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Private Message added 2008-06-09 |
| Date | 2008-06-02 |
| Message | Hello Skylar,
It's most welcome to have a comment from a member of the Friden family. Yes this old C10 calculator (under Site Map, see Friden ) is performing basic addition and subtraction quite well -- amazing for its age. (The C10 performed automatic division, but I don't have that working yet.) It would be nice to have a wiring diagram for the C10. The wiring seems quite simple but it appears this machine has a short somewhere. Thank you for your comment and if you find anything that might be of help, I'd be most grateful. I hope to get this working and post some information and photos about how these amazing old mechanical machines worked. Best regards, -RetroCalculators |
| Date | 2008-06-01 |
| Location |  |
| Message | My grand-daughter asked me about abacuses, and I was delighted to come across your site and your great demonstration. many thanks |
| Date | 2008-05-27 |
| Location |  |
| Message | Hello, I saw your video and the problem you are having. So the calculator works fine otherwise? wow I will take a look and see if we have one on hand to compare. Well just thought I would post something so that people can see Fridens still exist  . Thanks |
| Date | 2008-05-22 |
| Message | I'm a big fan of these unusually shaped figure-eight adders. A Webb Adder is generally worth more than Victor or other off-brand figure eight adders. The older models are worth more, and those with a nice wood base generally are worth the most. On ebay the plain Victor Adder shown on this site might fetch $100-$200. A brass Webb Adder on a wood plate in good condition perhaps $500, but prices vary quite a bit -- good luck! -RetroCalculators |
| Date | 2008-05-20 |
| Location | |
| Message | I have either a Webb or Victor figure eight adder, I will have to check to be sure which it is. The adder is in great condition, it belonged to my dad's aunt so I know that it's been around for a while. I was wondering what the value of it and how to go about selling it for what it's worth. It would be easier for you to e-mail me, rather than call me at first. I work nights and I sleep during the day. Please give me your input on this. Thank you, Ronnie |
| Date | 2008-04-27 |
| Message | The Curta appears often on ebay; the final price varies quite a bit, but around $800 I'd say. Good luck! and thanks for your comment -RetroCalculators |
| Date | 2008-04-22 |
| Location | |
| Message | That Curta is amazing. Where could a person find one of those and what would be a fair price to pay? |
| Date | 2008-04-06 |
| Message | Kate wrote: >Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other... You are right. I've not been abacus trained but I've heard that proper fingering is essential to becoming fast. Thanks for your comments - and kind regards, -rich |
| Date | 2008-04-01 |
| Message | I loved your abacus demonstration, but there's one aspect that was incorrect, a formality, really. Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other operations, like adding/subtracting five (Heaven) beads, and subtracting one (Earth) beads. It's supposed to be a matter of efficiency, even though so far I haven't seen any information to support that, so I guess it's more a matter of tradition. Keep it up, your site is a very nice resource! |
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