|HP 41CL; requirements and thoughts about donor shells|
Message #1 Posted by geoff quickfall on 4 Dec 2011, 3:19 p.m.
I think, with Monte's new release, that a review of appropriate donors would be helpful.
* must be a fullnut; squared lcd corners; *NOT* rounded lcd corners.
(figures 1 and 2)
* separate logic board.
* must have perfect or perfectly repaired screw posts.
* can have elastomere zebra strips but the wire wrapped are best.
* display drivers come in two types with respect to the CL design.
- rounded square caps which require a capacitor modification.
(figures 3, 4 and 5)
- epoxy blobs which do not require modification.
* time module, although not required, it does activate the clock.
the functions are avialable without the module.
figure 1: square LCD panel (a donor).
figure 2: rounded LCD panel (not a donor).
figure 3: wire wrapped connector.
figure 4: example of square capped drivers.
figure 5: wiring diagram for capacitor modification.
figure 6: example soldered in place.
*CX's would be a waste of a good (albiet slow machine) although
the entire process is reversable from a collectors viewpoint
*CV's are a perfect choice depending on condition.
*C's with slanted keys are more readable.
*C's with tall keys are fun because they are the oldest and combined
with the newest make for a conversation piece.
I have a 41C from 79 with tall keys, square lcd drivers and the two gold ac connector balls. I chose the C out of sentimental reasons as it is my first HP 41C purchased way back when.
Hope this helps, and thanks Monte, still playing! and using!
Edited: 4 Dec 2011, 7:57 p.m. after one or more responses were posted