Great Video! I always loved my slide-rule; I have a Pickett N-500-T which is still in perfect condition. I used this until I got an Hp-35 back in 1972 (and of course never looked back!). I always found the slide-rule to have sufficient accuracy but always had a terrible problem with finding the decimal point placement. In electronics, I could (for the most part) know where it was based upon "reasonable" values the answer had to be. Did you ever find any bulletproof ways to always nail the decimal-place placement?

Regarding 2:27 Keuffel & Esser Model 68-1100 Deci-Lon slide rules, they were manufactured from 1962 until 1972. Back then they sold for around $25.00.

@drewjarrell2667

2 жыл бұрын

I got one at an antique shop for $20

Hey there. Someone just handed me one of these today. How do I find out the year this one was made?

@tomtektest8042

3 жыл бұрын

Try www.sliderulemuseum.com and look through their extensive collection of images for the year. May Slides Rule!

@MrTobiascollins

3 жыл бұрын

@@tomtektest8042 okie doke I'll check it out

I have a Deci-Lon 10 and a 4083-5 Both from the 1960's

Loved the video! I don't suppose you have a 4181-3 that you can talk about, it's the rule I was given by my Great uncle (and surrogate Grandfather) that he used in the Air Force? I think it's very close to the N4081-3, as on the front side it has LL02 LL03 DF=CF CIF CI C=D LL3 LL2, and on the back side: LL01 L K A=B T SRT S=D DI LL1

@tomtektest8042

4 жыл бұрын

Thanks for the interest. Unfortunately, I do not have any of the 4181 series. I think you are right that it is very close to the 4080-3 which I do have. You might want to go to mccoys-kecatalogs.com if you have not already done so as he lists a manual for download that is for the 4081-1, 4081-3, 4181-3 and 4181-1 (you can find it under the 4081-3 link. That whole series appear to be the same except for material (plastic vs bamboo), at lease on my first glance. These were all known as Log Log Duplex DeciTrig Slide Rules, I think and seem to have the same scales.

@bobmillar2099

Жыл бұрын

I hope it's not too late for me to respond to this, but basically the 4081-3 and the 4181-3 are the same slide rule, just made from different materials. The 4081-3 (which later got renumbered to 68-1210) is made of wood, while the 4181-3 (which got renumbered to 68-1251) is made of plastic called Ivorite.

@user-lk2cj2qs1d

7 ай бұрын

@@tomtektest8042 Have a 4041 with case