DIYAPASON-L Digest #467 - Thursday, December 20, 2001
 
Re: DIYAPASON-L Digest #466 - 12/19/01
  by "Tony Newnham" <organist@tsnp.fsnet.co.uk>
Organ Winding Questions
  by "Dave McClellan" <deep_tremolo@hotmail.com>
Re: [Residence Organs]  tuning frequencies
  by "Ron Natalie" <ron@sensor.com>
 

(back) Subject: Re: DIYAPASON-L Digest #466 - 12/19/01 From: "Tony Newnham" <organist@tsnp.fsnet.co.uk> Date: Thu, 20 Dec 2001 10:59:33 -0000   Hi all       On Wed, 19 Dec 2001 22:22:21 +1300 you said:-   "So, this probably the only organ around that has an enclosed Great and unenclosed Swell."   That's not actually true - I came across one in Willburton Baptist Church, Cambridgeshire, UK a few weeks ago. It looks like a similar situation, where a 1m has been extended. In that case, the 2nd manual is an = unenlcosed Lieblich Gedackt rank on a chest at the back of the organ, behind the = swell box. Pipes available at 8,4,2 2/3 & 2 ft pitches if I remember correctly. The extra stops are controlled by stop keys, whilst the original part of = the organ is drawstops and tracker action. There are no couplers whatsoever = to the 2nd manual. For a full spec. see the NPOR register under index no. E00032 URL is:- www.bios.org.uk/npor.html   I also have a vague recollection of seeing something similar elsewhere.   It seems like a worthwhile project. I'd like to do something similar with the 1m ?Brycesson in my present church, but finding space for a second department would be a problem.   Thanks for the interesting post.   Every Blessing   Tony    
(back) Subject: Organ Winding Questions From: "Dave McClellan" <deep_tremolo@hotmail.com> Date: Thu, 20 Dec 2001 07:37:40 -0500   My residence organ will likely require two different pressures. For sake = of an example, let us assume the following:   Static Pressure: 7 7/8" (200mm) High Pressure: 5" (127mm) Low Pressure: 3 1/2" (89mm)   Due to very limited space, I am planning on placing the high and a low pressure reservoir stacked directly on top of the blower enclosure. My plans are that blower output goes only to a "high pressure" reservoir (48" = x 30" curtain valve type). The "high pressure" reservoir is set to 5" and supplies air for a couple of ranks on 5" wind (trumpet and maybe one = other) as well as supplying static wind for the console and future swell shade motor. The high pressure reservoir is not really a "static reservoir" = since it also supplies air to a couple of ranks.   The regulated output of the "high pressure" reservoir then goes to a = smaller "low pressure" reservoir (28" x 40" Wicks/WurliTzer cone/dual flapper = valve type) set at 3.5" and to a second smaller reservoir (Moller curtain valve type) also set at 3.5" for the some of the pedal pipes on offset chests.   The question: will this scheme work, or must I connect all three = reservoirs to static wind? The lower pressure reservoirs in my example will have a headroom of only about 1.5" (38mm) to operate in (5" in, 3.5" out).   Second related question: if one were to try and trem such an instrument, where would the Arndt dump valve trem be connected?   Thanks for any advice. Dave         _________________________________________________________________ Get your FREE download of MSN Explorer at = http://explorer.msn.com/intl.asp.    
(back) Subject: Re: [Residence Organs] tuning frequencies From: "Ron Natalie" <ron@sensor.com> Date: Thu, 20 Dec 2001 14:37:01 -0500       STEVE PITTS wrote: > > does anyone have "standard" frequency list for pipe organ tuning? > I would like at least the middle c octave frequencies...   No. You have to know the base pitch (what frequency A is, 440 is common, but organs are frequently pitched otherwise) and the temperment (what the ratios of frequencys of the notes within an octave are).   More than you care to know about the subject, as well as a calculator for generating custom tables for your needs is here:   http://www-personal.umich.edu/~bpl/temper.html