HP 65/67 card reader balls
09-06-2019, 02:23 AM
Post: #1
 NoEqualsButton Junior Member Posts: 41 Joined: Jul 2019
HP 65/67 card reader balls
If anybody needs some of these, I now have 300 3mm solid sphere polypropylene balls. Just PM me and I will post them out to you. Gratis.

I got the from here,

Get 'em while they're hot!

Steve

HP11C, HP12C, HP15C, HP16C, HP25, HP32S, HP33C, HP41CV, DM42, HP46, HP65
09-06-2019, 04:13 AM
Post: #2
 Dave Frederickson Senior Member Posts: 2,202 Joined: Dec 2013
RE: HP 65/67 card reader balls
The balls were previously identified as being 1/8".

https://www.hpmuseum.org/forum/archive/i...-5522.html

I don't know if 3mm balls will make a difference.
09-06-2019, 05:08 AM (This post was last modified: 09-06-2019 05:09 AM by NoEqualsButton.)
Post: #3
 NoEqualsButton Junior Member Posts: 41 Joined: Jul 2019
RE: HP 65/67 card reader balls
(09-06-2019 04:13 AM)Dave Frederickson Wrote:  I don't know if 3mm balls will make a difference.

They put the calculator into metric mode by default.

Steve

HP11C, HP12C, HP15C, HP16C, HP25, HP32S, HP33C, HP41CV, DM42, HP46, HP65
09-06-2019, 06:09 AM
Post: #4
 Massimo Gnerucci Senior Member Posts: 2,672 Joined: Dec 2013
RE: HP 65/67 card reader balls
(09-06-2019 05:08 AM)NoEqualsButton Wrote:
(09-06-2019 04:13 AM)Dave Frederickson Wrote:  I don't know if 3mm balls will make a difference.

They put the calculator into metric mode by default.

Ahahah!
Good one. :D

Greetings,
Massimo

-+×÷ ↔ left is right and right is wrong
09-06-2019, 11:21 AM (This post was last modified: 09-06-2019 11:21 AM by toml_12953.)
Post: #5
 toml_12953 Senior Member Posts: 2,125 Joined: Dec 2013
RE: HP 65/67 card reader balls
(09-06-2019 05:08 AM)NoEqualsButton Wrote:
(09-06-2019 04:13 AM)Dave Frederickson Wrote:  I don't know if 3mm balls will make a difference.

They put the calculator into metric mode by default.

No no no!!!! I want the calculator to be a comfortable, antique relic of the last century (like my country) not a modern, efficient useful tool of the 21st century.

Tom L
Cui bono?
09-06-2019, 04:03 PM
Post: #6
 Dave Frederickson Senior Member Posts: 2,202 Joined: Dec 2013
RE: HP 65/67 card reader balls
(09-06-2019 05:08 AM)NoEqualsButton Wrote:  They put the calculator into metric mode by default.

That's what NASA said about the Mars Climate Orbiter disaster.
09-11-2019, 02:57 AM
Post: #7
 Francois Lanciault Member Posts: 117 Joined: Dec 2013
RE: HP 65/67 card reader balls
McMaster has some with a 1/8" diameter +/- 0.002"

https://www.mcmaster.com/polypropylene-balls

However, I have heard that McMaster don't allow new account from individuals, just companies. I am glad I was able to setup an account years ago that still works.

Francois
09-11-2019, 04:57 PM
Post: #8
 Dave Frederickson Senior Member Posts: 2,202 Joined: Dec 2013
RE: HP 65/67 card reader balls
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