DIYAPASON-L Digest #298 - Wednesday, April 11, 2001
 
Re: [Residence Organs]  making new rackboards
  by "Leah Smith" <gregsmithandleah@earthlink.net>
Diodes and electrical noise - results
  by <JFick@aol.com>
Re: [Residence Organs]  making new rackboards
  by "John Vanderlee" <jovanderlee@vassar.edu>
Re: [Residence Organs]  making new rackboards
  by <Pipewheezr@aol.com>
Re: [Residence Organs] Racking Reamers
  by "Richard Schneider, President" <arpncorn@davesworld.net>
 

(back) Subject: Re: [Residence Organs] making new rackboards From: "Leah Smith" <gregsmithandleah@earthlink.net> Date: Tue, 10 Apr 2001 21:32:23 -0700   Hello..and thanks a Billion for the wonderful piece of info. I have to = create some new boards for my seven rank wurli chest I just got. I would love = to see the "C"clamp device on your jpeg photo if possible. I would love to try = to make one. Where are you located? I live in Claremont . CA. Hope to hear from = you. All the best, and Thanks again for sharing this piece of priceless = knowledge. Greg   TheGluePot@aol.com wrote:   > > on the subject of rackboards, I have to make four new rackboards. = Cutting > > the boards to the right final size, and planing them to the original > > thickness is no problem. But.....What is the best way to insure that = each > > hole in the board is centered over the toe hole? > > Help! > > JOhn Durgan > > Mississippi > > Hello John and fellow Pipe Organ Owners: > > Many good suggestions were offered by previous posts. My suggestions = may not > be better, just different. > > During my apprenticeship we were taught to make our own tools. One of = the > best tools to make is a "Toe Hole Center Finder." I've loaned mine out = but > attached is a JPEG of Ron Downer's. It is a giant "C" clamp type of = device > that lets a centering cone drop into the topboard toehole. Positioned > directly above on the other arm of the jig is a pointed punch marker. = With > the blank rackboard in place and the Finder over the selected hole, you = push > the punch down to make a center hole in the virgin rackboard. Now you = have a > vertically aligned center line for drilling. With pipes it is EXTREMELY > important to have them truly vertical as some soft high tin content = pipes and > soft lead pipes will fold over with time and gravity. > > Holes are best reamed and sanded in place with a slight taper. I made a = dust > catcher out of a PVC pipe "T" that goes under the hole being worked on = and > then to my shop vac. Tapered sanding drums made on a wood lathe then = covered > with sand paper held on with rubber cement can make a hole nicely = finished. > Don't forget to put a little shellac around the hole to seal the wood as > moisture that gathers can "sugar" a pipe foot. > > Randy Bergum has a rackboard jig for figuring sizes on the WEB someplace = in > an ATOS/chapter site but I cannot remember where at the moment. > > All three jig appeared in the ATOS publication *The Glue Pot* which is > supposed to be resurrected since I left as editor. I currently don't = have > the issues before me. As for the centering jig, I will attach a photo = JPEG > to see if the Residence Organs server will pass it along. > > On new chests that I make I have a CNC vertical mill programmed to make = 61 > holes in both the topboard and the rackboard in under 5 minutes. All = are > perfectly aligned to a thousandth of an inch. I would never go back to = doing > it manually unless it is an old chest that needs a new rackboard. Then > manual ways are faster than measuring and programming. > > One last thought, if doing the holes manually, masking tape across the = bottom > of the rackboard will keep drills from taking out chips and splinters = but a > clamped scrap backer board is better. Then the holes are clean and > professional. > > Best to everyone, > > Al Sefl > > PS: Second try, apparently the server won't pass an attachment so if = you > want a picture of the centering jig just e-mail me directly. > > 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: Diodes and electrical noise - results From: <JFick@aol.com> Date: Wed, 11 Apr 2001 08:12:59 EDT   A few weeks ago there was some discussion regarding the use of diodes = across coils in pipe organs and thoughts about appropriate placement of = such diodes. My own scenario had console-to-chest cables lying parallel = to PA system microphone cables for approximately 80 feet and I wanted to = be sure that there was no noise induced in the PA system.   Here's the result: there is absolutely no noise induced in the PA system, = and all contact arcing is gone as well.   To go a step further along the line of "measurements" I noticed while = playing the organ during a break in the worship service that it was = difficult to hear any kind of useful feedback from the organ over the din = of talking; I couldn't hear pitch! The need for a console monitor speaker = became quite evident. Although I will eventually place a monitor = amplifier in the pipe room and run speaker levels (volts) to the console = through a spare twisted pair in the 120 foot organ cable, I chose for = Easter to try the quickest thing possible: run *microphone levels* = (millivolts from a 150 ohm Electret mic element) through the organ cable = to the console where the temporary amplifier and speaker are located. = Result? Surprisingly, noise was not even induced into the mic in that = sensitive scenario. (For the electrically inclined, telephone = twisted-pair cable is a pretty good transmission line IF it stays twisted. = In our scenario there are three places where the twist is discontinuous: = 1! ) at the pipe room punch block, 2) at the 50-conductor cable connectors, and 3) at the console punch = block. Such discontinuities introduce the potential for interference, but = apparently in our situation aren't a problem. The one unknown is RFI from = localized itinerant communications sources...left to be seen.)   Diodes do work as expected!   Jon Fick Westford, Vermont  
(back) Subject: Re: [Residence Organs] making new rackboards From: "John Vanderlee" <jovanderlee@vassar.edu> Date: Wed, 11 Apr 2001 08:48:28 -0400   yone, > >Al Sefl > >PS: Second try, apparently the server won't pass an attachment so if you >want a picture of the centering jig just e-mail me directly.   Please do and Thanks!   JV      
(back) Subject: Re: [Residence Organs] making new rackboards From: <Pipewheezr@aol.com> Date: Wed, 11 Apr 2001 10:51:30 EDT     --part1_dc.49ec5ed.2805c972_boundary Content-Type: text/plain; charset=3D"US-ASCII" Content-Transfer-Encoding: 7bit   Hi again, I have found that the heavy paper that they line halls with at construction sites works well for patterns. It is sold at Home Depot. I = have put the pipes on there heads down on the paper and trace the out side then =   find the center. You can see how much room your useing.I have 4 rolls of patterns of chests done this way.Every part you make of the chest you = check it against the previous part. I have a CNC milling machine but the table is only 4' long, other wise you =   can guess where I would be making these chest's! Have fun Dennis   --part1_dc.49ec5ed.2805c972_boundary Content-Type: text/html; charset=3D"US-ASCII" Content-Transfer-Encoding: 7bit   <HTML><FONT FACE=3Darial,helvetica><FONT SIZE=3D2>Hi again, I have found = that the heavy paper that they line halls with at <BR>construction sites works well for patterns. It is sold at Home Depot. = I have <BR>put the pipes on there heads down on the paper and trace the out side = then <BR>find the center. You can see how much room your useing.I have 4 rolls = of <BR>patterns of chests done this way.Every part you make of the chest you = check <BR>it against the previous part. <BR>I have a CNC milling machine but the table is only 4' long, other wise = you <BR>can guess where I would be making these chest's! <BR>Have fun <BR>Dennis</FONT></HTML>   --part1_dc.49ec5ed.2805c972_boundary--  
(back) Subject: Re: [Residence Organs] Racking Reamers From: "Richard Schneider, President" <arpncorn@davesworld.net> Date: Wed, 11 Apr 2001 19:15:40 -0500   David Scribner wrote: > At the shop we use a set of tapered reamers to fit pipes to the rack > boards. Our set is in 4 different sizes so that we can get a good > fit. <snip> I have no idea of how much a set > of these tapered reamers, or even individual reamers would cost. The > set we have are all on long shafts and fit on a drill.   I would be curious about those, in that we've been trying for quite some time to obtain a set of these ourselves. I have copies of a set of Racking Reamers that were designed by Jan Rowland, I believe. I had contacted him about making us a set but he is no longer in a position to do this. I'm wondering if the Nichols & Simpson set came from when Jan was making these for various folks?   I've been talking with various Machine Shops about the possibility of making a set of these, because I know that besides our own needs, there are many folks who would like to have some also.   Question: are there any machinists who have access to the kind of machine tools that it would take to make cutting tools? If you're interested in such a project, please contact me privately about the possibility of collaboration on a project of making these cutters available once again.   However, my schedule is such that I will not have time to scan any drawings before next week, since this is Holy (Hell??) Week!!   Failing any interest on the part of anyone who has a Machine Shop, I'll once again take up the cause of going "cold prospecting" in order to find a local Machine Shop who will manufacture these at a reasonable cost. However, costs in the neighborhood of $1,000.00 for a set of 4 would not at all surprise me, especially if they are fitted with carbide cutter insert bits. Faithfully,   "Grandpa Arp in the Corn Patch" Richard Schneider, PRES/CEO SCHNEIDER PIPE ORGANS, Inc. Organbuilders 41-43 Johnston St. P. O. Box 137 Kenney, IL 61749-0137 (217) 944-2454 VOX (217) 944-2527 FAX arp@schneiderpipeorgans.com Business EMAIL rnjs@bwsys.net Personal EMAIL http://www.schneiderpipeorgans.com Web Page URL