DIYAPASON-L Digest #51 - Friday, March 3, 2000
 
Re: [Residence Organs]  Mixture Chest
  by "Dave McClellan" <drmc@speedfactory.net>
Fw: [Residence Organs]  Mixture Chest
  by "VEAGUE" <dutchorgan@svs.net>
Re: [Residence Organs] Mixture Chest
  by "Bart Kleineweber" <prinzipal8@hotmail.com>
Re: Fw: [Residence Organs]  Mixture Chest
  by "Mac Hayes" <mach37@ptw.com>
 

(back) Subject: Re: [Residence Organs] Mixture Chest From: "Dave McClellan" <drmc@speedfactory.net> Date: Fri, 3 Mar 2000 06:37:26 -0500   Larry Chace said: "It also suggests a suitable motto for Home (Organ) Improvement: More Power!"   And I might add (and responded to Bart privately): MORE VOLTAGE. My instrument worked fine until I added an electromechanical relay = constructed based on a 1970's vintage Wicks relay. My action is also Reisner 601's = and Wicks DE magnets. When the relay was added, suddenly some notes would not sound (if the pipe was removed for a moment then reseated, the pipe WOULD sound).   The problem: DIODES and WIRE!   The Wicks relay uses diodes isolated gang switches with (germanium) power transistor drivers. In addition, there is a lot of additional wiring = within the relay. And also, the power input to the power transistor switching panels goes through a large diode to protect against reverse polarity. So the following contribute to voltage losses to the pipe magnets (in MY = case):   1. Additional wiring length 2. Contact resistance in the Reisner or Wicks gang switches 3. Isolation diodes for the switches (silicon, 0.5 volts +) 4. Protection diodes (another .5 volts +) 5. Power Transistor drivers (about .4 volts)   I just cranked the Astron all the way up to max (almost 15 volts) and everything worked fine. I'm sure that if I CAREFULLY adjusted the magnets they would work with 10-12 volts, but I prefer that they get about 13.5 = for reliable operation (in my case: 4" wind).   Dave        
(back) Subject: Fw: [Residence Organs] Mixture Chest From: "VEAGUE" <dutchorgan@svs.net> Date: Fri, 3 Mar 2000 08:24:30 -0500   All this voltage talk....don't forget Wicks- and others- use tremendous current. Gotta have those amps, baby!   Rick     ----- Original Message ----- From: Dave McClellan <drmc@speedfactory.net> To: DIYAPASON-L <DIYAPASON-L@pipechat.org> Sent: Friday, March 03, 2000 6:37 AM Subject: Re: [Residence Organs] Mixture Chest     > Larry Chace said: > "It also suggests a suitable motto for Home (Organ) Improvement: More > Power!" > > And I might add (and responded to Bart privately): MORE VOLTAGE. My > instrument worked fine until I added an electromechanical relay constructed > based on a 1970's vintage Wicks relay. My action is also Reisner 601's and > Wicks DE magnets. When the relay was added, suddenly some notes would = not > sound (if the pipe was removed for a moment then reseated, the pipe = WOULD > sound). > > The problem: DIODES and WIRE! > > The Wicks relay uses diodes isolated gang switches with (germanium) = power > transistor drivers. In addition, there is a lot of additional wiring within > the relay. And also, the power input to the power transistor switching > panels goes through a large diode to protect against reverse polarity. = So > the following contribute to voltage losses to the pipe magnets (in MY case): > > 1. Additional wiring length > 2. Contact resistance in the Reisner or Wicks gang switches > 3. Isolation diodes for the switches (silicon, 0.5 volts +) > 4. Protection diodes (another .5 volts +) > 5. Power Transistor drivers (about .4 volts) > > I just cranked the Astron all the way up to max (almost 15 volts) and > everything worked fine. I'm sure that if I CAREFULLY adjusted the = magnets > they would work with 10-12 volts, but I prefer that they get about 13.5 for > reliable operation (in my case: 4" wind). > > Dave > > > > > 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] Mixture Chest From: "Bart Kleineweber" <prinzipal8@hotmail.com> Date: Fri, 03 Mar 2000 11:44:22 CST   Dear Larry, Dave, and list:   I can't jack up the voltage from the rectifier because the electronic = relay I'm using can only take 12 volts to the chest magnets. However, once the entire relay is installed the old rectifier will only power chest magnets, =   the combination action and the trem and zimbelstern magnets. All the big magnets on the old couplers will no longer be used. The relay has it's = own power supply to power the circuit boards. I think that the mixture chest will only not work if you happen to be tripping the combination action at the same time some notes are held down, then only for a second. In = addition I will lower the wind pressure to 3-1/2" from 4-1/2" to accomodate the voicing of the new pipes. This should make the magnets easier to open.   Bart Kleineweber Chicago, IL prinzipal8@hotmail.com > >Larry Chace said: >"It also suggests a suitable motto for Home (Organ) Improvement: More >Power!" > >And I might add (and responded to Bart privately): MORE VOLTAGE. My >instrument worked fine until I added an electromechanical relay = constructed >based on a 1970's vintage Wicks relay. My action is also Reisner 601's = and >Wicks DE magnets. When the relay was added, suddenly some notes would = not >sound (if the pipe was removed for a moment then reseated, the pipe WOULD >sound). > >The problem: DIODES and WIRE! > >The Wicks relay uses diodes isolated gang switches with (germanium) power >transistor drivers. In addition, there is a lot of additional wiring >within >the relay. And also, the power input to the power transistor switching >panels goes through a large diode to protect against reverse polarity. = So >the following contribute to voltage losses to the pipe magnets (in MY >case): > >1. Additional wiring length >2. Contact resistance in the Reisner or Wicks gang switches >3. Isolation diodes for the switches (silicon, 0.5 volts +) >4. Protection diodes (another .5 volts +) >5. Power Transistor drivers (about .4 volts) > >I just cranked the Astron all the way up to max (almost 15 volts) and >everything worked fine. I'm sure that if I CAREFULLY adjusted the = magnets >they would work with 10-12 volts, but I prefer that they get about 13.5 = for >reliable operation (in my case: 4" wind). > >Dave >   ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com    
(back) Subject: Re: Fw: [Residence Organs] Mixture Chest From: "Mac Hayes" <mach37@ptw.com> Date: Fri, 03 Mar 2000 16:08:49 -0800   VEAGUE wrote:   > All this voltage talk....don't forget Wicks- and others- use tremendous > current. Gotta have those amps, baby! >   You are starting to get me concerned that my two 20-amp Durst rectifiers = may not be enough for the 8-10 ranks of direct electric chests I eventually hope to have for my = unified (unitified? ;-) home organ.   Should I be thinking about getting more amps for this system?   Mac Hayes