EEVblog

[@OfficialDoayee]

Cheers Dave! Tom here (creator of BAL) :) Thanks for the positive comments. In explanation, the burn mark is from the reflow hot plate we were trying, it was our first try using it and we got the temp a little high, whoops! Ah well, won't happen on the real thing

[@truck93]

"Duck Tape" is a brand as well it WAS used for air Ducts (now they use the aluminum tape). The word Duck in Duck Tape comes from the embedded interwoven cloth fibers in the tape. Another definition of Duck is "a strong linen or cotton fabric, used chiefly for casual or work clothes and sails." So "Duck Tape" is correct, since it translates to "Interwoven fiber Tape".

[@stephenoliveau]

truck93 i would agree if duck wasn't a brand... however, there is only one maker of duck tape. on a side note, none of that stuff (generic "duct" or Duck brand) is rated for the duct work most people will encounter. it is really only suitable as a temporary general purpose adhesive.

[@rich1051414]

truck93 Um, but even duck tape says Duct Tape on the package... 'Duck brand Duct tape'... I have heard your argument, and I think it's a bunch of nonsense xD If Duck brand duct tape even calls it duct tape, It is duct tape.

[@stephenoliveau]

MichaelKingsfordGray nope. gaffer tape comes off relatively easily and leaves little residue, as it is intended to do. some brands of duct tape (and some masking tape) only make those claims if used for very short periods of time. if you are trying to secure actual ducting, you need to use very expensive (comparatively) foil tape, which is fire resistant unlike duct tape.

[@rich1051414]

MichaelKingsfordGray I always called that HVAC tape. Gaffers tape is different from both duct tape and foil tape... it is cloth, like blue jean cloth, tape. I am not sure you can even buy it in america outside of surplus shops. Not sure about your guys' individual countries, I know its available in the UK, and they confuse it with duct tape a lot, but its different.

[@thomasfuchs78]

I confirm, that people around here (east coast) use both duck tape and duct tape, the former referring to the brand, the latter to the use for the tape. So both forms are correct, but depending on where you are there may be a more common version.

[@Freyr77]

Always puts a smile on my face when I see you have uploaded

[@GadgetAddict]

There's a popular brand of duct tape called duck tape, I wonder if that adds to the confusion. For the 3D printed duck, you Just pause the print, insert object, resume ;)

[@evilplaguedoctor5158]

Gadget Addict that's silly. it's magic!

[@TheBrightPixel]

MichaelKingsfordGray To me, it wall always be 'Gaffa' (film set lighting guy) tape

[@TheBrightPixel]

I noticed I spelled it wrong after I posted it, but I'm afraid that it's just not as important to me as it seems to be to you.I have no desire to watch every film credit in history

[@Thermoelectric7]

The Bright Pixel Oi Bazza, check out that sheila laying out the gaffa tape!

[@TheBrightPixel]

Thermoelectric7 hahaha. Precisely!

[@417weston]

Very nice to see the Casio fx-3800P. I bought mine in 1991, cost me about £20, and it has served me well. I think it is on only its second battery. I use it regularly and I much prefer its simple input to the modern ones with all the bells and whistles.

[@sandmanxo]

I can't believe someone sent a X68000 for teardown. Unless it's completely shot it's probably worth fixing.

[@bsvenss2]

sandman x Read on Wikipedia that it was kind of the japanese version of the Amiga computer. Very similar HW and the games were easy to port.

[@Ace9921]

sandman x I would expect the power supply to have bad capacitors on it if the computer doesn't work. This is quite possibly the X68000's biggest flaw.

[@sopothetocho]

sandman x I was about to say that, I would kill for one of those, image all the retro games you could play on it. I would be happy just with the kickass version of Castlevania this thing has. :P

[@allluckyseven]

Happy birthday, Sagan!

[@markhodgson2348]

Good luck with all the Kickstarters projects

[@FSdarkkilla]

Hey Dave I used to have exactly this meter when I was a kid. (The one from 3/67.) "Elektrische Daten" is not the name of the company, it means "electrical data" or "electrical characteristics". The manufacturer was "Elektro-Apparate-Werke Berlin-Treptow „Friedrich Ebert“" ("Electrical Equipment Factories" Berlin-Treprow [a disctrict in Berlin]) and it was made in the former GDR.

[@douro20]

On that Hitachi PLC, the ports for MIC and EAR on the front are for a cassette recorder for storing and retrieving macros.

[@sauerdrops484]

Hei Dave, nice to see the East German meter. I had the same, it was my first meter :-) The red button is not for overload protection. To do a measurement you have to push down the range selection knob after you seleted your range. With the red button you can release the knob.

[@ChipGuy]

Around 9:30: SEEQ 2816 is a 2Kx8 EEPROM, very common at that time.

[@BJ40films]

Hi Dave! Coolblue is a big internet store here in the Netherlands, they sell pretty much everything, mainly consumer electronics, but also toys, radios, garden stuff, kitchen stuff etc etc etc. Awesome stuff as always in this mailbag by the way!

[@Alexander-iv9vd]

Do not be surprised if you get contacted by a lot of gaming channels for that X68000. That system is one of the harder pieces to get in your video game console collection, even if it is broken.

[@robvangils4218]

Great to hear u liked the stuff I send in

[@nickguy6820]

How does the cap get in the duck? Psh.. easy. You drop in a SMT ceramic cap, water it regularly and ensure adequate light, and it grows into an electrolytic. Oldest trick in the book. +1 for patience, though.

[@MaxDJsWorkshop]

The mic and ear connectors on the hitachi plc are for program storage and recall....

[@zeuss194]

@ hitachi PLC, RY is probably for RelaY output, slower but more current/voltage handling on these output usually

[@zeuss194]

zeuss194 well didnt watched fully my bad

[@GBlunted]

Ry is typical labeling for Relays. Like Q for transistors and VR for Variable Resistors etc.

[@ChipGuy]

Around 40:00, the meter: Manufacturer is EAW, "Elektro Apparate Werke" (=Electro Apparatus Factory) in East Germany. They were made in East Berlin, the Soviet sector. That explains the crusty old Russian like design. West German products from that era were a bit more modern and eventualle getty way ahead in technology in the 80's.

[@seepoowoop]

Nice to see you dave!

[@onjofilms]

Yes, as AR says, RY is Relay Output.

[@10100rsn]

A thermistor with heat shrink on it is usually a simple inrush current limiter. Heat shrink added just in case it explodes...

[@commodork]

The reason that proto-PLC may have earphone\microphone connectors is to program it using an audiocassette.

[@uriituw]

Is it just me, or is the audio out of sync?

[@EEVblog]

uriituw Not for me

[@TheJttv]

EEVblog it seems ever so slightly behind the video but I only noticed it after he pointed it out

[@funkyironman69]

uriituw Australian internet is so slow I'm happy if youtube videos play at all. :)

[@RyanUptonInnovator]

uriituw Australians are often behind and slightly out of sync.

[@Diamonddrake]

uriituw Worked fine for me, in sync and HD

[@douro20]

Some of the older Dell notebook power supplies had very good internal construction... I was quite surprised to see Nichicon RX30 (130 deg. C) capacitors in the ones I used to have.

[@Joekutz]

The "dodgyness" of the old meter's select wheel goes away when you press the wheel (it is also a button that clicks in) - only then, the thing also measures. Pity that it broke on the way from me to you.

[@illustriouschin]

Mailbag Mondays are worth watching on the big tv with couch and popcorn and coffee or beer hooray!

[@electronicsNmore]

You are going to have to rent a storage unit soon to have a place to keep all the stuff you keep acquiring. :-).

[@bfriesen75]

Awesome, I'm looking forward to the X68000 teardown!

[@CaptmagiKono]

Do you ever fear running out of room for all of the things people mail you? If so, what do you plan on doing with said items if it does become a problem?

[@trevordobbins_]

another great mail bag dave! keep them coming! ABB has a facility here in St. Louis, Missouri.

[@TUnit959]

If that X68000 works it's worth a fair bit. Breaking out the big ones first today.

[@jaa93997]

Ry output = relay output, dry contact

[@h4xliv]

Hey Dave! It looks, like the Multimeter is made by Hartmann & Braun. They are quite distinctive with the connectors on top. Best wishes from Germany!

[@eddy66t6]

Ry usually indicates relay output on a PLC

[@eddy66t6]

eddy66t6 nevermind.....

[@petersage5157]

14:00 For the longest time I thought it was originally "duct tape" as well, and that the Duck Tape brand came later, but that's entirely back-to-front. It was originally developed as a water exclusion tape for ammo cans, and as such one of its many nicknames was "duck tape" after the way water rolls off its outer latex layer. Incidentally, just in case anyone reading this has managed to miss the memo, it's the second worst tape for sealing ducts.

[@profpep]

Audio ports on the PLC programmer are for cassette tape program storage. Real vintage! The Seeq 2816 is a very early flash memory, common in PLCs of the era as program storage. They were mainly pin compatible with 2716 EPROMS, if you wanted more permanent storage.

[@jtsiomb]

The "stereoscopic" port looks like a standard VESA stereoscopic synchronization signal connector. It's for syncing shutter glasses for stereoscopic viewing (3D as the marketing drones would call it). You will find similar ports on old Silicon Graphics (SGI) workstations, or "professional" graphics cards for PCs like nvidia quadro and ATI firegl.

[@Keesz1]

Coolblue is a popular post-order company in The Netherlands. Their boxes are famous for their Pantone colour and they deliver really fast. Within 24 hours even on a Sunday and on workdays the same day.

[@RVProject]

You are correct that the original tape was Duct Tape. But these days anything is possible. There is also a "Duck" brand of Duct Tape sold in the US.

[@pvc988]

At 9:00 that IC5 is a 2816 EEPROM

[@itsGeorgeAgain]

oh god you got a sharp... you got a sharp. I friggin love the design of that thing.

[@TheSparkst3r]

The resistors you mentioned in the German multimeter are often known as dogbone resistors because of their shape. I'm not sure if they have a official package designation. There were many shapes of resistor, often brands had their own design but they were all referred to as dogbone.

[@fagear]

***** There were resistors in the same package in USSR. Type "ВС" (cyrillic), stands for "водостойкие" i.e. "waterproof": cepebpo.narod.ru/cyrje/radiodetali/resistor-vs.htm savepic.net/4823913.jpg

[@adamadamhoney]

EEVblog Casio 3800p did come with the wallet (i think) my Dad had one that looked exactly like that, and probably still does! Used to love it as a kid, just felt so much better than any calculator i ever had in school!

[@Michael_Michaels]

Watching Dave eating chocolate, made me want some too!!!

[@waqaszahid86]

I wonder if that knife is even legal to keep, your videos are fun to watch dave, keep up the good work!

[@Stjaernljus]

***** has some really good videos on repair and overview of the sharp x68000.

[@nicwilson89]

SandyStarchild I don't think it'll be a detructive teardown. Nothing wrong with taking nice things apart to have a look if you can put them back together :p

[@nicwilson89]

klarusboy Indeed!

[@douro20]

SASI is actually the direct predecessor to SCSI, developed at Shugart Associates, the same people who developed the ST-506 interface which was popular for a long time prior to IDE.

[@Diggnuts]

I'm rather very interested in where the German multimeter was made. The guy who send it was from Leipzig which was in the GDR in the 60's, but the unit only says make in "germany" of which there were, at that time, two. So was this a device not meant for export? I have several east and west German things and most make a point of stating they were made in the DDR/GDR or the BRD or west Germany. Wots the deal!?

[@ayrendraganas8686]

nope that was not the company at 36:25 it said "electric data" if you translate it

[@lillydoye7418]

Green tea KitKats are one of my favourite sweets. They sound odd, but eat one and you will be forever smitten.

[@kemi242]

42:37 Held it upside down. All the electrons fell out!

[@ForViewingOnly]

The audio seems 'different' somehow in this video. Maybe Dave had the mic AGC switched on cos the noise gets louder sometimes in quiet sections. I'm watching on a tablet so can't be 100% sure. Anyway, doesn't matter, great video Dave.

[@ForViewingOnly]

I don't think it's AGC, but there's either some hissing or compression artifacts in the audio in the wide angle shots of Dave at his desk, then the audio is fine on the closeup shots. Only noticed cos I'm listening in a quite room.

[@TheScrappingJeahaha]

36:20 Elektrische Daten isn't the Company Name, it stand for electrical specs ;D Greetings from Germany

[@nollid96]

Does anyone know what the flashing LED on the Asmyldof card is? Is it just random flashing, or some code.

[@mikesveganlife4359]

love these tear downs of old equipment. Reminds me of my childhood when my Dad would bring home malfunctioning equipment from Control Data Corporation. My brother and I would take the stuff apart and take a look at all the chips and boards. At age 8 had no clue what anything did but we would hook wires to 9 volt batteries and sometime get some lamps to light up on the boards. SciFi nerds then we let our imaginations really roam with the buttons and lights and boards.

[@zx8401ztv]

Ahh the old multimeters, loverly old tech :-D

[@aserta]

People in Japan (whether Japanese or not, if they've been there a while) know how to pack. I get packages from all over the world, haven't seen attention to packing quite like it.

[@armenatorvan4949]

Fairly sure I already saw a 5V to 12V USB boost converter on ebay today. Not as nicely made I guess but still...

[@dumle29]

Those caramel waffles are awesome. They sometimes pop up here in Denmark now and then.

[@Smidge204]

"Duck tape" is actually the ancestor to modern day duct tape, named after the type of cloth it was made with. Also, modern day duct tape should not, ironically, be used on HVAC duct work since the heating and cooling ruins the adhesive.

[@plecebomc]

Those sharp computers are niche but very collectable in said market ;) lucky dog

[@Ilovelazers]

I think the burn marks are from a homemade reflow oven that was set too hot.

[@kg4boj]

All that paper and tape is getting the crocodile dundee knife ' s tip dull. Time to strop and hone that blade with a piece of leather.

[@ThePobolycwm]

cant fault the heatshrink kits, always have a few on the go

[@redtails]

1:10 Matcha flavoured Kitkat??

[@bryndal36]

looking on ebay Australia and there's only 2 X68000's and the model you have is going for over $3000. nice

[@LynkedVideos]

Dave, you should try figuring out the Morse Code on those business cards... starting at 27:40, the green LED flashes the word "Dave." ;o)

[@MatMabee]

I have an old Ricoh Mirai autofocus camera from the 80s that I'd love to see in a teardown. I just haven't gotten the resources to ship it. Great work as always Dave!

[@netsurferx1]

13:49 Dave: "It's green!" Mr. Data: "Yes, it is green." Sorry, had to!

[@Chemnitzsurfer]

The multimeter from 34,00 was an east German product, produced by de.wikipedia.org/wiki/Elektro-Apparate-Werke_Berlin-Treptow_%E2%80%9EFriedrich_Ebert%E2%80%9C

[@Tjita1]

You're actually wrong. It is duck tape. Noone has ever used duck tape to tape any ducts. However, as it happens, duck is an old English word that means weave or fabric.

[@DanielBos]

Ah, "Koetjes reep"... I used to get those from my grandma when we visited as a kid (30 odd years ago)

[@ABaumstumpf]

36:20 Elektrische Daten : It is 'electrical data' or just and old way of saying specifications - so no company -name. But it looks familiar. And the case - the broken part looks a bit greenish - maybe you got lucky and this is made from Bakelite. Hm... now that i think about it - i might still have an old digital multimeter laying around somewhere. Maybe i can get around and find it... lets see how much shipping would cost.

[@LeeRyman]

Someone actually managed to silence Dave for a whole 7 seconds, the secret? Chocolate! ;)

[@TheSkytherMod]

Dave, I'm from Melbourne, Australia. Do you know of any stores that I'd be able to get components from? Thanks

[@snowjhon]

It's funny because it's forbidden to advertise "koetjesreep" as chocolate in Belgium because the cacao content is not high enough to qualify as real chocolate

[@FaSMaN]

That Sharp X6800 is the only great of Japanese retro computers I am so jealous!!!

[@LukasFink1]

"Technische Daten" is german for "specifications". I don't think it's a company

[@aknewhope]

I believe that ABB power supply is made by a company called Puls Power. I build industrial automated equipment and use Puls power supplies on every machine. They look exactly the same, with the same case design, round surface mount resistors, high end components, and are known to build private labeled supplies for many companies. The new models from Puls are a quarter the width for the same power output. Never had one fail either, unlike the cheap brands. So in essence, you get what you pay for. I took some pictures of one recently. flic.kr/s/aHskbZm3PG

[@WestSideJooo]

Do you ever have to pay import taxes / duties for these mailbag items?

[@PeterBrand96]

"elektrische Daten" means "electrical specifications"

[@Shadowdncer]

Peter Brand would be an awesome brand name though ☺ (band name too)

[@rbsphoenix1]

Peter BrandEEVblog yes, its not the company. The company's name is "Elektro-Apparate-Werke (EAW)". The Logo is on the top-right corner (@ 36:05)

[@RitusG]

Actually duck tape was in use before duct tape came into use. Duck tape started in the early 1900's, duct tape didn't come into use until the late 20's. Always thought the same thing, but duck tape is a thing. Check wikipedia for the history, it's kinda interesting.

[@Direkin]

Heh! "I wonder what processor the X68000 uses". The Motorola 68000 is a very obvious guess. And there's nothing wrong with matcha flavoured Kit Kat.

[@Murphistic]

I guess, words 'Relax, I'm professional' were said before many accidents.

[@funkyironman69]

That computers a beast, a full 4MHz X1 processor!

[@allenwest1986]

33:39 Not completely true . "IKEA is owned and operated by a complicated array of not-for-profit AND for-profit corporations." ... IKEA is very big over here in the USA.

[@kstringer24]

34:10 Where's Austraiya?

[@rubusroo68]

that scope is still upside down...

[@ElmerFuddGun]

Rubus Roo EEVblog IT IS CONTAGIOUS !! There are now 4 scopes upside down. For the love of god MOVE those analog scopes away from the digitals that have the virus!

[@necessaryevil8615]

Coolblue is a fairly popular online shop in the Netherlands. They sell all kinds of consumer electronics. And Dave: 0.5 mF != 1/2 F !

[@christopherhauck4702]

I can't believe nobody got the reference after all this time "the ducks guts" is a capacitor

[@jonas.gruska]

The audio is in sync for me, but its quality is pretty horrible. Even in higher resolutions.

[@optroncordian7863]

The flashing leds on the electronic business card really display a morse code. Could not decode everything, because of the cuts in the movie, but the green one for example says "Dave" in one moment and in another says "...ers", probably a part of a name too. Pretty original idea for a card, I am interested.

[@dawn1berlitz]

like you dave i like to take things apart and that one ,multimeter the way the fuse was held i have never seen anything like that before either it was very interesting to see it

[@BenjaminEsposti]

31:53. It might not be for cheap purposes, it might be for a lower profile :) 41:49 .... yay! Finally someone my age who can design a nice looking PCB! :D (Yes looks like the iron was really hot!)

[@JustinHallPlus]

Do Aussies get Casio calculators more often than Texas Instruments?

[@Satelitko]

That ABB power supply looks pretty sexy!

[@bsvenss2]

Luben Lambov of course, swedish quality! :)

[@crunchyfrog555]

As someone with primare audio equipment, I couldnt agree more. The swedes are awesome at quality electronics

[@Cold-1]

Infinite loop : Actually, only the "A" is (formerly) Swedish. ABB is regarded as Swiss company.

[@urdnal]

Oh wow! A Sharp X68000! Those were beasts when they first came out! Too bad they never came to N. America. Such a good looking case too. Perhaps the best I've seen shape-wise.

[@urdnal]

urdnal And btw, that stereoscopic port was for 3D glasses. They used LCD shutters, much like the ones for the contemporaneous Sega Master System/Mark III. I'm looking forward to the tear down.

[@iyatemu]

urdnal The Famicom (and Sharp Twin Famicom) also had its own compatible pair. Completely usable with either an FC or SMS/Mark III

[@urdnal]

***** Well, so it did. I didn't even know that existed, always been a Sega guy myself (mostly).

[@kg4boj]

"Nerds are afraid of the sun" ... yet it powers your house :-)