DIYAPASON-L Digest #47 - Monday, February 28, 2000
 
my organ
  by "Robert  Eversman" <highnote@mhtc.net>
Re: [Residence Organs] Mixture Chest
  by "Bart Kleineweber" <prinzipal8@hotmail.com>
Re: [Residence Organs]  Re: [Residence Organs] Mixture Chest
  by "Larry Chace" <RLC1@etnainstruments.com>
Re: [Residence Organs]  Re: [Residence Organs] Mixture Chest
  by <GRSCoLVR@aol.com>
Re: [Residence Organs]  Re: [Residence Organs] Mixture Chest
  by "Tom Dimock" <tad1@cornell.edu>
 

(back) Subject: my organ From: "Robert Eversman" <highnote@mhtc.net> Date: Mon, 28 Feb 2000 06:55:27 -0600   Just to bring you up to speed. Until now I have had only one 8' flute working as a direct hook up to the lower manual and pedal. I have had much difficulty with finding relays etc. After 24 hours of pulling hair and scraping teeth I managed to get my SSL pedal relay to work with my much older Wicks electro mech. relays.   Progress? Depends on how you look at it. As of now I have exactly what I did before except now it is all going through the relays.   I should have the 16' pedal working by tomorrow. Things are finally starting to happen thanks to the help of very very good and PATIENT = friends Tim Bovard and David Scribner. Take a bow guys !!!   I broke the champagne over the console last night. My first project of today is to clean all that up. Of course not even a tent in the Hinners console !   Happy in Wisc. Robert Eversman  
(back) Subject: Re: [Residence Organs] Mixture Chest From: "Bart Kleineweber" <prinzipal8@hotmail.com> Date: Mon, 28 Feb 2000 16:44:28 CST   Hi list:   I was preparing to wire a Mixture III chest to a pipe driver and thought I =   should test it before cutting and lacing the wires. I discovered 4 notes that suddenly do not work, they worked before when I first got the chest, winded it and tuned the pipes. I haven't tried it since then, I think it was in November. It's a small unit chest that only plays the mixture III. = The chest is electro-mechanical, and when I took it apart (this was when I =   first got the chest) and looked inside they were all Reisner 601 forty ohm =   magnets with 1" valves. By the way, they all worked with the chest taken apart, too. The organ is on 3-1/2" of wind. When I apply an ohmeter to = the control wire and common, they all register around 40 ohms (both the non-working and working control wires measure the same). A small spark is =   visible from both the working and non-working control wires upon contact with the hot wire.   What's going on and can I fix it without taking all 183 pipes out and = taking the chest apart?   Bart Kleineweber Chicago, IL prinzipal8@hotmail.com ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com    
(back) Subject: Re: [Residence Organs] Re: [Residence Organs] Mixture Chest From: "Larry Chace" <RLC1@etnainstruments.com> Date: Mon, 28 Feb 2000 19:19:41 -0500   Bart Kleineweber <prinzipal8@hotmail.com> asked about a chest that has suddenly developed some non-working notes.   The number of non-working notes is proprotional to the difficulty of accessing the chest action! I saw this recently when visiting an instrument with a failing note on a bass chest. That chest had a front panel that was removable, but immediately in front of the chest was = another chest, containing an 85-note 3-rank mixture. It was *impossible* to = remove the failing chest's access panel without first removing all 255 pipes of the mixture and its chest. Bad design!   Seriously, it is possible that a few of the electric valve units were adjusted marginally, such that they worked fine under previous conditions (temperature? humidity? phase of the mood?) but now are no longer quite able to open.   The magnets need to be adjusted to have proper alignment of the armature and swinging arm, usually a very small overlap in the non-operating condition. With wind, the valves must open against pressure, and valves that will work fine on bench will sometimes fail in use. If the chest in fact worked fine before, as Bart mentioned, then perhaps the problem can = be ascribed to "maginality". His tests show that the magnet is getting energized. A simple test might be to fire the magnets with the wind = turned off. If you can hear the valves working, then you can feel confident that they need to be adjusted with a little bit more overlap in the rest position, so that they have a little bit more magnetic pull to counteract the effect of wind pressure.   Another, more insidious, problem might be a finish on the bottom of the = toe boards that has gotten sufficiently "sticky" that some of the valves are, well, *sticking*!   Good luck, Bart, and please let us know what you discover!   Larry            
(back) Subject: Re: [Residence Organs] Re: [Residence Organs] Mixture Chest From: <GRSCoLVR@aol.com> Date: Mon, 28 Feb 2000 19:59:51 EST   Bart-----Heres another 2 cents worth. check your wind pressure to make sure it has not changed upwards Check your power supply/generator to make sure its around 10-12 vdc Regards, ---Roc  
(back) Subject: Re: [Residence Organs] Re: [Residence Organs] Mixture Chest From: "Tom Dimock" <tad1@cornell.edu> Date: Mon, 28 Feb 2000 20:13:43 -0500   At 04:44 PM 2/28/00 CST, Bart wrote: >What's going on and can I fix it without taking all 183 pipes out and = taking >the chest apart?   Larry gave his usual thoughtful reply, and if you do end up having to dismantle the chest, his advice is going to be valuable to you. (Larry is a good freind and has helped me enormously with my organ) But what I = would do in your case is with the chest under pressure and the magnet powered, remove one of the afflicted pipes and use a small probe to poke down into the chest and "help" the valve to open. Will the magnet keep it open? If not, proceed to dismantling. No depower the magnet and then repower it. Does the valve work? If so, rejoice and move on to the next stuck valve. If not, try pushing the valve open without wind or magnet. If you can = feel resistance that suddenly gives way, the valve may be sticking to the = board. You may be able to resolve this by sprinkling a little talcum powder in (this may be total heresy - I'm no expert on organs, but do have a pretty extensive background in player pianos, where talcum is frequently used for this purpose). With a lot of luck you may be able to un-stick the valves without dismantling. Of course all of this advice is useless if there is any offset between the valve and the toehole.....