DIYAPASON-L Digest #854 - Wednesday, August 6, 2003
 
Re: [Residence Organs]  Just when I thought I had it all figured  out....
  by "Paul Soulek" <pipeorganpaul@yahoo.com>
 

(back) Subject: Re: [Residence Organs] Just when I thought I had it all figured out.... From: "Paul Soulek" <pipeorganpaul@yahoo.com> Date: Wed, 6 Aug 2003 09:41:53 -0700 (PDT)   Quick update: I received an e-mail from someone that works at Rodgers confirming that the power supply is supposed to put out 19 volts. (I'm kind of glad---the power supply is more expensive to replace than the circuit boards, should it come to that)   Thanks for your help Paul     --- Larry Chace <RLC1@etnainstruments.com> wrote: > Paul Soulek described a problem. The chip in > question is probably a > "40106", also known as "4584 or 74C14", which is in > fact 6 Schmitt trigger > inverters. The 4000-series of CMOS integrated > circuits is specified to > operate on voltages up to about 18v. A supply > voltage of 19.2v is just > beyond the specified maximum. I'd say that the > "15v" supply is probably > one of those (in)famous wall-warts that puts out > more than its stated > voltage. > > (Maybe I'm wrong, but 19.2v is really too much for > the poor little CMOS > guys, who will operate very happily on, say, 12v or > 15v for years at a > time.) > > Replacements are available (via the web) from many > sources, including, but > not limited to : > > http://www.jdr.com > http://www.digikey.com > > Expect to pay about $0.50 each, or maybe less. > > From Paul's description, it may well seem that there > is something else > wrong, but I'd correct the voltage supply first. > The good folks at Rodgers > should be able to provide good advice. > > Larry Chace > > > > 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 > >     __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com