DIYAPASON-L Digest #454 - Wednesday, December 5, 2001
 
Re: control system
  by "Dave McClellan" <deep_tremolo@hotmail.com>
Re: [Residence Organs]  Re: control system
  by <Mpmollerorgan@aol.com>
 

(back) Subject: Re: control system From: "Dave McClellan" <deep_tremolo@hotmail.com> Date: Wed, 05 Dec 2001 06:41:53 -0500   If anyone needs 100+ used chest magnets (Mudler Hunter, circa 1910) they = may have them for the cost of shipping and packing. But be advised, they are HEAVY! One also must consider the time required to clean them up, and = also the lead length issue mentioned on the list. These are the type with the little door on the front secured with a sliding clip, rather than screw-on =   caps.   Regarding relays and drivers, the Wicks organ site has two power = transistor relays for sale. Each appears to have two 61 note panels and one 32 note panel, with fuses etc. They also have Wicks type gang switches. It may = be cheaper to buy the driver panels already assembled than to build from scratch. I also have seen several organ builders with these panels lying around in their stock rooms. I can provide the schematic of the Wicks = type driver circuit, but it uses PNP power transistors (not recommended for = many reasons)!   I would not give up on used Reisner type gang switches - that's what I = used for my residence instrument (10 ranks), with no problems (yet). But it takes a LOT OF TIME (which I have a lot more of than money) to strip off = the old wiring and clean them up. In my case, I completely disassembled each switch, removed the wiring from the buss bars and contact finger blocks, removed the contact blocks and buss bars (they are silver, I think) and cleaned them in an ultrasonic cleaner with sudsy ammonia. My relay was constructed from a Wicks relay with additional switching added using = Reisner switches.   Dave   _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp    
(back) Subject: Re: [Residence Organs] Re: control system From: <Mpmollerorgan@aol.com> Date: Wed, 5 Dec 2001 09:35:38 EST     In a message dated 12/5/01 5:42:40 AM, deep_tremolo@hotmail.com writes:   > >I would not give up on used Reisner type gang switches - that's what I >used >for my residence instrument (10 ranks), with no problems (yet). But it > >takes a LOT OF TIME (which I have a lot more of than money) to strip off >the >old wiring and clean them up. In my case, I completely disassembled each >       OSI has these for about $70 as I recall brand new, so one has to weigh the =   time and labor of salvaging old switching, getting it home via UPS or whatever and going through the cleaning etc. Most EP organ problems seem to be electical, dead notes, ciphers, burnt contact wires etc, all caused usually by dirty grungy connections. Used switching is murder to clean perfectly like new if you ever even CAN that = is. A lot of times I believe the silver plating will be worn off where there = was friction. SO in the end one is really ahead to buy new gang switches and relays.   I am using Radio Shack 30 amp automotive relays for my stop action, they = are less than $5 each (one per rank) and are made in the UK.   Randall http://members.aol.com/mpmollerorgan/