HP-34C Spice series keypad



#3

In the process of repairing a soldered version of the HP-34C, I noticed that the keypad has a rubber cushioning material located between the keys and the key snap domes. In this particular calculator, the material has completely deteriorated. I searched the HP Museum archives for references to Spice series keypads, and discovered a few prior discussions of this topic. However, there didn't seem to be a conclusion about which material to use as a replacement. The rubber membrane is approximately 0.025" thick and is tan in color. I searched MSC Direct and Smallparts.com for substitute materials, and turned up a few options for 1/32" thick elastomeric sheets with various Durometer values, etc. Before I place an order for a random replacement, I am curious if there are any suggestions regarding what materials has been previously tried/used?


#4

I will be interested in the outcome here Robert. Keep us posted.

It seems to be a firm type of foam and I guess I have been lucky so far with my 6 spices.

I just posted the restoration which I did this morning coincidentally!

Cheers, Geoff


Possibly Related Threads...
Thread Author Replies Views Last Post
  Prime as laptop numeric keypad Jose Gonzalez Divasson 1 413 10-31-2013, 02:25 AM
Last Post: debrouxl
  HP-10C Series Family Photo Max Stone 5 843 10-24-2013, 10:31 PM
Last Post: Eddie W. Shore
  HP-34C Draining battery quickly Bill Crowell 2 523 09-08-2013, 08:30 AM
Last Post: aj04062
  HP-34C Curiosity Matt Agajanian 7 933 08-23-2013, 06:02 PM
Last Post: Stephan Matthys
  CLASSIC/SPICE KEY LEGENDS Mike T. 2 519 08-21-2013, 04:53 PM
Last Post: Mike T.
  HP 50g Takes hours to compute a convergent series Matthew Richards 10 1,074 05-14-2013, 03:30 PM
Last Post: Thomas Klemm
  HP Spice Legacy in the former CCCP (MK-61) Mike Morrow 17 1,631 04-07-2013, 08:25 PM
Last Post: db (martinez, ca.)
  HP-34C Emulator BShoring 8 986 03-30-2013, 05:04 PM
Last Post: BShoring
  HP Calc Series Mic 3 550 03-21-2013, 01:34 AM
Last Post: Mic
  HP 48G series -> 20 years NACHO 0 354 12-13-2012, 09:40 AM
Last Post: Nacho

Forum Jump: