In contrast, in 1973 I graduated from high school, and was going to go to university, studying electrical engineering. I had a low paying summer job working at a city run day camp. All summer I saved to buy an HP-35, I was very happy that the price had dropped from $450 to $350. At the end of summer I had nearly enough, I think my father helped a bit, at least getting a bit of a discount by buying it at work (he worked for a large engineering firm) Four years later as a fresh out EE I was making $14400 a year, So I guess a new EE in 1973 would get $12,000 or $13,000., or more than $1000 a month. So in 1972 an HP-35 would cost a new engineer in the USA about 1/3 of a months pay. When I was a senior in school my HP-35 was stolen and I replaced it with a far cheaper TI calculator, which while much more cheaply manufactured had slightly more functions. It cost less than $100. Luckily the HP-35 was returned to me in a few weeks, and I have it still, and it still works. Not so with the TI calculator. It bet the TI calculator was comparable or better than the calculator featured here.
You mentioned the switch for grad and rad: they're standard calaulcator modes for specifying what "units" the angles are when doing sin/cos/tan etc. a "grad" is like a degree only there are 400 to a circle instead of 360. "rad" is for radians, where pi radians (3.14...) is the same as 180 degrees.
My dad had that same calculator which he bought around in 1980/1981 while he was working in The Netherlands. When I was a Kid, I used to play with that and I was very fascinated with the display until I broke it one day and I tried to fix it in secret which finally led me to my interest in electronics.
Lovely restoration. I realise I'm dredging this one up a year on, but you could quite easily restore the green plastic/acrylic screen, I think. Do the old CA glue + masking tape trick to secure it to a small wooden block then sand it back to get below the deepest scratch. Then work back up to the finest grit you can find and finish with some polywatch. It'll look like new.
@@naromsky oh, interesting! I was surprised at the idea that it would be only grads and radians (I’m used to a 3-way option with those two plus degrees), but the two-way option with degrees and radians makes much more sense. Thanks!
Can't be many of those around left any more. It must have been pretty rate back in the 70s if it cost two months salary. As a calculator geek myself, I love these things!
I loved this calculator, in fact I love old calculators, both electronic and mechanical, the electronic ones in 1st place with the LED display and in the 2nd place with the plasma display, good job sir, really beautiful calculator
Seems to me like a USB-B would have been the best choice. It seems like it would be the perfect size and they’re extremely reliable. Pressing force might be too much though. Although I’m fairly certain I’ve seen them with mounting grooves.
Old video but I've had some good luck making my own power plugs for odd things like that. I use the connectors you would use on a computer that attach the mainboard to the front panel led's and switches. Cutting the connector apart and trimming you can get a single connector and wire (some connectors and wires will be destroyed). If the connector and wire fit well individually on the pins, I then use scrap plastic as spacers and glue the connectors into position (tacked together with super glue). I then remove the semi-completed assembly and carefully epoxy them together and shape to fit.
If you can find a stock of pins and female pin sockets from military-style connectors, you can build your own multi-pin connectors. In this cast you would plug on three sockets, mix up some epoxy or car filler and just cast it in there. You'd obviously need to paint on some wax or other release agent first. Maybe build a shell of sticky tape into the cavity before casting. Nice job, nice machine.
Your channel is underrated! The editing quality and content is amazing! I can't understand why you only have 20k subs. I bet in a couple of months you'll have at least a couple 100k
I came a little when the connector slid out. Jokes aside, Soviet repairability and engineering is really something else. They just don't make things like this anymore. Even to find a schematics that beautiful is nearly impossible. Man i wish our system wasn't based on profits so that they make it as hard as possible to repair something.
Those are NiCd cells. D-0,25 is the type number. Voltage is 1.2V. The manufacturer (JSC Rigel) once exported coin cells to the US but they've been under sanctions for over a decade. They even put the price of the cell on there- 53 kopeks.
Very nice refurbishing! I like your channel very much. I would have had 3d printed a Russian 5V plug to keep the device in an original shape. Turning the glass was an excellent idea! If you would polish the scratches it would look nicer. Even deepest scratches are easy to remove with sandpapers and polish. But, no complaining here, just some more ideas. Thank you for your nice work and sharing.
If the central angle in a circle is divided into 400 parts, i.e. each quarter of the circle has 100 parts, then each part is referred to as a grad or "grade". If the central angle in a circle is divided into 360 parts, i.e. each quarter of the circle has 90 parts, then each part is referred to as a degree (and denoted by an "o" on the right side, for example 90o if the central angle in a quarter circle). If the circle is divided into sectors, such that each arc length is equal to the radius of the circle, the central angle in such a sector is called a radian or rad. So, 1 grad = 910 degrees and 1 degree = 109 grad. 1 radian = 180π degrees and 1 degree = π180 radians = approximately 1 rad = 57.3 degrees. 1 grad = π200 radians and 1 radian = 200π grad.
The connector looks like one used on old Kenwood amateur radios in the 1980s. Look for TR2200, TR2200G, or GX connector. They aren’t common but you do see them around at junk sales etc.
Every part of it was made in USSR including the chip. Now, was it all completely designed in USSR? Probably not. There were quite a few chips surprisingly similar to existing western counterparts (e.g. entirety of i8080 ecosystem has its russian counterparts).
I've seen you try to get scratches out of plastic in a couple videos. I've had good luck with using really low grit to really high grit sand paper. Wet sanding while using the highest grits. Then, I use a the Novus 2 and Novus 1 to complete the polishing process. Works for clear and opaque plastics. Motorcycle riders use Novus products to repair their helmet visors
@@luna010 yup, quite right. 𝜏 (aka 2𝜋) radians = 360 degrees = 400 gradians, or grads. Many scientific calculators have modes for all 3 of these systems.
В 1978г я уговорил моих родителей купить мне калькулятор Б3-18М за 200руб. Это примерно была месячная зарплата моих родителей. Калькулятор был такой же конструкции, только в металлическом корпусе. Это было чудесное изделие! In 1978, I persuaded my parents to buy me a B3-18M calculator for 200 rubles. It was about the monthly salary of my parents. The calculator was of the same design, only in a metal case. It was a wonderful product!
The moment I spotted that integrated circuit package I thought the same: Rockwell Semiconductor. I wonder if it's an actual Rockwell chip, or a Soviet reverse engineering. Likewise, is the VFD (Vacuum Fluorescent Display) of Soviet or Japanese origin? My bet would be an import.
Scratches can be worked out of viewfinder plastic using T-Cut or PolyWatch, depending on how soft the plastic is. This goes for most viewfinder plastics. Just try a patch first and work carefully
I have an old CRAIG calculator that I found at a Goodwill. It doesn’t have the AC adapter nor any other type of power source. If I were to send it to you, could you bring it back to life just like how you did for this one? I’d pay you of course 🙂
It still makes me pause every time I see some old Russian product that has the price stamped into the product badge along with the part number and the serial number.
Привет, я из России. У меня где то лежит ещё один такой калькулятор в точно таком же состоянии. Не включается, но явно работающий. Вся проблема в питании, найти такое зарядное устройство очень сложно, но можно, а мне это не нужно. Если вам нужна эта вещ, то могу подарить.
It’s so asinine that people are salvaging rare and discontinued electronics like this. Imagine the Macintosh being just a myth in 100 years due to “poaching”
Ha, my father owned Electronika MK-61 when I was a little kid, and he even let me play with it! So many memories :)
So cool! Our great-grandchildren will look back on these devices as the tech that started it all!
epic@@ThomasBurns
Such A Brilliant Restoration Love from India👍
when you first turned on the calculator after restoration i feel very happy. Thank you for this types of video. Love from India
Thank you, Pandu!
@@ThomasBurns no sir pleasure is all mine
I had this calculator when I was a radioengineering student!
So sad that the beauty of those tube displays are almost lost to time now. I know there not efficient but damn are they gorgeous.
в 90х годах у меня было таких 2 штуки )) ностальгия спасибо за видео
This is truly awesome! I remember using this kind of Electronica calculator back in the depressive [very] early 1990s when I just went to school.
In contrast, in 1973 I graduated from high school, and was going to go to university, studying electrical engineering. I had a low paying summer job working at a city run day camp. All summer I saved to buy an HP-35, I was very happy that the price had dropped from $450 to $350. At the end of summer I had nearly enough, I think my father helped a bit, at least getting a bit of a discount by buying it at work (he worked for a large engineering firm) Four years later as a fresh out EE I was making $14400 a year, So I guess a new EE in 1973 would get $12,000 or $13,000., or more than $1000 a month. So in 1972 an HP-35 would cost a new engineer in the USA about 1/3 of a months pay. When I was a senior in school my HP-35 was stolen and I replaced it with a far cheaper TI calculator, which while much more cheaply manufactured had slightly more functions. It cost less than $100. Luckily the HP-35 was returned to me in a few weeks, and I have it still, and it still works. Not so with the TI calculator. It bet the TI calculator was comparable or better than the calculator featured here.
You mentioned the switch for grad and rad: they're standard calaulcator modes for specifying what "units" the angles are when doing sin/cos/tan etc. a "grad" is like a degree only there are 400 to a circle instead of 360. "rad" is for radians, where pi radians (3.14...) is the same as 180 degrees.
My dad had that same calculator which he bought around in 1980/1981 while he was working in The Netherlands. When I was a Kid, I used to play with that and I was very fascinated with the display until I broke it one day and I tried to fix it in secret which finally led me to my interest in electronics.
Lovely restoration. I realise I'm dredging this one up a year on, but you could quite easily restore the green plastic/acrylic screen, I think. Do the old CA glue + masking tape trick to secure it to a small wooden block then sand it back to get below the deepest scratch. Then work back up to the finest grit you can find and finish with some polywatch. It'll look like new.
That’s a great tip, Mark! Will incorporate in the future!
Grads vs radians? 1 Grads = 0.0157 Radians
400 Gradians = 2π Radians = 360 Degrees
@@wompastompa3692 Yup! Which also = 𝜏 radians. :D
Just for the record. Grad stands for градус, which means degree, not gradians.
@@naromsky oh, interesting! I was surprised at the idea that it would be only grads and radians (I’m used to a 3-way option with those two plus degrees), but the two-way option with degrees and radians makes much more sense. Thanks!
Me watching smart people discuss things 🤡
Thank you for giving these devices new life.
Can't be many of those around left any more. It must have been pretty rate back in the 70s if it cost two months salary. As a calculator geek myself, I love these things!
Fewer and fewer every day, I’m afraid. It’s up to us to save them. :)
I loved this calculator, in fact I love old calculators, both electronic and mechanical, the electronic ones in 1st place with the LED display and in the 2nd place with the plasma display, good job sir, really beautiful calculator
I would have kept the original power connector and made up a matching one with female ic socket pins or female Dupont pins and a body of epoxy putty.
Great video. Thank you for restoring this wonderful example of 197s engineering excellence.
Thanks for watching!
I love that you're doing this. Keep it up!
Thank you, Tyler!
Seems to me like a USB-B would have been the best choice. It seems like it would be the perfect size and they’re extremely reliable. Pressing force might be too much though. Although I’m fairly certain I’ve seen them with mounting grooves.
I am so glad you did a video of this. Exquisite!
Glad you enjoyed it!
Old video but I've had some good luck making my own power plugs for odd things like that. I use the connectors you would use on a computer that attach the mainboard to the front panel led's and switches. Cutting the connector apart and trimming you can get a single connector and wire (some connectors and wires will be destroyed). If the connector and wire fit well individually on the pins, I then use scrap plastic as spacers and glue the connectors into position (tacked together with super glue). I then remove the semi-completed assembly and carefully epoxy them together and shape to fit.
If you can find a stock of pins and female pin sockets from military-style connectors, you can build your own multi-pin connectors. In this cast you would plug on three sockets, mix up some epoxy or car filler and just cast it in there. You'd obviously need to paint on some wax or other release agent first. Maybe build a shell of sticky tape into the cavity before casting.
Nice job, nice machine.
Awesome restoration!!
Thank you!
Your channel is underrated! The editing quality and content is amazing! I can't understand why you only have 20k subs. I bet in a couple of months you'll have at least a couple 100k
Thanks so much, Gummel!
I came a little when the connector slid out. Jokes aside, Soviet repairability and engineering is really something else. They just don't make things like this anymore. Even to find a schematics that beautiful is nearly impossible.
Man i wish our system wasn't based on profits so that they make it as hard as possible to repair something.
Amazing! I read about these in the Tetris book "The Tetris Effect"
What a nice piece of tech!
Thank you, Elina!
Those are NiCd cells. D-0,25 is the type number. Voltage is 1.2V. The manufacturer (JSC Rigel) once exported coin cells to the US but they've been under sanctions for over a decade. They even put the price of the cell on there- 53 kopeks.
good work, I think Grad and Rad are degree (angle) measuring unit systems
Very nice refurbishing! I like your channel very much. I would have had 3d printed a Russian 5V plug to keep the device in an original shape. Turning the glass was an excellent idea! If you would polish the scratches it would look nicer. Even deepest scratches are easy to remove with sandpapers and polish. But, no complaining here, just some more ideas. Thank you for your nice work and sharing.
Thanks so much for watching!
If the central angle in a circle is divided into 400 parts, i.e. each quarter of the circle has 100 parts, then each part is referred to as a grad or "grade".
If the central angle in a circle is divided into 360 parts, i.e. each quarter of the circle has 90 parts, then each part is referred to as a degree (and denoted by an "o" on the right side, for example 90o if the central angle in a quarter circle).
If the circle is divided into sectors, such that each arc length is equal to the radius of the circle, the central angle in such a sector is called a radian or rad.
So, 1 grad = 910 degrees and 1 degree = 109 grad.
1 radian = 180π degrees and 1 degree = π180 radians = approximately 1 rad = 57.3 degrees.
1 grad = π200 radians and 1 radian = 200π grad.
The connector looks like one used on old Kenwood amateur radios in the 1980s. Look for TR2200, TR2200G, or GX connector. They aren’t common but you do see them around at junk sales etc.
Great Restoration!
See the Rockwell 61R; almost certainly the chip was Japanese but the remainder is locally produced
Thank you, Dave! Will check out the Rockwell 61R!
Every part of it was made in USSR including the chip. Now, was it all completely designed in USSR? Probably not. There were quite a few chips surprisingly similar to existing western counterparts (e.g. entirety of i8080 ecosystem has its russian counterparts).
I've seen you try to get scratches out of plastic in a couple videos. I've had good luck with using really low grit to really high grit sand paper. Wet sanding while using the highest grits. Then, I use a the Novus 2 and Novus 1 to complete the polishing process. Works for clear and opaque plastics. Motorcycle riders use Novus products to repair their helmet visors
This is an awesome suggestion! Thank you, Tim!
Display beautiful, i like
You can get them scratches out with buffing compound and a buffer wheel, I worked at a place that refurbished cash registers.
grad and rad are "degrees" and "radians", a type of measure for angles.
Thank you, Jose!
I'm pretty sure grad is used to mean gradians, not degrees.
90 degrees = 100 gradians
@@luna010 yup, quite right. 𝜏 (aka 2𝜋) radians = 360 degrees = 400 gradians, or grads. Many scientific calculators have modes for all 3 of these systems.
With a 3d printer, you could print your own custom fittings, for say that usb-c port and such ! :)
12:02 "scavengers" such a correct word, needs to be used on russian youtube as well...
В 1978г я уговорил моих родителей купить мне калькулятор Б3-18М за 200руб. Это примерно была месячная зарплата моих родителей.
Калькулятор был такой же конструкции, только в металлическом корпусе. Это было чудесное изделие!
In 1978, I persuaded my parents to buy me a B3-18M calculator for 200 rubles. It was about the monthly salary of my parents.
The calculator was of the same design, only in a metal case. It was a wonderful product!
Excellent restoration and great video 👏👏👏
Thank you!
It looks very much like a clone of the Rockwell 61R calculator.
The moment I spotted that integrated circuit package I thought the same: Rockwell Semiconductor.
I wonder if it's an actual Rockwell chip, or a Soviet reverse engineering.
Likewise, is the VFD (Vacuum Fluorescent Display) of Soviet or Japanese origin? My bet would be an import.
Scratches can be worked out of viewfinder plastic using T-Cut or PolyWatch, depending on how soft the plastic is. This goes for most viewfinder plastics. Just try a patch first and work carefully
Fun fact, in the 80s the average monthly salary in the Soviet Union was about 135 rubles.
The price of the calculator was 220 rubles
I think back then the robble and dollar were equal.
I have an old CRAIG calculator that I found at a Goodwill. It doesn’t have the AC adapter nor any other type of power source. If I were to send it to you, could you bring it back to life just like how you did for this one? I’d pay you of course 🙂
That would've been pretty great if that could've had a USB-C port. Kinda trolly if it ended up with a lightning port. :p
Hahaha yes! But even USB-C won’t be around too much longer. The traditional round DC jack, however, has stood the test of time. :)
на этой лампе можно сделать часы, удалив все внутренности, установив Arduino c повышающим DC-DC для анода лампы.
Классно!🎉
You’re amazing and I love your videos. Are you also this good with software? Can you program? You are a dangerou man 😊.
Thank you! Programming is definitely my weak side, but so far all my programming has been relatively simple Arduino scripts. :)
It still makes me pause every time I see some old Russian product that has the price stamped into the product badge along with the part number and the serial number.
How about changing the display to LCD display
❤from🇧🇩
They had big pockets
I *love* your videos. I got into Russian watches on eBay a while ago - I wish I had the ability to find these things!! Where do y'all source?
Most of it comes from local markets in Tbilisi. Sometimes I have friends bring it from Moscow. Thanks so much for watching!
That's one huge "pocket" calculator, even for 76 thats that's big right?
I thought it was -5v did you have to change something???
Yes I reversed the leads on the calculator’s connector to get the -5V.
@@ThomasBurns I re-watched nice work.
i have the same but i have no power adapter or batteries
Привет, я из России. У меня где то лежит ещё один такой калькулятор в точно таком же состоянии. Не включается, но явно работающий. Вся проблема в питании, найти такое зарядное устройство очень сложно, но можно, а мне это не нужно. Если вам нужна эта вещ, то могу подарить.
Вы в Тбилиси?
@@ThomasBurns нет я из Росии, а что?
We can have this but we still can't have a tablet with LCARS
I think it’s time for you to get 3D printer for this plug hole kind of problems :)
Yes! It’s on my tools wishlist, but as you can probably imagine, the list is long. :)
хорошый апарат
What about wireless charging!
easy why 9 was used so many times, 19.99 ; 39.99 ; 7.99
and because it means "no" in German.
I'm not worthy.
This would be kinda cool, if I were Russian. 😅
It’s so asinine that people are salvaging rare and discontinued electronics like this. Imagine the Macintosh being just a myth in 100 years due to “poaching”
ооо,изобретения былой цивилизации (inventions of a former civilization)