DIYAPASON-L Digest #25 - Wednesday, February 2, 2000
 
Re: One more reason for burning toe holes.......
  by <TheGluePot@aol.com>
Re:  Vox Boots!
  by <TheGluePot@aol.com>
Re:  Vox Boots!
  by "Larry Chace" <rlc1@etnainstruments.com>
Re: [Residence Organs]  Re:  Vox Boots!
  by "Kelvin Smith" <KelvinSmith@untraveledroad.com>
Re: [Residence Organs]  Re:  Vox Boots!
  by "Bob Loesch" <rrloesch@jps.net>
Reeds and questions and other pipes
  by "John Vanderlee" <jovanderlee@vassar.edu>
Re: [Residence Organs]  Reeds and questions and other pipes
  by "Larry Chace" <rlc1@etnainstruments.com>
Vox(es)
  by <KriderSM@aol.com>
Vox Humana
  by <KriderSM@aol.com>
 

(back) Subject: Re: One more reason for burning toe holes....... From: <TheGluePot@aol.com> Date: Wed, 2 Feb 2000 01:19:42 EST   Haven't seen this mentioned, if it has been sorry:   Too often the chamfer bit used will wobble ever so slightly when making a = toe hole. Not only does the burning seal the wood, the turning object makes = the hole more perfectly round for a good seal between the toe hole and the = toe. I use a numerical control vertical mill to make the repetative holes in = the toe board then go back and burn them in with an abrasive bit that is = allowed to "gum up."   Al Sefl Sniffing burning poplar for 40+ years.........  
(back) Subject: Re: Vox Boots! From: <TheGluePot@aol.com> Date: Wed, 2 Feb 2000 02:11:17 EST   > The *1st* -- A Vox has what's termed a "fractional length" resonator = (i.e. > 8' C is approx 2' long, or 1/4 the "normal" length). In reeds of this > type, unusual phenomenon can occur with the occasional pipe, when the > volume of the resonator is too close to the volume of the boot. The end > result of this phenomenon is an odd pipe or two that just WILL NOT = behave > (won't speak right...won't tune...won't stay in tune for over 5 > minutes...etc). The solution to this problem -- make the boots too = big!! > I think the term for this is "acoustic coupling"...but don't quote me on > that. (is there a physicist on the List???) > Cheers! > Tim Bovard > Nichols & Simpson, Inc. > (who just LOVES a good Vox, and already has the one that will eventually = go > into *my* house organ!!) >>   Hello Tim:   What is happening is that the boot is acting just like a resonator. The = reed actually puts out pulses of air into the resonator and into the boot. If = the boot is at C# while the reed is at C then the reed may be "pulled" into = pitch by the boot. The Vox is a regal with a vowel cavity on top, NOT a = resonator and if measured not a fractional resonator either. So if the boot is = quite near the pitch of the reed, the reed will be pulled. Us old timers have sometimes just cut the boot down a touch and the pipe then lets pitch = control go back to the reed tongue. I have seen holes punched through Vox boots = but this is not considered good organ work. When you get into the higher pressures and stronger springiness of the theatre organ reed tongues the boots can all be the same length with no interference bothering the reed pitch.   Best wishes to you Tim, and to the list,   Al Sefl Building Organs and teaching Physics and Chemistry on the side.  
(back) Subject: Re: Vox Boots! From: "Larry Chace" <rlc1@etnainstruments.com> Date: Wed, 02 Feb 2000 10:07:04 -0500   Another approach to de-resonating the Vox Humana boots is to drop a small block of wood into the boot, one that will jamb itself part-way down. = That can break up the resonance and it avoids the interesting visual effect of having one or two extra-long boots.   The question of holes in the boots is also interesting. The 16' Trumpet resonators I recently got came with a few (!) of the bottom-end assemblies. This was an Austin set, apparently from opus #600, the 4/79 organ for the residence of John T. Austin, where I believe it might have been a Swell 16' Posaune. Anyway, the pipes are very solidly made, the blocks have nice brass wedges, and the boots have a ring of pipemetal soldered inside, perhaps to give the blocks a "softer" surface to contact than the very heavy zinc boot bodies. Anyway, anyway, a few of the boots have 1/8" holes neatly drilled in the back near the bottom. This appears to have been original work.   Larry Chace  
(back) Subject: Re: [Residence Organs] Re: Vox Boots! From: "Kelvin Smith" <KelvinSmith@untraveledroad.com> Date: Wed, 2 Feb 2000 10:15:33 -0500   The boots of Austin reeds, as far as I've seen, often if not always have a hole in them. My tuba set has them. I can't remember how high up the compass they go.   Kelvin   >Another approach to de-resonating the Vox Humana boots is to drop a small >block of wood into the boot, one that will jamb itself part-way down. = That >can break up the resonance and it avoids the interesting visual effect of >having one or two extra-long boots. > >The question of holes in the boots is also interesting. The 16' Trumpet >resonators I recently got came with a few (!) of the bottom-end >assemblies. This was an Austin set, apparently from opus #600, the 4/79 >organ for the residence of John T. Austin, where I believe it might have >been a Swell 16' Posaune. Anyway, the pipes are very solidly made, the >blocks have nice brass wedges, and the boots have a ring of pipemetal >soldered inside, perhaps to give the blocks a "softer" surface to contact >than the very heavy zinc boot bodies. Anyway, anyway, a few of the boots >have 1/8" holes neatly drilled in the back near the bottom. This appears >to have been original work. > >Larry Chace > >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] Re: Vox Boots! From: "Bob Loesch" <rrloesch@jps.net> Date: Wed, 02 Feb 2000 07:27:08 -0800   At 10:07 AM 02/02/2000 -0500, Larry Chace wrote: >Anyway, anyway, a few of the boots >have 1/8" holes neatly drilled in the back near the bottom. This appears =   >to have been original work.     I've seen that done to overcome leaky valves. The hole relieves leaked-in pressure and keeps the pipe from murmuring.   Regards,   Bob, in beautiful Lake County, California, USA   http://www.jps.net/rrloesch   Time flies whether you're having fun or not!   The best things in life aren't THINGS.  
(back) Subject: Reeds and questions and other pipes From: "John Vanderlee" <jovanderlee@vassar.edu> Date: Wed, 02 Feb 2000 10:45:57 -0500   Dear List,   What is the numbering convention on a rank of pipes?   Does "1" start with "CCC" (16')? then what would 32' be?   Next question: A rank of Tubas recently obtained (might be Wurlitzer) starts at 16' and is marked "TU" with the pitch stamped below it. Also a 3 digit number is engraved on them "434"   At about F# in the 8' section "har" is added under the "TU" which I assume is harmonic, and that continues all the way up to the 1' I seem to recall that some reeds reeds tune to a harmonic combined with = the resonator length to obtain the pitch, or (and I don't think so) do I have two sets mixed up?   Next, although these look like Wurli, they do not have a brass sleeve on their tuning wire. Did Wurlitzer produce any like that ever? Or perhaps it is not Wurlitzer.   Lastly,   Although we have all the 16' boots (the ones that look like a tin can with leather around the top rim where the block fits in) half of the 16' resonators are missing. We do however have a nice set of Robert morton Resonators and although it appears that their toes would sit nicely on top of the above blocks, yet the scale of the RM resonators is considerably larger. I would appreciate any and all thoughts on this.   Thanks in advance!   John V      
(back) Subject: Re: [Residence Organs] Reeds and questions and other pipes From: "Larry Chace" <rlc1@etnainstruments.com> Date: Wed, 02 Feb 2000 11:05:13 -0500   John Vanderlee asked about some reed pipes that came his way. I'd suggest =   the following:   1. Pipe #1 is simply the first pipe of the rank, no matter what its pitch might be. Those numbers, if even present, are just a guide to the installer and to other folks. Many ranks are not numbered at all but are instead marked with the pitch letter; you have to figure out the proper order based upon the pipe dimensions. When a reed goes harmonic (and the resonator suddenly gets about twice as long as normal), you can get confused, so you might have to check the shallots, which will still be graduated in a normal fashion.   2. The Wurlitzer Tuba is marked "TU" for Tuba and the "434" is probably = the pitch (435?) at which it was voiced. (But, did Wurlitzer do that???) As far as I know, Wurlitzer did not mark the pipes with opus numbers since they often built pipes ahead of time, placing them into storage until the pipes were needed. (That is to say, most Wurlitzer pipe organs are really =   "parts" organs, with the parts coming from the factory's storage areas!)   3. The marking "har" is the convenient hint that the pipes have gone harmonic. In effect, they are "overblowing" to their first overtone, an octave higher than the resonator would suggest (but the tongues and shallots are normal).   4. The missing brass sleeve around the tuning wire, coupled with the "434" =   designation *SUGGESTS* that this might not be a Wurlitzer rank after all. I'm pretty sure that E. M. Skinner used the "har" notation on the pipes when a rank became harmonic. It might be Skinner or from another = firm.   5. Whether or not the 16' boots will work with the Robert-Morton 16' Tuba resonators is simply a matter of trying it! You'll need a good wind = supply of adequte pressure (but not someone's mouth!); maybe even a Shop-Vac = (dare I suggest it?) might work if nothing else is available. It may well be that "cosmic forces" have been at work, causing the "orphaned" boots to show up to match with your "orphaned" resonators!   Happy fun times with reed pipes!   Larry Chace  
(back) Subject: Vox(es) From: <KriderSM@aol.com> Date: Wed, 2 Feb 2000 19:40:06 EST   Our organ (Wurlitzer) came with two voxes. One served as the echo rank = when it was originally installed in the theatre. Now, one vox is in the Main Chamber and the other is in the Solo.   I like the two voxes playing together, sometimes tremmed, but often not. = They are usually very slightly out of tune from each other, which gives a nice celeste sound when heard in the room.   Stan Krider   Kelvin recently wrote: <snip> I do not have a separate tremulant for the vox on my organ. The chest came   with a weight which I assumed was for a tremulant, but there was nothing   else to go with it. So at least for starters I am planning to just hook it   up with no trem except the trem for the whole swell division. This would   give me the option to use the vox as a regal if I found occasion to do so.   I have yet to find out just how this will turn out.      
(back) Subject: Vox Humana From: <KriderSM@aol.com> Date: Wed, 2 Feb 2000 19:44:30 EST   I've seen vox ranks totally enclosed in a separate cramped box which is opened only to tune the thing.   ....or "Voix Migraine"?   Stan Krider   Ron Rarick observed:   Some things I have heard could vie for the title of "Voix Inhumaine."     Later,