Author Topic: EEVblog #749 - Mailbag  (Read 11426 times)

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Offline EEVblog

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EEVblog #749 - Mailbag
« on: June 02, 2015, 11:30:35 pm »
Another Mailbag, Dave opens his mail. What have people sent in this week?



SPOILERS:
Tekbox self powered active load: http://www.tekbox.net/test-equipment/tboh02-self-powered-active-load
Original Sony TPS-L2 Walkman from 1979
Sony DAT Walkman
Sony Video Walkman
Matrix SR4000 autochromatic tuner
SunStar 1:18 scale Delorean Time Machine
Soviet Union Elecktronika MK52 Calculator
http://en.wikipedia.org/wiki/Elektronika_MK-52
 

Offline richfiles

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Re: EEVblog #749 - Mailbag
« Reply #1 on: June 03, 2015, 01:10:36 am »
Those Soviet calculators... They ALL had HORRIBLE keyboards. My collection covers the years 1976-1992... NOT ONE GOOD KEYBOARD between the lot of 'em!  :palm:

I have an Elektronika 4-71b (a 1976 desktop 4 banger), An Elektronika B3-05 (another desktop 4 banger), Mky-1 (A 1989 desktop scientific), mk-61 (a handheld scientific), and a pair of MC 1103... Which is a desktop RPN programmable calculator made for controlling and monitoring external processes. It contains internal ADCs for measuring voltages of +/-9.99V (8 channels).


My 4-71b is pretty beat up, but it still works. I can pop off the left side of the top cover, cause it's all cracked. It's okay... I like my calculators topless!  :-DD


The Elektronika Mky is the black calculator to the left of the 4-71b and next to the Fallout 3 "Vault-Tec" lunch box and the ANITA Mk-7 nixie/thyratron all tube decade counter boards.

Links to pages with very good descriptions and photos of many Soviet calculators. These are the models I own.

http://www.leningrad.su/museum/show_calc.php?n=12 Elektronika 4-71b
http://www.leningrad.su/museum/show_calc.php?n=27 Elektronika B3-05
http://www.leningrad.su/museum/show_calc.php?n=165 Elektronika MK-61
http://www.leningrad.su/museum/show_calc.php?n=181 Elektronika MKU-1 (Cyrillic makes it look like Mky-1)
http://www.leningrad.su/museum/show_calc.php?n=132 Elektronika MC 1103
« Last Edit: June 03, 2015, 06:40:34 am by richfiles »
 

Online dr.diesel

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Re: EEVblog #749 - Mailbag
« Reply #2 on: June 03, 2015, 01:12:36 am »
What, no zombie stabbin k-nife?

Offline free_electron

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Re: EEVblog #749 - Mailbag
« Reply #3 on: June 03, 2015, 03:15:32 am »
i suspect russion calaulcators automatically subtract a percentage of the outcome to go to the polit party treasury chest ...
Professional Electron Wrangler.
Any comments, or points of view expressed, are my own and not endorsed , induced or compensated by my employer(s).
 

Offline EEVblog

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Re: EEVblog #749 - Mailbag
« Reply #4 on: June 03, 2015, 03:40:57 am »
What, no zombie stabbin k-nife?

Oh, damn, did I completely forget that?  :palm:
 

Offline richfiles

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Re: EEVblog #749 - Mailbag
« Reply #5 on: June 03, 2015, 05:12:32 am »
What I always found intriguing, whenever I added a Soviet device into my collection, is how ALIEN they appeared inside. Dave pretty much pointed out the oddities in his mk-52. Strange chip packages, odd ways of doing things, etc. My Mky-1 has a metal can chip, a staggered lead chip, and a "wrongly sized" DIP, that is just scaled too big for it's pin count. It uses a VFD in a cylindrical tube, like an elongated radio style tube... and it was made in 1989 (or maybe 1990). Inside my 4-71b, I had initially thought a fuse holder was a choke or inductor at one point, early on. It was just different. The sizing and overall configuration seemed off...

What it was, was the effect of the cold war. While The US and Europe had open standards between one another, imported and exported, and embraced low cost asian manufacturing, effectively unifying the design styles for electronic component standards across the US, Europe and Asia, the USSR was always the odd one out. The US and Europe and Asia played "Keep away" with the USSR. They had to get products across the border and reverse engineer things. We point our fingers at China today, when it comes to knockoff products, but you ought to look up some of Russia's knockoff calculator (and more) designs! Some knockoffs are simply beyond blatant (http://www.leningrad.su/museum/show_calc.php?n=26 Elektronika B3-04). They learned a lot by taking apart US, european, and asian calculators. They even had a functional knockoff of the HP 9100 (http://www.leningrad.su/museum/show_calc.php?n=211 Elektronika T3-16)!

Hey, at least the documentation in Soviet Russia was good...  :clap:
In Soviet Russia, tech support provide by you, worker.  :P
« Last Edit: June 03, 2015, 06:38:10 am by richfiles »
 

Offline JBaughb

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Re: EEVblog #749 - Mailbag
« Reply #6 on: June 03, 2015, 05:53:00 am »
Glad the calculator arrived safely. Old Soviet tech is so interesting to me...mainly for the reasons people have already mentioned.
 

Offline tchicago

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Re: EEVblog #749 - Mailbag
« Reply #7 on: June 03, 2015, 06:53:31 am »
That programmable calculator, along with MK-54 and MK-61 were the only programmable devices accessible for education in 80s and early 90s. The real computers, even 8-bit ones were very rare.

Here is what programs looked like: http://www.patlah.ru/etm/etm-10/tv-anten/tv%20spytnik/mikrokalkylator/mk-5.jpg

And also attached is the schematic diagram. Someone took time to redraw it from the original manual. That large plastic chip KP1601PP1 is actually the 1K x 4 EEPROM. The rest of them are ASICs, besides some jellybeans like CMOS variant of 7400 and shift registers.
« Last Edit: June 03, 2015, 06:58:27 am by tchicago »
 

Offline McBryce

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Re: EEVblog #749 - Mailbag
« Reply #8 on: June 03, 2015, 08:44:55 am »
Hi Dave,
    relax, the German T-Shirt just says "You shouldn't lie".

McBryce.
 

Offline Solberg

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Re: EEVblog #749 - Mailbag
« Reply #9 on: June 03, 2015, 09:56:56 am »
At 6:32 China export logo. Didn't know Romania was part of china. :-DD
 

Offline Deathwish

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Re: EEVblog #749 - Mailbag
« Reply #10 on: June 03, 2015, 10:47:29 am »
What, no zombie stabbin k-nife?

I am waiting for him to upgrade to a Katana  :-DD .
Electrons are typically male, always looking for any hole to get into.
trying to strangle someone who talks out of their rectal cavity will fail, they can still breath.
God hates North Wales, he has put my home address on the blacklist of all couriers with instructions to divert all parcels.
 

Offline halexa

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Re: EEVblog #749 - Mailbag
« Reply #11 on: June 03, 2015, 02:31:02 pm »
Hi Dave!

I have a fully working Sony Walkman MD player (http://www.minidisc.org/part_Sony_MZ-E25.html)  collection dust in the basement if you want it for your sony walkman episode.
I will take some time to ship it from Sweden though.
 

Offline 8086

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Re: EEVblog #749 - Mailbag
« Reply #12 on: June 03, 2015, 03:49:34 pm »
Interestingly there is a GV-9E on ebay with the same faults dave described...must be common issues.

http://www.ebay.co.uk/itm/Sony-GV-9E-Video-Walkman-8mm-TV-UHF-VHF-/191589524752
 

Offline SeanB

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Re: EEVblog #749 - Mailbag
« Reply #13 on: June 03, 2015, 05:29:01 pm »
Just looked today, and still have some DAt data cassettes, though I did toss the full box of NIB ones that are no longer used. Still have to look for the few later generation ones if Dave is interested to add them to his collection.
 

Offline Grapsus

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Re: EEVblog #749 - Mailbag
« Reply #14 on: June 03, 2015, 08:23:31 pm »
When we see the back of the calculator, there is a date code: 90 10. This turd was being manufactured when I was already born  :(

Did you notice the small bright orange components ? those are transistors, I've never seen this package outside soviet equipment.
 

Offline lewis

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Offline bitwelder

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Re: EEVblog #749 - Mailbag
« Reply #16 on: June 07, 2015, 03:43:07 pm »
The smallest type of Parrot clip seems to be 72mm long.
Is there something similar, i.e. some kind of a mini-grabber but with the tip normally exposed, of a smaller size (30-40mm) ?
I'd like to replace some mini-alligators with something that has a finer gripping tip.
« Last Edit: June 07, 2015, 03:46:38 pm by bitwelder »
 

Offline hikariuk

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Re: EEVblog #749 - Mailbag
« Reply #17 on: June 07, 2015, 04:44:18 pm »


I love the fact that you have a Vault-Tec lunchbox in there :)
I write software.  I'd far rather be doing something else.
 

Offline SeanB

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Re: EEVblog #749 - Mailbag
« Reply #18 on: June 07, 2015, 04:59:22 pm »
Still have an HP DAT data drive, though it is both SCSI and dead from wear.  Still the mechanism inside ( and the tapes) looks identical to the Sony unit, probably was made by Sony for HP, when I take it apart it will probably be full of Sony part numbers inside. Even still have the DAT cleaning tape, and a few of the archives data sets, on the massive 2G tapes........

I did a restore years ago, and it all is still sitting on my local hard drive after a few migrations, only a small bit of used space there......
 

Offline Wytnucls

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Re: EEVblog #749 - Mailbag
« Reply #19 on: June 07, 2015, 06:43:52 pm »
Interestingly there is a GV-9E on ebay with the same faults dave described...must be common issues.

http://www.ebay.co.uk/itm/Sony-GV-9E-Video-Walkman-8mm-TV-UHF-VHF-/191589524752
Pulled mine out of the cobwebs and it's still working fine.
 

Offline axel15

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Re: EEVblog #749 - Mailbag
« Reply #20 on: July 18, 2015, 12:24:08 pm »
Nice DC load design. Built one.
 


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