DIYAPASON-L Digest #279 - Monday, March 12, 2001
 
RE: combination action
  by "Dave McClellan" <drmc@speedfactory.net>
Re: Wind Conductor Sizing Question
  by "Dave McClellan" <drmc@speedfactory.net>
[Residence Organs]  Re: Wind Conductor Sizing Question
  by "Eric Sagmuller" <ess4@psu.edu>
Re: [Residence Organs]  RE: combination action
  by "Jon C. Habermaas" <opus1100@catoe.org>
[Residence Organs]  Blower Capacity
  by "william baron" <bourdon_8@yahoo.com>
Re: [Residence Organs]  Blower Capacity
  by "Hugh Knapton" <knapton@superaje.com>
 

(back) Subject: RE: combination action From: "Dave McClellan" <drmc@speedfactory.net> Date: Mon, 12 Mar 2001 07:38:48 -0500   Steve Pitts asked:   "I have heard of the term "Combination Action" ? I have heard of a = switching mechanism which has 61 power transistors..one for each note of a manual or 32 for a pedal board ) the transistors drive the direct electric or EP magnets.What is this mechanism called?"   I think this would be called a relay. I use one of these in my residence instrument. It was manufactured by Wicks. These appear to have been used in cases where the stop switching is external to the console. Consoles = used with such a relay would have keys with multiple contacts (or slider rails) which are connected through gang switches in the console for coupler switching. The output of the console is (in my case):   o Great Main out (61) o Swell Main out (61) o Pedal Main out (32) o Stop switches (one per tab)   These connect to the relay, which consists of the power transistor amplifiers Steve mentioned, followed by a series of diode-isolated gang switches (for unit or borrowed stops) or common return relays (one = contact) for straight stops (diode isolation is still required even for straight stops). It is very simple to expand such a relay by adding additional diode-isolated gang switches (up to a limit, of course).   I have also seen a totally electro-mechanical form of such a relay which uses a keying relay for each key on all manuals and pedal. The keying = relay has many contacts that again feed into gang switches which do the stop switching. The advantage of this form of relay is that no diode isolation is required. But it gets complex when you run out of contacts on the = keying relay. Thus this form of relay is not as easy to expand.   Of course all of this is moot if you are willing to invest in a = computerized electronic relay (I could not afford it).   Steve was concerned about the ability to expand an instrument. I learned the hard way that in my case the CONSOLE was the limiting factor, as some people on the list have stated. You need to make sure you will have = enough stop and coupler controls to meet your ultimate needs. I was forced to replace my original console because it did not have enough tabs (and had = NO couplers). Some will argue that virtually any console can be upgraded and = a new stoprail or stop jambs fabricated. While this may be theoretically true, my investigation found that buying a larger replacement console was much cheaper (especially if available locally).   I would look for an instrument with coupler switching in the console, and thus the stop action switching external to the console in the form of a relay. That way you may possibly be able to expand the relay (as I did), depending of course on its construction.   Dave    
(back) Subject: Re: Wind Conductor Sizing Question From: "Dave McClellan" <drmc@speedfactory.net> Date: Mon, 12 Mar 2001 08:34:28 -0500   Eric Sagmuller mentioned an "Online Spencer Manual". Where is that found? I checked the Spencer Turbine Company web site, but did not find it.   The Zephyr blower is similar in construction to the Spencers (two 26" = fans, 1165 RPM Century motor). There was no specification on the name plate. I asked Schantz, but they said they did not have the specification for the older models.   Al Sefl was able to give me the formulas to estimate the capacity in CFM = and the static pressure. His estimates were 8" static and 931 CFM. This weekend I measured the static at 7.75" - pretty close considering he used Spencer Coefficient of Discharge number! My instrument will need about = 750 CFM max at 3.75". The console needs 7-10" (static) according to Schantz. Today, I am running the entire instrument on a 1/4 hp B.O.B. Co blower through a 6" wind line.   The outlet diameter is 12". I really need to use a much smaller diameter wind line than that.   Dave          
(back) Subject: [Residence Organs] Re: Wind Conductor Sizing Question From: "Eric Sagmuller" <ess4@psu.edu> Date: Mon, 12 Mar 2001 08:49:43 -0500   At 8:34 AM -0500 3/12/01, Dave McClellan wrote: >Eric Sagmuller mentioned an "Online Spencer Manual". Where is that = found? >I checked the Spencer Turbine Company web site, but did not find it. >   Dave and others,   Here's the URL.   http://barton.theatreorgans.com/orgoblo.htm   Eric    
(back) Subject: Re: [Residence Organs] RE: combination action From: "Jon C. Habermaas" <opus1100@catoe.org> Date: Mon, 12 Mar 2001 08:23:43 -0600   At 07:38 AM 3/12/01 -0500, you wrote: >Steve Pitts asked: > >"I have heard of the term "Combination Action" ? I have heard of a = switching >mechanism which has 61 power transistors..one for each note of a manual >or 32 for a pedal board ) the transistors drive the direct electric or EP >magnets.What is this mechanism called?" "Combination Action" is the term used for the mechanism used for = switching stops through the use of pistons or toe studs on the console. In pipe organs it can be either = all mechanical, electro-pnuematic or all electric depending on the builder's preference and type of action used for the organ. It is not that commonly used on electronic instruments except those large concert instruments and organ which emulate pipe organ construction. The term combination refers to the setting of combinations of stops through a single action.   Jon    
(back) Subject: [Residence Organs] Blower Capacity From: "william baron" <bourdon_8@yahoo.com> Date: Mon, 12 Mar 2001 08:13:13 -0800 (PST)   Hello all.   I have a relatively simple question I'm sure someone will have no problem answering.   I'm wondering what my Kinetic Blower is capable of.   It has a 3/4 hp Single Phase Century Motor and produces 400 cfm at 5" pressure. In a typical residential installation, how many ranks would this be capable of providing wind for?   Thanks, Bill Baron   __________________________________________________ Do You Yahoo!? Yahoo! Auctions - Buy the things you want at great prices. http://auctions.yahoo.com/  
(back) Subject: Re: [Residence Organs] Blower Capacity From: "Hugh Knapton" <knapton@superaje.com> Date: Mon, 12 Mar 2001 18:50:09 -0500   Not quite that simple! ... what pressure do these ranks use/require and are they straight or unified?... what type of action and voicing are used? Without knowing what a "typical residential installation" is!.... I calculate that that blower could support anywhere from 8 to 46.765 ranks!   More detail would help.   Hugh   >Hello all. > >I have a relatively simple question I'm sure someone >will have no problem answering. > >I'm wondering what my Kinetic Blower is capable of. > >It has a 3/4 hp Single Phase Century Motor and >produces 400 cfm at 5" pressure. In a typical >residential installation, how many ranks would this be >capable of providing wind for? > >Thanks, >Bill Baron > >__________________________________________________ >Do You Yahoo!? >Yahoo! Auctions - Buy the things you want at great prices. >http://auctions.yahoo.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