Kelvin Smith" <KelvinSmith@untraveledroad.com>
Re: [Residence Organs]  New Blower
  by "Jimmy" <jrbaird@erols.com>
Re: [Residence Organs]  New Blower
  by "Eric Sagmuller" <ess4@psu.edu>
Re: [Residence Organs] New Blower
  by "Bart Kleineweber" <prinzipal8@hotmail.com>
Re: [Residence Organs]  New Blower
  by "David Scribner" <david@blackiris.com>
Re: [Residence Organs]  New Blower
  by "Bernard C. Nordmann" <bcnordmann@cdmnet.com>
Blower boxes and etc.
  by "Larry Chace" <RLC1@etnainstruments.com>
Re: [Residence Organs]  New Blower
  by <GEU30CG@aol.com>
Re: [Residence Organs]  New Blower
  by "arpncorn" <arpncorn@davesworld.net>
 

(back) Subject: New Blower From: "Bart Kleineweber" <prinzipal8@hotmail.com> Date: Wed, 27 Dec 2000 10:43:56 -0600   Dear Fellow Listers;   I bought a used Meidinger blower from fellow list member Eric Sagmuller. It's now installed in the chamber and running the organ. I'm so pleased with the blower, it's so quiet compared to the Spencer. I can't believe I played that organ for more than a year with a Spencer sitting in the chamber right alongside the pipes! What a relief it is to have so much less noise. I guess there is no reason not to tune the = mixture now. Before I made the excuse that I couldn't hear the high pitches over the blower noise.   I would like it even quieter and want to know if any other list members = have ever built a baffle box. What materials are used and how do you design it =   so there is an intake vent? Obviously you can't put a box around the = whole thing because there would be no way for the air to get in. Yet in the picture of a baffle box in the OSI cataloque, I can't see any vent on the intake side of the box. The outside is wood, but it must be lined with = some sound absorbing material or it would actually amplify the sound. Anybody know what it is lined with? I thought I would use ceiling tile with a = high sound absorbtion rating. Any thoughts?   Sincerely,     Bart Kleineweber Chicago, IL http://www.diyapason.pipechat.org/webpages/kleineweber/ prinzipal8@hotmail.com   _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com    
(back) Subject: Re: [Residence Organs] New Blower From: "Kelvin Smith" <KelvinSmith@untraveledroad.com> Date: Wed, 27 Dec 2000 16:08:42 -0700   I built a baffle box for the small blower that I put in my console to blow the combination action. I made the box out of 3/4" wafer board and lined the insides of it with some 1" think white sterofoam that I bought at the lumberyard. On the intake side I put an extra layer of the sterofoam with = a few holes in it and then a space the air has to go through to get to another set of holes that go all the way through. I bolted the blower through the foam to the bottom of the box, which is a bad idea and I still got vibrations from the box. So I stuck a piece of carpet under the whole box and that solved that. It isn't perfectly silent, but very acceptable. Without the box the blower would have been unacceptably noisy.   The most important thing for keeping a blower silent I have learned by experience is to have no solid connection from the blower to anything = else. There should be pads underneath it and the cloth sleeve to connect to the windlines.   Kelvin   >Dear Fellow Listers; > >I bought a used Meidinger blower from fellow list member Eric Sagmuller. >It's now installed in the chamber and running the organ. I'm so pleased >with the blower, it's so quiet compared to the Spencer. >I can't believe I played that organ for more than a year with a Spencer >sitting in the chamber right alongside the pipes! What a relief it is to >have so much less noise. I guess there is no reason not to tune the = mixture >now. Before I made the excuse that I couldn't hear the high pitches over >the blower noise. > >I would like it even quieter and want to know if any other list members = have >ever built a baffle box. What materials are used and how do you design = it >so there is an intake vent? Obviously you can't put a box around the = whole >thing because there would be no way for the air to get in. Yet in the >picture of a baffle box in the OSI cataloque, I can't see any vent on the >intake side of the box. The outside is wood, but it must be lined with = some >sound absorbing material or it would actually amplify the sound. Anybody >know what it is lined with? I thought I would use ceiling tile with a = high >sound absorbtion rating. Any thoughts? > >Sincerely, > > >Bart Kleineweber >Chicago, IL >http://www.diyapason.pipechat.org/webpages/kleineweber/ >prinzipal8@hotmail.com > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com > > >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        
(back) Subject: Re: [Residence Organs] New Blower From: "Jimmy" <jrbaird@erols.com> Date: Wed, 27 Dec 2000 20:17:27 -0500   I use 1" (yellow) fibreglass, rather than the white styrofome. Seemed to work better.   Jimmy Baird  
(back) Subject: Re: [Residence Organs] New Blower From: "Eric Sagmuller" <ess4@psu.edu> Date: Wed, 27 Dec 2000 21:13:21 -0800   Hi Bart and list,   I'm glad that the blower is working nicely for you. The baffle box that I believe you're refering to in the OSI catalog is connected to the outlet = of the blower and is used to reduce turbulence. The other type of baffle box would be to place over the blower itself to help make it quieter. I'm not clear on which one you are refering to and am wondering if others may wonder to.   Thanks, Eric       At 10:43 AM 12/27/00 -0600, you wrote: >Dear Fellow Listers; > >I bought a used Meidinger blower from fellow list member Eric Sagmuller. =   >It's now installed in the chamber and running the organ. I'm so pleased >with the blower, it's so quiet compared to the Spencer. >I can't believe I played that organ for more than a year with a Spencer >sitting in the chamber right alongside the pipes! What a relief it is to =   >have so much less noise. I guess there is no reason not to tune the = mixture >now. Before I made the excuse that I couldn't hear the high pitches over =   >the blower noise. > >I would like it even quieter and want to know if any other list members = have >ever built a baffle box. What materials are used and how do you design = it >so there is an intake vent? Obviously you can't put a box around the = whole >thing because there would be no way for the air to get in. Yet in the >picture of a baffle box in the OSI cataloque, I can't see any vent on the =   >intake side of the box. The outside is wood, but it must be lined with = some >sound absorbing material or it would actually amplify the sound. Anybody =   >know what it is lined with? I thought I would use ceiling tile with a = high >sound absorbtion rating. Any thoughts? > >Sincerely, > > >Bart Kleineweber >Chicago, IL >http://www.diyapason.pipechat.org/webpages/kleineweber/ >prinzipal8@hotmail.com > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com > > >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 >    
(back) Subject: Re: [Residence Organs] New Blower From: "Bart Kleineweber" <prinzipal8@hotmail.com> Date: Wed, 27 Dec 2000 20:56:21 -0600   <html><DIV></DIV> <P>Dear Eric and List:</P> <P>Eric Sagmuller wrote:</P> <P>&gt;Hi Bart and list, </P> <DIV></DIV>&gt; <DIV></DIV>&gt;I'm glad that the blower is working nicely for you. The = baffle box that I <DIV></DIV>&gt;believe you're refering to in the OSI catalog is connected = to the outlet of <DIV></DIV>&gt;the blower and is used to reduce turbulence. The other type = of baffle box <DIV></DIV>&gt;would be to place over the blower itself to help make it = quieter. I'm not <DIV></DIV>&gt;clear on which one you are refering to and am wondering if = others may <DIV></DIV>&gt;wonder to. <DIV></DIV>&gt; <DIV>I didn't know that the one in the OSI catalog was only to be = connected to the outlet of the blower.&nbsp; I thought it fit around the = entire blower.&nbsp; I guess I would rather build a box that goes over the = entire blower.</DIV> <DIV>&nbsp;</DIV> <DIV>Sincerely</DIV> <P></P>Bart Kleineweber <BR>Chicago, IL = <BR>http://www.diyapason.pipechat.org/webpages/kleineweber/ = <BR>prinzipal8@hotmail.com <BR><br clear=3Dall><hr>Get your FREE download = of MSN Explorer at <a = href=3D"http://explorer.msn.com">http://explorer.msn.com</a><br></p></html>=    
(back) Subject: Re: [Residence Organs] New Blower From: "David Scribner" <david@blackiris.com> Date: Wed, 27 Dec 2000 21:10:38 -0600   Bart   We have a blower box at the shop that I will look at, if i can find it, and take some photos of to send to you once I get to the shop, hopefully tomorrow. It was built by the company that made the blower, I think and as i remember, is made out of 3/4" material that is lined with foam - not smooth foam but the stuff that has the "peaks" to it, like the inside of an egg crate. There is a "baffled" inlet to keep the sound down.   Also important to keep noise down is the use of a wind sleeve between the outlet and the rest of wind trunk. There are usually made out of rubber cloth and do help to cut down on the amount of sound transmitted from the blower.   Hope this helps   David  
(back) Subject: Re: [Residence Organs] New Blower From: "Bernard C. Nordmann" <bcnordmann@cdmnet.com> Date: Wed, 27 Dec 2000 21:22:44 -0600   At 10:43 AM 12/27/00 -0600, you wrote: >Dear Fellow Listers; > >I bought a used Meidinger blower from fellow list member Eric Sagmuller. >...I would like it even quieter and want to know if any other list = members >have ever built a baffle box. What materials are used and how do you >design it so there is an intake vent? Obviously you can't put a box >around the whole thing because there would be no way for the air to get = in.   Oh yes you can put a box around the whole thing. I have a customer with a = 6 rank Wicks using a Meidinger blower in a plywood box lined with ??? (oh great, I can't think of the cardboard like wall covering which was popular =   during the rationing of WW2 and is used in model railroading for roadbed). =   It's much quieter, it doesn't seem to get very warm. (I haven't checked = the blower size against what would normally be speced, but it's not big at = all.)   > . . . I can't see any vent on the intake side of the box.   The one I'm referring to has an inward hinged-at-the-top "door" for air admission.   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Bernie Nordmann, St. Louis, MO -- Owner of a 3/13 Wurlitzer/Barton/Kimball/Dennison/whatever -- Registered Piano Technician, Piano Technicians Guild -- Full time computer consultant - Nordmann Consulting, Inc. -- Amateur radio operator, call sign KV0W -- Husband, father ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~    
(back) Subject: Blower boxes and etc. From: "Larry Chace" <RLC1@etnainstruments.com> Date: Wed, 27 Dec 2000 22:52:12 -0500   It was good to hear of Bart Kleineweber's good results with his "new" Meidinger blower. The (Swiss) Meidinger and (German) Ventus blowers are amazing for their quietness, something perhaps purchased at great cost (originally) due to the amount of attention and "tuning" given to each = unit.   Enclosures surrounding the blower have been produced by several companies, including Spencer (for their small Orgoblo Juniors), BOBCO (British Organ Blower Company), and Laukhuff (for the Ventus blowers). The Spencer unit = I once had was lined with "acoustic tile" material and did help reduce the emitted sound levels. Perhaps the most important item was the intake flap that was closed whe no air was being delivered (and the organ was = therefore silent). As air was consumed, the flap would open, but the organ would also get louder, neatly "covering" the increased blower noise. You can build a box with a simple hinged flap that closes by gravity but open easily when air is needed.   The "after blower" baffle boxes mentioned in a recent note are typically lined with thick felt (perhaps 3/8" thick?) and include several bends and turns. The goal is to "quiet" the wind, reducing the turbulance resulting from the whirling impeller, rather than the external noise of the blower.   Carpets used to be installed over a thick felt layer, but that has been superseeded by foam rubber pads, and so the felt seems to no longer be available locally. Organ Supply does sell it, but its price corresponds = to its quality.   Thick rubber pads under the blower, to reduce the transmission of vibrations, have also been mentioned -- they are a simple and inexpensive method of making the machines more silent.   In the theatre organ world, some folks install a piece of carpeting upside-down over the valves (think Wurlitzer regulators!), letting them flap as air is drawn. This, too, helps to cut down on turbulance. = Another suggested technique is to use (wooden) wind trunks that taper, getting slightly narrower at the "output" end.   Yet another approach to quieting the blower is to use the variable speed drive offered by Laukhuff. It monitors the blower load (by watching the current) and will slow the blower when little demand is being made, speeding it up when wind is drawn. This is done by producing variable frequency AC, and it also requires a sufficient reservoir to meet the wind demand while the blower speeds up. I don't know what those devices cost.   Larry Chace      
(back) Subject: Re: [Residence Organs] New Blower From: <GEU30CG@aol.com> Date: Wed, 27 Dec 2000 22:52:51 EST   Is the word "Homasote"?   Darren Ferreter Theatre Organs and HO Model Railroader   In a message dated 12/27/00 9:24:53 PM Central Standard Time, bcnordmann@cdmnet.com writes:   << Oh yes you can put a box around the whole thing. I have a customer with a = 6 rank Wicks using a Meidinger blower in a plywood box lined with ??? (oh great, I can't think of the cardboard like wall covering which was = popular during the rationing of WW2 and is used in model railroading for = roadbed). It's much quieter, it doesn't seem to get very warm. (I haven't checked = the blower size against what would normally be speced, but it's not big at = all.) >>  
(back) Subject: Re: [Residence Organs] New Blower From: "arpncorn" <arpncorn@davesworld.net> Date: Wed, 27 Dec 2000 23:16:27 -0600   On Wed, 27 Dec 2000 22:52:51 EST Darren Ferreter, <GEU30CG@aol.com> wrote to the Residence Organ List <DIYAPASON-L@pipechat.org>   >Is the word "Homasote"?     Nope.   Beaverboard!   Faithfully,   "Arp in the Corn Patch"