DIYAPASON-L Digest #687 - Monday, November 18, 2002
 
RE: rectifier output voltage
  by "STEVE PITTS" <steve.pitts@adtran.com>
RE: [Residence Organs]  RE: rectifier output voltage
  by "ATOS" <atos@stirlingprop.com>
 

(back) Subject: RE: rectifier output voltage From: "STEVE PITTS" <steve.pitts@adtran.com> Date: Mon, 18 Nov 2002 11:25:02 -0600       I have a Elgin organ power supply connected to my Schlicker console. I = have noticed that the coils of energized gang-switches are getting quite = warm. I checked the output of the power supply and found 16 volts. I was = expecting 12 volts.I don't know the make of the gang switches, but I am = guessing they generally have similar voltage ratings. This is not a regulated = supply, IOW it just has a transformer, rectifier diodes and a filter = capacitor. Is 16 volts too much?     Steve Pitts Ardmore Tennessee  
(back) Subject: RE: [Residence Organs] RE: rectifier output voltage From: "ATOS" <atos@stirlingprop.com> Date: Mon, 18 Nov 2002 15:35:20 -0600   Steve, 16 volts could possibly be a little high. Does your power transformer have taps on the primary? With my OrgElectra, there are several different taps = so I can adjust the voltage by moving one of the incoming hot leads to different terminal screws. The input voltage here usually runs about 232 volts and I have to set mine down on the lowest tap to maintain the output at around 13.5 volts. Remember too that the voltage lowers as the organ loads the transformer down when you are playing. I have heard that direct electric valves require higher voltages in some case, but I am running = 13.5 volts on a 10 rank Wurlitzer and everything seems to be happy.   You might also check the condition of the capacitors because if there is = an AC component in the DC voltage because of filter capacitors failing, that could heat up your DC coils.   -----Original Message----- From: DIYAPASON-L@pipechat.org [mailto:DIYAPASON-L@pipechat.org]On Behalf Of STEVE PITTS Sent: Monday, November 18, 2002 11:25 AM To: 'Residence Organ List' Subject: [Residence Organs] RE: rectifier output voltage         I have a Elgin organ power supply connected to my Schlicker console. I = have noticed that the coils of energized gang-switches are getting quite warm. = I checked the output of the power supply and found 16 volts. I was = expecting 12 volts.I don't know the make of the gang switches, but I am guessing they generally have similar voltage ratings. This is not a regulated = supply, IOW it just has a transformer, rectifier diodes and a filter capacitor. Is 16 volts too much?     Steve Pitts Ardmore Tennessee   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