Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > April 2006 > 2006.04.29 > 01Prev  Next


Key Switch Contact Bounce in Organ Keyboards
By David Dewey

Phil Duclos mentioned clamping diodes and the unlikeliness of finding
them on an older instrument.  We have added diodes to our 1928 Reuter.
That parts aren't expensive -- I think the price per diode was something
like 39 cents.  (Notice that us really _cheap_ guys know how to get the
cents sign on our computers :)  However there was a lot of labor
involved, all volunteer fortunately.

Unfortunately we found out the organ had been reverse polarized by
some unknown repair person eons ago, and when we later added some solid
state switching we had to reverse the polarity and remove the diodes!
Fortunately the solid state switches included their own clamping diodes.

Back to the original subject; the addition of the clamping diodes was
to extend the life of the key contacts and it is probably a recommended
addition to any similar installation.

David Dewey


(Message sent Sat 29 Apr 2006, 17:58:20 GMT, from time zone GMT-0700.)

Key Words in Subject:  Bounce, Contact, Key, Keyboards, Organ, Switch

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2019 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

                                                       
Translate This Page

. .