EEVblog

[@bols123]

Kto od dekompozytora?

[@brzechu6094]

Ja xd

[@djzbigi]

MultiMisiek ja też

[@Gerbi92]

płakałem jak oglądałem i śmiał się z tego kabla xD że był krótki to dekompozytor go przedłużył xD

[@Gerbi92]

,,młagnełtłofion,, XDD

[@krzysztoftkacz]

Może lepiej żeby EEVblog nie wiedział, co za mod był na tym przewodzie ;)

[@Kocis99]

Unitra is a big part of Polish history

[@medvidekkrupicka1404]

In fact, the Polish multimeter had a fully silver-plated PCB. It seems like Dave never saw anything like it before.

[@djunia4u]

Don't blame the construction of that receiver as it's almost best you can get in early 80's in communist country where getting any parts (especially semiconductors) other than local made ones was almost mission impossible. Also any electronics was expensive as f!@# so it was probably repaired many times. BTW that speaker connector it is a 2 pin DIN, it's actually German standard used in 70's and 80's audio amplifiers across whole Europe.

[@SinsBird]

You put a crappy battery in that component tester and expect LCD to be bright...Also contrast can be adjusted.

[@grapsorz]

that IS the standard DIN speaker connector for just about everything from the 60's in to the 80's you can still by them. www.clasohlson.com/no/DIN-kontakt/22-1644

[@vk3ye]

Yep. Featured in many 1960s-70s projects you find at hamfests etc. Jaycar sell them. www.jaycar.com.au/2-pin-din-panel-socket/p/PS0340

[@Microwave_Dave]

Some IKEA 12V lamps use them as power connectors too.

[@Stefan_Payne]

@EEVblog Haven't seen those Speaker Connectors in decades. That's the old, european way to connect Speakers to the Amp. Pretty normal in Amps from the 70s, maybe even early 80s... Oh and 'Magnetofon' is probably the good old turntable/phonograph or however you want to call it.

[@Boffin55]

Also, that amp has a lot of tuning bands. LW + SW in addition to the normal ones we think of.

[@mozismobile]

yep, we had those on our 1970's home system in New Zealand

[@LutzSchafer]

Yep every good audio amp till the 80s had these speaker connectors in Europe.

[@r2daw158]

Magnetofon - tape (reel-to-reel or cassette) player/recorder, so I guess, it's line-out connector.

[@mozismobile]

The 4 or 5 pin DIN connector will possibly be stereo audio in and out.

[@alfagulf]

Dave, that M Tester is a component Tester that I think is very interesting device considering it's benefits to it's price ratio. Unfortunately the one you tested had a faulty display, but I am sure you will like it had it worked. I have couple of them and I use them often to test passive and active components. There are many video reviewers talking about them on KZbin, have a look at them and you'll know what I mean. Thanks for your great effort.

[@SinsBird]

It was not a faulty display, it was a crappy battery. If you look closely, it showed 7V which is pretty low for a 9V battery.

[@diagtula]

let him try using a 9 volt battery instead of 7

[@radarmusen]

I got a similar type with a better display. It is a very good tool to see if caps are bad. I have a atlas peak and that only tell me the capacity. For 10 dollars it's fine.

[@Flextro]

You can just hold the button until it is prompt to adjust contrast

[@pepper669]

You can set the contrast. Just press and hold the button to go into contrast mode. Then press the button repeatedly to adjust it. Simple.

[@yaosio]

It's 2017 and webpages for hardware devices still suck.

[@NebukadV]

About the "M-Tester": I had one of these and it's not that terrible. Once you put a good battery in (7,4V is still not good ;)), the LCD is fine in it works quite well. Who would use these? Someone, who is not willing to pay some hundert bucks just to get an ESR reading. I know this thing might not be accurate and not well designed but it WORKS - and to get an LCR/ESR-Meter for 6 bucks - I don't care about the rest.

[@arongooch]

Never laughed so much from one of Dave's videos with the Bolt IoT device hahaha. Crazy world we're in these days that's for sure!

[@bengrant4724]

Soo good, I had to pause the video to comment.. Soo funny!

[@3800S1]

I was dying at this part. Lol

[@Drew-Dastardly]

"Internet of Shit!" made me laugh. twitter.com/internetofshit - today I learned that Juicero scam is shutting down!

[@jam99]

You could tell Dave was not pleased when he had to say, 'internet of things', but he has to be polite when people send him free stuff. I utterly empathise and sympathise with Dave here! Internet of shit; love it.

[@aidanfransen3571]

Dave is too stuck up with all his $1k + test gear... The last thing you opened is actually a very handy tester for resistors, leds, transistors, capacitors, inductors etc.. it will tell you what type of transistor it is, and what leads are base, emitter and collector as well as many other things, and it surprisingly accurate. Anyway, for a hobbyist on a budget it is worth getting...

[@leisergeist]

Gonna have to agree on this one "Why do these exist" because not everybody has access to a lab full of multi-thousand-dollar test equipment? They work perfectly fine for hobbyists and students, assuming you don't get one with a crapped out screen

[@ilyakaryagin4754]

Agree with that. I also have exactly the same type of transistortester from an Ebay. Got it in a case, and modded it to power it up from 18650 Li-Ion element. Also, reflashed a firmware for it. Very handy gadget to sort out bad caps, trannies, or even find out 'WTF is that unmarked little two pin thing'. Dave is too bold with all his lab testing gear.

[@EEVblog]

By ""Why do these things exist" I was referring to generic unlabeled test boards like this. If the damn thing had a descriptive silkscreen label and such on it I wouldn't have said that.

[@sykskysyk]

Yeah Dave, this series of product happens to be one of the most discussed topics on the forum of all time, partly because there are way more versions, clones, and derivatives than you can wrap your head around! This particular one you got is probably bottom of the barrel compared to the current state of the art. www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

[@aidanfransen3571]

Generally when you buy a product there is a description of the product before you purchase it... its just because someone randomly decided to send this to you without an explanation or note...

[@M0UAW_IO83]

Nah, got to disagree here, those little LCD transistor/LCR testers are awesome gadgets and impressively accurate for the price, as others have commented you really need to put a fresh battery on it and give it a chance. Not as good as a full on curve tracer but *really* handy little quick test gadget. Heavily documented on the EEVBlog forum too under $20 ESR tester I think?

[@migsvensurfing6310]

"Replace the battery" May mean replace the battery.

[@andruloni]

*peplace

[@SilverGreen93]

That last Transistor tester / LCR meter is great. I have one. DAVE, your battery is FLAT, that's the reason it doesn't show properly on the LCD. It is very useful to quickly identify components and see the basic characteristics...

[@fuentescgabriel]

You SHOULD do a review for the MTester. Use a NEW 9V battery and it will be fine. There are a lot of people like me, wich haven´t an a LCR meter and the money to buy one, and this type of testers are so perfect for many applications. Many of us would like to see a complete review of this device and comparisons with commercial products.

[@fuentescgabriel]

They also has an ESR meter on it to chech faulty caps...

[@vgamesx1]

Checking caps is probably the best thing about these little testers, (IMO) not a lot of cheap gear can test capacitance much less give you fairly accurate readings, I have an inexpensive DMM that can do it but it's not that great at it and the range is much wider on the tester.

[@johnsnow5305]

Oh man that internet of things part was funny. I think Dave would've got it working if he didn't get the page not found error though. He stuck through most of the process, as annoying and unnecessary as some steps were (like selecting an icon, having to go to github for code that you could've just listed on the page and so on). I think that's the reason he dismissed the MTester so quickly - he was annoyed from the hassle of the IoT item. I'm glad he took the time to look at the comments and make a new video for it - definitely worth checking that out, especially if you have no way of measuring ESR right now. The cheapest ESR meter on E-Bay was like $22, and of course lacks the other functionality of the MTester. It might not be as accurate and precise, but still a good deal, and if you need that accuracy and precision, you could use a scope.

[@EEVblog]

+John Snow yeah, I was frustrated and in a hurry from the iot failure.

[@vk3ye]

That is no ordinary c1980s tuner. As well as AM and FM it features longwave (Europeans used it for broadcasting - we use it for airport beacons) and a couple of shortwave bands (covers most of what you need but it appears not to go down to 5045 kHz which Ozy Radio just out of Sydney uses).

Nice to read, Peter, that you are familiar with polish vintage home radio equipment. Receiver covered 40, 30, 17 and 15m bands (AM).

[@tymitunie]

"not design for proper volume production" - lol maybe no but still it was in every house back in those days and i tell you they made thousand's of them

[@kubastachu9860]

well at least the people had a lot to do to get paid for, maybe communism is actually about it :)

[@GraMyTiVi]

His channel is De-Kompozytor from Poland like something

[@AntonyTCurtis]

Honestly, how often does Dave opens a mailbag item *before* the date written on the envelope...

[@tohopes]

If he did then people would come to expect it..

[@EEVblog]

The worst thing you can do is raise people's expectations.

[@SarahWattCA]

Dave isn't a PR agency. He gets around to opening stuff whenever he feels like it. Anyone sending him stuff with the expectation that he'll open it in time to give them free PR is being presumptuous and disrespectful. That wasn't exactly the case this time but I'm not sure why there was any sort of urgency implied in this case when he doesn't even live anywhere where that eclipse was visible.

[@johncoops6897]

I'd say that the easiest way to NOT to get your item opened before a specific date is to write it on the envelope.

[@thanthanasiszamp4707]

Sarah Watt I've shared a private pist with Dave abiut my fitst electromechabucal inverter showing videos and schematics. Will he be late in reading it?

[@turboslag]

DIN loudspeaker connectors, very common in the UK and Europe from the 70's through to the 90's. I always have a few suitable plugs for those in stock, as I often have to connect such stuff up. The original plugs had a Bakelite or similar high temperature plastic moulding for the pins, so it didn't melt when soldering. The type available now are normal plastic, so you have to be very quick soldering them, or the pins melt the plastic and alignment goes to hell!

[@robbyxp1]

Yep, i can remember a 70's stereo of my sister using those

[@Graham_Langley]

The LMP plastic has been a problem for some time, not just on these connectors but also other DIN 41524 connectors including mini-DIN. Trick is to put them in a socket when soldering to them.

[@papal1ef]

If you don't recognize the loudspeaker connector. en.wikipedia.org/wiki/DIN_connector#Loudspeaker_connector

[@sanderkoster9680]

@EEVblog Those terminals are DIN-2 or Philips connector style speaker terminals.

[@RomanLutHax]

You have to read full doc for transistortester (the last one in video) ! www.mikrocontroller.net/attachment/143813/TTester_096k.pdf This thing is very, very useful for recognizing unknown parts, especially surface mount ones with cryptic markings.

[@harbselectronicslab3551]

Wow, just imagine how embarrassing it is to send something in and get this response hahah bet they never do it again must be demoralizing to have something shit-bagged like that ......

[@andljoy]

Then you should not send in an utter shit product

[@harbselectronicslab3551]

Yeah shouldn't send in anything at all, to be safe.....to any KZbinr

[@harbselectronicslab3551]

I just think its poor form for someone with a following to be disrespectful......he would be better off not having a mail segment, it just makes him look like a complete Galah........he is liked because he has a Steve Irwin character about him....maybe even a bit of Crocodile Dundee.......I doubt to many follow EEvlog for its technical prowess......its light hearted and fun, and these blowups don't do it any favours really.

[@Drew-Dastardly]

The component tester is a great item, with many variants on the basic thing, with a huge following and brilliant open source firmware development. Probably one of the longest threads in EEVBlogs forums: www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/3950/ edit: Dave, you should have a word with your forum Super Contributor, madires. Then go and make a whole episode all about the famous "transistor tester".

[@ed-jf3xh]

You really have lead a sheltered life. The ohm metre and tuner are priceless examples of how things used to be. The speaker connections were common in the 60's and 70's. Hang in there Dave.

[@nycsaba]

UNITRA Audio Amps were the "best" you could get in Eastern Europe in the early 80's / 90's. Basically almost all the clubs in that era were running their PA with this amps and speakers (A popular mod was to replace the original power transistors with Motorola one's) About the speaker connectors, I don't know how it's named, but it was a popular speaker connector type here in the EU

[@TheMrAtakama]

This is a "WG-2" Type "DIN" Speaker connector.

[@Zadster]

If this video had gone on for another one or two items, I get the impression that Dave would have imploded in a fit of outrage, indignation and disgust. I guess he hasn't read the extensive thread in his own forum about how good these little component testers are then...

[@saberpeep]

I have one of those little MTester units, it's quite handy for testing capacitors, not sure whats wrong with the screen on yours though

[@KrisCochrane]

Julian Dymer he didnt adjust the contrast.

[@SinsBird]

9V battery was low. It was 7V on screen.

[@m3peran]

You connected the Controllino connection board wrong. You moved the top board a little bit on side when you were connecting it so you missed the half of connections ;) Try to reasemble it again.

[@gordslater]

+EEVblog - ping Controllino fix ^ well spotted

[@EEVblog]

+m3peran damn, really?

[@m3peran]

Yes, you can see it also on the video here: kzbin.info/www/bejne/jaq5YWmEm7ytpbM (this black connector line is not connected to the device)

[@fou_barre]

44:09 "peplace the battery".. bwahaha

[@ChipGuy]

21:44 I got some of those SynQor DC/DC Converters on the right, but encapsulated for medical stuff (120W). They cost about AUD $300 each!

[@EEVblog]

+Chip Guy Vids doesn't suprise me!

[@brzechu6094]

Kto z Polski? :DD

[@djzbigi]

Brzechu np ja :)

[@lionelhutz4046]

The year is 2017. Microcontrollers run web servers serving Javascript over WiFi and require apps, location and API keys to program.

[@andruloni]

Seems like a start of a horror story, doesn't it?

[@MrScram-ih5eg]

"Backside for all you backside fanboys." Dave, 2017

[@johncoops6897]

Definitely wasted everyone's time on that stupid IOT thing. The five minute challenge should have finished at exactly one second later.

[@bloodyl_uk]

Wow, those two prong speaker sockets bring back memories, had a few european designed HiFi units through the years that came with those sockets.

[@agh7]

well the last device actually told you what was wrong. 7 volts for a 9 v is a bit low dont you think? use by many display not working because of the bad battery. didnt understand the rant here at all.

[@pepper669]

Dave, you're dead wrong - these cheap little LCR / transistor / whatnot testers are very handy tools. It's a case of RT(nonexisting)FM. You can adjust the contrast on these things by just pressing and holding the only button. Then push it repeatedly until the contrast seems right.

[@douro20]

All the big chips on that compute module are commodity chips; the MV64460 is a support chip for the two PowerPC processors (which happen to be radiation hardened!). The big Tundra chip at 17:17, a Tsi107C-100JE, is a PowerPC bus interface chip. The large chips marked ATLANTA are part of a chipset designed by Lucent/Agere and manufactured by LSI which provides an ATM switch fabric; these chips in particular are packet buffers. The memory module on the voice processor board is most likely for the Atmel radiation-hardened PowerPC chip just below it.

[@GeorgeGraves]

That was some really bad acting with the component tester.

[@Jayshnay]

that voip server belongs in a museum. Pretty crazy

[@TheDefpom]

Those speaker connectors were common years ago in the UK, I have had a few bits of equipment that had those whilst I lived there.

[@mvl71]

Same here in the Netherlands. My parents had a Schneider all-in-one system with speaker connectors like that.

[@SzaryJelen]

10:28 these connectors are "DIN" , "DIN-2" or "2 pin DIN" speaker connectors - popular in 80's in eastern Europe - still available at ebay :)

[@Orbis92]

I find these little "LCR"-Meters pretty handy and mine got a working LCD too. I use them for low/high ESR check when repairing stuff....

[@HylianOverlord]

The reason it asked you to turn off your mobile data was that Android 7.0 and 7.1.1 will not connect to a allow traffic through a wifi connection, when mobile data is present, that has no access to the internet.

[@neilbaker3395]

Yes the last thing component tester is brilliant ive soldered leads to the 1 2 and 3 solder pads with croc clips on the end makes it much easier to test things quickly mine was supplied in a case (not brilliant) but keeps it safer excellent on ESR electrolytic capacitors testing very accurate for the cost Dave check it out againg to test resistor -chokes- and capacitor values against a top of the range test gear also you may need to remove protective cover (plastice ) film off the LCD display regards Neil

[@timmgiles]

I had a quad-ra-phonic amp back in the mid 80's with those connectors. Remember when the BBC did some quadraphonic TV and radio broadcasts and I needed to lug the thing with its 4 speakers downstairs to plug it in to the telly. Great to have mailbag back and good that you are firing on all cylinders again Dave.

[@mrtnsnp]

The speaker connectors on that receiver were also used on the gramophone my parents had, probably mid to late 1960's vintage in The Netherlands.

[@dj_paultuk7052]

RE: Speaker connectors on the Polish amplifier. They were a very standard Speaker connector in the EU during the 80's. Almost every Amp / Stereo had them.

[@iwasz]

At last something from PL :)

[@squelchedotter]

"I get a lot of messages from india" I have no idea what it is, but being at least slightly well know on the internet seems to draw a huge amount of private messages from people from India, many requesting "mentorship" etc. In my experience they usually refuse to accept anything along the lines of "no, go away". Perhaps "mentorship" and social hierachy play a different role in their culture? I'd love to hear an explanation from someone familiar with the situation.

[@Tangobaldy]

I used to make those ferrite cores at 16 minutes. Way back in late 80s as a youngster I refused to wear ear protection when honing the center parts. Bit of hearing loss on left ear now. I used to pair the items in a Wan Ker machine. We had many a laugh about the name of company. We worked at neosid in Letchworth garden city Hertfordshire England.

[@maciej-36]

I want a video series of Dave trying to figure out howto use git. :D

[@matucha123]

Android needs location permission (it is coarse location not gps) to start Bluetooth device discovery. Probably google decided that you could localize phone with BT devices :)

[@Leonelf0]

matucha123 because you can (it makes GPS more accurate by pinging other Bluetooth devices) Tho I agree it should be seperate...

[@matucha123]

Developer should have included explanation message to be more clear for what it is used. In essence it could be used to determine location so permission shouldn't change it's name, but developer should always include description why that permission is used (if it is not obvious as in this example)

[@fuuturist]

for LCR meter you just need to adjust the contrast by pressing "test" button multiple times!

[@pepper669]

Press and hold - then press multiple times.

[@stefanbehrendsen330]

You should have shown how to correct the soldering failure of those QFN packages. You can easily re-solder them by using a hot air rework station and small tweezers to remove the package. You can then wick all of the pads, re-tin them, clean the chip leads if necessary, place the chip in the proper orientation, and used the hot air rework to attach the chip. Covering the entire operation in a paste flux will prevent bad joints, and you'll find that the solder joints surface tension will pull the chip perfectly straight once the solder melts. This is really common to do in board repairs / reworks.

[@marcus_w0]

I really love the MTester. It's litteraly one of the handiest things on my bench. It's a rip-off from the original "transistortester" published on the mikrocontroller.net community and it works like a charm. I got the exact same unit and my LCD ist crisp, bright and clear., maybe a bad soldering job or a bad resistor at your unit. I don't think you did it justice. Why on earth didn't you just put a freaking transistor in it and see what's happening? you'll gonna love this thing - I promise.

[@efilnikufecin2004]

22:45 the rack that those boards mounted into has 2 back-planes back to back, and the one that faces rear takes the smaller boards. The front takes the larger boards. I am not extremely educated on those systems, all I have done with them is dismantle them for recycling.

[@efilnikufecin2004]

ah you figured that out.

[@aaronbrandenburg2441]

Hey Dave Jones. the connector you are referring to is 2 pin DIN connector. specifically originally used for speakers. Yes the same din tipe standards as the connector round ones. except a different variety. And they are still used in other for uther now. Such as Christmas LED lights. Some halogen lights and others. Also have you ever seen the duh 5 or 3 pin DIN connector used on European audio equipment. It was used instead of rca connectors in Europe a lot of times. It would carry for audio signals equivalent to 4 RCA connectors For 5 pin variety of connector. Left Right In. Left Right Out. That same Din 5 Pin cable would be used for all cables. Also pin usage would depend on what's being connected to what. Such as the receiver to the tape deck. 5 Pin was used for stereo. 3 pin was used for mono. The cables that is. Also with the circular din connections. those connectors would accept other connectors with lesser amounts of pins. There was some are compatibility but in some cases with Wilkes limited compatibility. I am putting a Wikipedia link below. It describes that speaker connector as well. en.wikipedia.org/wiki/DIN_connector?wprov=sfla1

[@JerrySmithKociak]

UNITRA was the Polish brand that made hi-fi tuners, amplituners, amplifiers and cassette decks. My dad used to have UNITRA hi-fi system split in four parts: deck, amplituner, equalizer (yes, 5-band stereo equalizer, left and right channel set independently), and... a digital clock. There was an option to set on and off time for the amplituner. About those speaker connectors: those are DIN speaker connectors, a German standard actually. Greetings from Poland :) Fun fact: IKEA use those plugs in their modern LED lamps.

[@IACooper]

Dave must be very highly charged to trigger those Controllino inputs! EN 61131-2:2007 ("Programmable Controller" standard) shows that for a state '1' digital input the pin should be driven greater than 15V and be sinking at least 2mA (type I, or 11V & 6mA for type II, 11V & 2mA for type III).... Given the noisy environment industrial products are expect to operate under, fast transient burst immunity conformance is an important step in avoiding intermittent and 'unexplained' problems.

[@awesomeferret]

You are WAY too entertaining when you are angry. That last bit about that IoT device had me rolling on the floor.

[@CassetteMaster]

Magnetofon means tape recorder.

[@shanesrandoms]

Those speaker connections are a 2pin DIN variety. Used heavily in europe through the 70s and 80s.

[@TwoDogsFighting]

the connectors on the back of the amp are DIN 41529 loudspeaker connectors.

[@techalyzer]

When I saw the stereo amplifier I went like "Oh my god, are you fucking kidding me?". The exact thing my dad had when I was a kid, together with a pickup and a pair of Unitra speakers. It was called the Delia Stereo Amplituner. it was awesome, went down all the way to 1 Hz, you could see the speakers move back and forth. I still have the components recovered from it. :)

[@infango]

UNITRA vintage :)

[@gamerpaddy]

a misconfigured but else well working component tester that doesnt cost 1000 bucks is absolutely horrid.i better wash my hands afterwards, what a piece of garbage. *sips chateu lafite in a golden cup*

[@bbreeuwer4577]

These DIN speaker connectors were VERY common back in the day. So yes, have seen a ton. Prone to brake or noise a lot (first thing you change with a repair)

[@nt654321]

11:00 That's a DIN speaker connector, very common in European audio equipment from the 1970s and 80s - Bang & Olufsen even used them into the 1990s. And that kind of transformer isn't uncommon in European equipment either - I have a Philips 22AH305 amplifier from 1980 which uses a very similar looking one, with what looks to be completely uninsulated windings!

[@maltesartor711]

In defense of the app needing your location: Bluetooth LE, what this thing uses, needs the Location Permission to work. Blame Android...

[@davidtaylor6124]

Why do you need a phone to do anything with a microcontroller board?

[@SootySweep22]

Being an instrumentation technician, and loving all things controls, I would love to support the Controllino, but at €115 for the mini, with no LAN or rs485, and having to start from absolute zero with code I will have to give it a miss. It's a great product for makers and seriously custom jobs, but it will never make it in the industrial arena with prices and limitations like that. Give it some time, and hopefully it can generate a community around it. I'll keep a watchful eye on it. I hope it gets more support.

[@M0UAW_IO83]

Umm, the WizNet chip is LAN isn't it? RS-485 just needs some driver chips but I agree, it's an oversight that kinda limits it in an industrial scenario

[@SootySweep22]

Clint Jay Sorry, should have made it clearer. I meant the mini version doesn't have LAN.

[@ChristianRX7]

The loudspeaker connectors were standard and very common in Europe, the are called DIN 41529 connectors.

[@qwaqwa1960]

If the telecom boards are from a similar system I once designed cards for, the BIG boards are in the FRONT of the chassis, the SMALLER boards, in the BACK. Probably plugging into a backplane with common pins between front & back cards. I/O typically in the back, though mine had front I/O too.

[@peterdkay]

The M-Tester is a very good tester for R-C-Transistor (any type). Please use a new 9V battery and give it a proper test. I expect to see a proper review and an apology.

[@aslerunarborgersen5175]

Those speaker connectors was very common here in Europe in the 70s. Even my Tandberg Huldra 10 and two other Tandberg Sølvsuper radios has those connectors. I think its called DIN-connector. www.clasohlson.com/no/DIN-kontakt/22-1644

[@Fake_Blood]

I think the lesson here is don't send in random stuff without a note, or any markings on the pcb and expect Dave to figure it all out on his own.

[@shmehfleh3115]

Pioneer receivers of the late 60s & early 70s used removable speaker connectors, with screw terminals for the speaker wire on one end, and flat, keyed prongs which inserted into the receiver on the other side. I'm betting that weird Polish amp had something similar, and they've since been lost.

[@boltiot]

Hey Dave, Thank you for taking the challenge and more importantly for a genuine feedback. It is hard to find such frank feedback in today's times. We have taken note of the points such as Bolt not getting connected to the WiFi and of course the spelling error. Daamn ! That slipped out of our notice. However, APIs are disabled by default as a security feature. The function on Android used to list the WiFi networks requires the location permissions for the app for Marshmallow and above. Also, the device shows as offline since it is not connected to your WiFi Network. The same is also shown by the Blue LED which is blinking. When it gets connected to the WiFi the Blue LED is stable and the Green LED comes on when it gets internet access. You will be able to control any device(like the LED you tried) only if the Bolt is connected to the internet and comes online. However, the fact that Bolt did not get connected to the WiFi in the first attempt could be an issue at our end which we are trying to check why it occurred. We are working hard on improving our platform and hoping to get back to you with an updated version soon. The platform is currently available on Kickstarter. Here is the link - www.kickstarter.com/projects/boltiot/the-worlds-first-9-iot-platform Once again thanks for the honest feedback! Pranav Pai Vernekar Co-Founder and CEO at Bolt IoT

[@bassblaster505]

Ive seen those speaker connectors on Pioneer and Realistic gear from the early 70's. Pioneer SX-424 for example. i forget the exact name but Mouser has a pin header that fits that socket perfectly. even had the one pin wider than the other

[@leisergeist]

That VOIP equipment is beautiful KZbin's gonna demonetize you for pornographic content, careful! And those testers exist because not everyone has access to multi-thousand-dollar test equipment... D'oh!

[@EEVblog]

+LeiserGeist I'll finally feel like part of the club!

[@leisergeist]

EEVblog You're not a true KZbinr unless you've lost 75% of your adrev for no apparent reason!

[@richfiles]

It ain't _true_ tech porn till you de-lid those giant Agere semis!

[@ramonster163]

Yea, those speaker connectors were quite common (at least here in the netherlands) in the 70s. I think they were mainly used by Philips.

[@JosephMassimino]

The component tester has the numbers 1,2,3 on the zif socket, and you only had to put one lead on each, or one lead on two for a diode of resistor. Then push the blue button and it should test it and give a reading of what you are testing.

[@n00b247]

mtester is a simple resister/cap./diode etc tester just connect something to it and press the button really helpful if you need to get quick info on some old parts

[@x_x_w_]

E1/t1/j1 is basically a 24 channel circuit. Old school tech.

[@Barrybados]

The speaker connectors were fitted to car stereos in the uk around the 80-90s .

[@billallen2419]

The speaker connections were commonly used here in the UK up to the 80's

[@billallen2419]

They are known as 2 pin din connectors

[@Seegalgalguntijak]

We've had these old speaker connectors as well over here in Germany, so I guess it was a European standard or so. The plugs had one flat and one round contact, so you couldn't unintentionally mess up the polarity of the speaker. But they were very old, like from the 70s or so, at least in the 80s they were exchanged for the standard wire clips.

[@TheManLab7]

With that amp/tuner, those speaker outputs were used in England.

[@evahle]

Hi Dave. Love your videos! I bought one of those LCR meters 2 years ago. I absolutely love having that on my workbench. It's the first thing I grab when I want to do a quick test of my parts. I just can't believe they managed to pack that many instruments in one meter! I paid $20 for it back then on Ebay. I'm sure there are fakes out there by now, but I think you could do a whole video on this meter by itself. Thanks again.

[@jfwfreo]

Those telecom boards must be capable of handling a serious number of voice calls at once.

[@ftrueck]

Those Speaker connectors were pretty common in europe in these years. We had them on quite a lot audio equippment.

[@cogwheel42]

A griddle is solid (like the bottom of a pan). A grill has openings (bars, mesh, etc)

[@uwezimmermann5427]

It's a DIN speaker connector - nowadays regularly used for LED lighting cables: en.wikipedia.org/wiki/DIN_connector#Loudspeaker_connector

[@PlasmaHH]

The speaker plugs are called "DIN speaker plugs/sockets" here. And magnetofon is a reel tape player. The transformers/chokes with the intresting way to smd solder are rather common in telcom equipment, it must be a space/form factor thing.

[@reiserdog]

That last tester does not have any labels because it does not need them. Just plug in something. I have a different model with much better display, it is the most used instrument on my desk. And I do have more expensive/accurate/etc. equipment, but why bother just for a quick test/identification of some random not-so-important component when this does the job well enough under five seconds..

[@SantaFebuff]

Very nice video Dave, I loved how you went through 27 minutes of your life showing how that IoT device was just useless. =)

[@tenmillionvolts]

Speaker connectors were 2 pin DIN. Very common on many amps back in the day