I've got a Tek 221 portable Oscope that uses 10 NiCad A cells. (flea market find). It has sat for who knows how long and I'd like to get it going. I've run across various ways of "zapping" the cells to get rid of internal shorts and make them usable again. One guy suggests using a welder to provide power, another with a capacitor, and another users just a couple other good cells. (urls below). Do these techniques work? Is the fix permanent or temporary? Using an electric welder seems pretty dangerous, but the other ways seems pretty straight forward. Any opinions?
On a related note, I just got the Tek 221 service manual (scanned paper in PDF format) from http://www.ebaman.com/ . Those of you in need of manuals might want to check there.
Using welder - http://www.instructables.com/id/Revive-Nicad-Batteries-by-Zapping-with-a-Welder/
Using capacitor - http://www.repairfaq.org/ELE/F_ASCII_Schem.html#ASCIISCHEM_015
Using good cells - http://www.sentex.net/~mec1995/gadgets/rejuv.html
Thanks, Jim
On a related note, I just got the Tek 221 service manual (scanned paper in PDF format) from http://www.ebaman.com/ . Those of you in need of manuals might want to check there.
Using welder - http://www.instructables.com/id/Revive-Nicad-Batteries-by-Zapping-with-a-Welder/
Using capacitor - http://www.repairfaq.org/ELE/F_ASCII_Schem.html#ASCIISCHEM_015
Using good cells - http://www.sentex.net/~mec1995/gadgets/rejuv.html
Thanks, Jim