HP-41C battery contact fix



#2

I just discovered a relatively easy way of fixing the HP-41C series calculator battery contacts. These are the gold or other gold color metal plated contacts on the battery contact block. Battery corrosion and mechanical wear from the batteries tend to ruin these contacts. You can apply a conductive epoxy to the damaged areas and this seems to work. I don't know yet if this type of epoxy oxidizes in time which would cause it to fail later. The epoxy I used is made by Circuit Works (part # CW2400). It is available through Allied electronics and is not cheap at about $18 for the two tube set (7 grams). The tubes have Chemtronics (www.chemtronics.com) printed on them.(http://www.chemtronics.com/catalog/catalog.cgi?action=list_products&category=7)
This product is normally used for circuit board trace repair. Please use at your own risk. Has anyone else out there ever used this type epoxy for battery contact repairs?


#3

Hi Erik,

Good idea! I've used the same stuff for several difficult to repair electrical contacts (e.g., attaching leads to solar cells and fixing rear window defroster contacts), but never for a contact that's likely to see some wear and tear. However, the stuff does seem to last for many years and does not break down easily, not even in outdoor applications. I'll bet that it holds up fine.

-Katie


Possibly Related Threads...
Thread Author Replies Views Last Post
  SCIOVR and ENGOVR in FIX mode Andrew Nikitin 5 813 07-02-2013, 04:46 AM
Last Post: Victor Koechli
  Bill Smithville NJ please contact me Don Shepherd 1 438 09-23-2012, 03:36 PM
Last Post: Bill (Smithville, NJ)
  A temporary "fix", the Casio Prism (fx-CG10) LHH 5 919 08-25-2012, 07:39 PM
Last Post: LHH
  Craigslist find and fix - HP 19C Matt Fegenbush 12 1,518 08-13-2012, 02:57 PM
Last Post: Matt Fegenbush
  HP-97 Key Contact Repair Adventure LHH 0 426 06-09-2012, 05:26 PM
Last Post: LHH
  aOT--Battery/battery contact care advice needed Matt Agajanian 0 491 04-24-2012, 07:35 PM
Last Post: Matt Agajanian
  Keyboard fix for the HP 15C LE Jeff Raines 2 586 03-31-2012, 12:49 AM
Last Post: Jeff Raines
  Just a thought I had--a 35S Trig fix Matt Agajanian 62 4,324 03-26-2012, 10:40 AM
Last Post: bill platt
  15C-LE Overdue for a fix? Matt Agajanian 7 1,025 03-24-2012, 01:46 PM
Last Post: nina scholz
  Keyboard fix for the HP 15C LE? Jeff Raines 4 724 03-23-2012, 10:54 AM
Last Post: Jeff Raines

Forum Jump: