DIYAPASON-L Digest #835 - Thursday, June 26, 2003
 
Re: Wire Guage Question
  by "Marc Kaufman" <kaufman@cs.stanford.edu>
Re: Variable Frequency Drives
  by "Marc Kaufman" <kaufman@cs.stanford.edu>
Blowers and Mixed Actions
  by "Tony Newnham" <organist@tsnp.fsnet.co.uk>
RE: [Residence Organs]  Blowers and Mixed Actions
  by "atos" <atos@stirlingprop.com>
Re: [Residence Organs]  Scary Update (not really scary anymore)
  by "Larry Chace" <RLC1@etnainstruments.com>
Re: [Residence Organs]  Scarey
  by "Nelson Denton" <ndenton@cogeco.ca>
 

(back) Subject: Re: Wire Guage Question From: "Marc Kaufman" <kaufman@cs.stanford.edu> Date: Wed, 25 Jun 2003 23:07:27 -0700   >2. Will 22g wire punch down into the Type-66 punch down blocks?   66 blocks are rated for wire guages 22-26  
(back) Subject: Re: Variable Frequency Drives From: "Marc Kaufman" <kaufman@cs.stanford.edu> Date: Wed, 25 Jun 2003 23:08:47 -0700   A Google search will turn up lots of single phase input 3-phase output variable frequency drives. You don't have to start with a 3-phase input device.  
(back) Subject: Blowers and Mixed Actions From: "Tony Newnham" <organist@tsnp.fsnet.co.uk> Date: Wed, 25 Jun 2003 10:13:17 +0100   This is a multi-part message in MIME format.   ------=3D_NextPart_000_0106_01C33B02.65574F60 Content-Type: text/plain; charset=3D"iso-8859-1" Content-Transfer-Encoding: quoted-printable   Hi   Progress at last - although only small. The new building frame is =3D together, and the key frame stripped of layers of old paint and =3D re-varnished. Keys are back in. Next job is to get the chest =3D positioned accurately so I can get the tracker action back together.   Two questions:-   1) Has anyone had experience of small, constant pressure blowers with no = =3D reservoir? I'm considering this route, as the organ is now in an =3D upstairs room, and space is at a premium. The organ is a 3 stop =3D "Chancel organ", said to be by Bishop, c.1870. Rebuilt 1973. I didn't = =3D have opportunity to measure wind pressure before dismantling, but would = =3D guess no more that 3in w.g.=3D20   2) I'm considering fitting pull-down magnets, to interface with a MIDI =3D system in addition to the tracker action, which I want to retain at all = =3D costs. Has anyone tried this? Any comments/suggestions welcome.   Thanks in advance.   Every Blessing   Tony   ------=3D_NextPart_000_0106_01C33B02.65574F60 Content-Type: text/html; charset=3D"iso-8859-1" Content-Transfer-Encoding: quoted-printable   <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3D3DContent-Type content=3D3D"text/html; =3D charset=3D3Diso-8859-1"> <META content=3D3D"MSHTML 6.00.2600.0" name=3D3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D3D#ffffff> <DIV><FONT face=3D3DArial size=3D3D2>Hi</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Progress at last - although only =3D small.&nbsp; The=3D20 new building frame is together, and the key frame stripped of layers of = =3D old=3D20 paint and re-varnished.&nbsp; Keys are back in.&nbsp; Next job is to get = =3D the=3D20 chest positioned accurately so I can get the tracker action back=3D20 together.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Two questions:-</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>1) Has anyone had experience of = small, =3D constant=3D20 pressure blowers with no reservoir?&nbsp; I'm considering this route, as = =3D the=3D20 organ is now in an upstairs room, and space is at a premium.&nbsp; The =3D organ is=3D20 a 3 stop "Chancel organ", said to be by Bishop, c.1870.&nbsp; Rebuilt=3D20 1973.&nbsp; I didn't have opportunity to measure wind pressure before=3D20 dismantling, but would guess no more that 3in w.g. </FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>2) I'm considering fitting pull-down = =3D magnets, to=3D20 interface with a MIDI system in addition to the tracker action, which I = =3D want to=3D20 retain at all costs.&nbsp; Has anyone tried this?&nbsp; Any =3D comments/suggestions=3D20 welcome.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Thanks in advance.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Every Blessing</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Tony</FONT></DIV></BODY></HTML>   ------=3D_NextPart_000_0106_01C33B02.65574F60--    
(back) Subject: RE: [Residence Organs] Blowers and Mixed Actions From: "atos" <atos@stirlingprop.com> Date: Thu, 26 Jun 2003 05:27:05 -0500   This is a multi-part message in MIME format.   ------=3D_NextPart_000_0002_01C33BA3.94D06820 Content-Type: text/plain; charset=3D"iso-8859-1" Content-Transfer-Encoding: 7bit   Regarding your question about operating without a reservoir, I am not absolutely sure how it would apply to a low-pressure instrument, but I = have experience trying this with a theatre organ. Aside from the obvious issue = of the trems not working correctly on the theatre organ, there was no regulation. On the organ where I was forced to try this out of necessity because of a recital someone scheduled in the middle of a regulator re-leathering, the pipes were voiced on 10". The blower delivered a = constant 12", which admittedly is a little marginal. Although the instrument was in tune at static pressure, the ear could definitely detect changes in pitch and harmonic quality when playing loud passages, or passages where notes were held for some length. I am not a classical organ expert, but I would think that at lower pressures, this would become even more pronounced. I = am sure you considered all your options, but even a 1'x1' regulator would be better than nothing at all. -----Original Message----- From: DIYAPASON-L@pipechat.org [mailto:DIYAPASON-L@pipechat.org]On = Behalf Of Tony Newnham Sent: Wednesday, June 25, 2003 4:13 AM To: Residence Organ List Subject: [Residence Organs] Blowers and Mixed Actions     Hi   Progress at last - although only small. The new building frame is together, and the key frame stripped of layers of old paint and re-varnished. Keys are back in. Next job is to get the chest positioned accurately so I can get the tracker action back together.   Two questions:-   1) Has anyone had experience of small, constant pressure blowers with no reservoir? I'm considering this route, as the organ is now in an upstairs room, and space is at a premium. The organ is a 3 stop "Chancel organ", said to be by Bishop, c.1870. Rebuilt 1973. I didn't have opportunity to measure wind pressure before dismantling, but would guess no more that 3in w.g.   2) I'm considering fitting pull-down magnets, to interface with a MIDI system in addition to the tracker action, which I want to retain at all costs. Has anyone tried this? Any comments/suggestions welcome.   Thanks in advance.   Every Blessing   Tony   ------=3D_NextPart_000_0002_01C33BA3.94D06820 Content-Type: text/html; charset=3D"iso-8859-1" Content-Transfer-Encoding: quoted-printable   <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3D3DContent-Type content=3D3D"text/html; =3D charset=3D3Diso-8859-1"> <META content=3D3D"MSHTML 6.00.2800.1170" name=3D3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D3D#ffffff> <DIV><SPAN class=3D3D125041510-26062003><FONT face=3D3DArial = color=3D3D#0000ff =3D   size=3D3D2>Regarding your question about operating without a reservoir, I = =3D am not=3D20 absolutely sure how it would apply to a low-pressure instrument, but I =3D have=3D20 experience trying this with a theatre organ. Aside from the obvious =3D issue of the=3D20 trems not working correctly on the theatre organ, there was no =3D regulation. On=3D20 the organ where I was forced to try this out of necessity because of a =3D recital=3D20 someone scheduled in the middle of a regulator re-leathering, the pipes = =3D were=3D20 voiced on 10". The blower delivered a constant 12", which admittedly is = =3D a little=3D20 marginal. Although the instrument was in tune at static pressure, the =3D ear could=3D20 definitely detect changes in pitch and harmonic quality when playing =3D loud=3D20 passages, or passages where notes were held for some length. I am not = a=3D20 classical organ expert, but I would think that at lower pressures, this = =3D would=3D20 become even more pronounced. I am sure you considered all your options, = =3D but even=3D20 a 1'x1' regulator would be better than nothing at all. =3D </FONT></SPAN></DIV> <BLOCKQUOTE dir=3D3Dltr style=3D3D"MARGIN-RIGHT: 0px"> <DIV class=3D3DOutlookMessageHeader dir=3D3Dltr align=3D3Dleft><FONT =3D face=3D3DTahoma=3D20 size=3D3D2>-----Original Message-----<BR><B>From:</B> =3D DIYAPASON-L@pipechat.org=3D20 [mailto:DIYAPASON-L@pipechat.org]<B>On Behalf Of </B>Tony=3D20 Newnham<BR><B>Sent:</B> Wednesday, June 25, 2003 4:13 AM<BR><B>To:</B> = =3D   Residence Organ List<BR><B>Subject:</B> [Residence Organs] Blowers and = =3D Mixed=3D20 Actions<BR><BR></FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2>Hi</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Progress at last - although only = =3D small.&nbsp; The=3D20 new building frame is together, and the key frame stripped of layers =3D of old=3D20 paint and re-varnished.&nbsp; Keys are back in.&nbsp; Next job is to =3D get the=3D20 chest positioned accurately so I can get the tracker action back=3D20 together.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Two questions:-</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>1) Has anyone had experience of =3D small, constant=3D20 pressure blowers with no reservoir?&nbsp; I'm considering this route, = =3D as the=3D20 organ is now in an upstairs room, and space is at a premium.&nbsp; The = =3D organ=3D20 is a 3 stop "Chancel organ", said to be by Bishop, c.1870.&nbsp; =3D Rebuilt=3D20 1973.&nbsp; I didn't have opportunity to measure wind pressure = before=3D20 dismantling, but would guess no more that 3in w.g. </FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>2) I'm considering fitting = pull-down =3D magnets, to=3D20 interface with a MIDI system in addition to the tracker action, which = =3D I want=3D20 to retain at all costs.&nbsp; Has anyone tried this?&nbsp; Any=3D20 comments/suggestions welcome.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Thanks in advance.</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Every Blessing</FONT></DIV> <DIV><FONT face=3D3DArial size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial =3D size=3D3D2>Tony</FONT></DIV></BLOCKQUOTE></BODY></HTML>   ------=3D_NextPart_000_0002_01C33BA3.94D06820--      
(back) Subject: Re: [Residence Organs] Scary Update (not really scary anymore) From: "Larry Chace" <RLC1@etnainstruments.com> Date: Thu, 26 Jun 2003 23:38:52 -0400   To Paul and others who may be in need of driver chips:   The common ULN2803A and ULN2804A are carried by many distributors. Two of them who have web access are:   http://www.jdr.com http://www.digikey.com   The chips cost about $0.50 each, so get plenty "just in case"! ;-)   These devices are 8 "Darlington pair" transistors (semi-high-current) in = an 18-pin package. They have a single ground pin, through which all of the current for all of the driven devices must flow, and another pin that connects to a set of built-in diodes that can be used to suppress the high-voltage spike that can otherwise appear when an electromagnet is turned off. That spike can destroy the transistors (usually not right away...).   If any part of the circuitry for that pin is "weak", then the transistors won't be adequately protected, and the device can turn into a miniature volcano. If you've put diodes directly across the magnets, then this connection is not important (but I'd still use it "just in case"). The built-in diodes aren't terribly hefty, and I'd always suggest the use of separate diodes right at the magnets in almost every case. (Very high resistance magnets, like 400 ohms, won't tax the built-in diodes too much, *if* the wiring is all intact.)   Digi-Key's web site is the more elegant of the two (but for small quantities JDR's prices are often lower). D-K also has links to the detailed technical datasheets for the devices, and it is always good to have that data on hand.   Larry Chace        
(back) Subject: Re: [Residence Organs] Scarey From: "Nelson Denton" <ndenton@cogeco.ca> Date: Thu, 26 Jun 2003 23:34:12 -0400   This is a multi-part message in MIME format.   ------=3D_NextPart_000_0066_01C33C3B.72A922D0 Content-Type: text/plain; charset=3D"Windows-1252" Content-Transfer-Encoding: quoted-printable   Yup it REALLY was as if it was haunted. It was like an earthquake in the = =3D organ chamber.(having personally been in an organ chamber during an =3D earthquake I know how that feels!) When 5'x10'bellows bounce up and down = =3D 4", watching 100lb steel bellows weights bounce about at the rate of a = =3D slow tremulant and shutters bang open a closed at the same speed it is =3D VERY SCARY - not to mention hard on the organ!.   Naaah... Couldn't have been anything so prosaic as a loose wire... = =3D this sounds like your organ was haunted!! :-) ( the effects =3D you described must have been MOST impressive if you were there =3D practicing at midnight...! )   Harry Chase     --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.493 / Virus Database: 292 - Release Date: 25-Jun-03 ------=3D_NextPart_000_0066_01C33C3B.72A922D0 Content-Type: text/html; charset=3D"Windows-1252" Content-Transfer-Encoding: quoted-printable   <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3D3DContent-Type content=3D3D"text/html; =3D charset=3D3Dwindows-1252"> <META content=3D3D"MSHTML 6.00.2800.1170" name=3D3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D3D#ffffff> <DIV><FONT size=3D3D2>Yup it REALLY was as if it was haunted. It was like = =3D an=3D20 earthquake in the organ chamber.(having personally been in an organ =3D chamber=3D20 during an earthquake I know how&nbsp;that feels!)&nbsp;When =3D 5'x10'bellows bounce=3D20 up and down 4", watching 100lb steel bellows weights bounce about =3D &nbsp;at the=3D20 rate of a slow tremulant and shutters bang open a closed at the same =3D speed it is=3D20 VERY SCARY - not to mention hard on the organ!.</FONT><BR></DIV> <BLOCKQUOTE dir=3D3Dltr=3D20 style=3D3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =3D BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV><FONT face=3D3DArial size=3D3D2>Naaah...&nbsp;&nbsp; Couldn't have = =3D been anything=3D20 so prosaic as a loose wire...&nbsp;&nbsp; this sounds like your organ = =3D was=3D20 haunted!!=3D20 :-)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; = =3D ( the=3D20 effects you described must have been MOST impressive if you were there = =3D   practicing at midnight...! )</FONT></DIV> <DIV><FONT size=3D3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2>Harry Chase</FONT></DIV> <DIV>&nbsp;</DIV> <DIV><FONT face=3D3DArial size=3D3D2><BR>---<BR>Outgoing mail is = certified =3D Virus=3D20 Free.<BR>Checked by AVG anti-virus system (<A=3D20 =3D href=3D3D"http://www.grisoft.com">http://www.grisoft.com</A>).<BR>Version: = =3D 6.0.493=3D20 / Virus Database: 292 - Release Date:=3D20 25-Jun-03</FONT></DIV></BLOCKQUOTE></BODY></HTML>   ------=3D_NextPart_000_0066_01C33C3B.72A922D0--