EEVblog

[@ClawSpike]

Dave this was the most stressful and exciting full teardown in all these years. I was screaming at the screen “don’t open the crystal heater. You are going to ruin it”. Then you said it would be silly to open it. I gave a sigh of relief. But then you opened it! I almost fell off my seat. Great video. I would rather watch your teardown videos more than any Tom Cruse movie.

[@morelenmir]

Thank you VERY much for posting these teardowns/repairs. They are fascinating and the older ones genuinely nostalgic for me. Most of all the way you demystify things is incredibly inspiring. Please keep them coming; your channel is fast turning into the favourite among my youtube subscriptions.

[@internet146]

You've inspired me to do a teardown of an 70's era philips scope. Awesome vids!

[@xquercus]

The precision OCXO teardown was great! Thanks for the show!

[@Bobherry]

the first teardown tuesday!

[@jippenfaddoul]

I love seeing the teardowns with you as a guide. Its helped me learn quite a lot about electronics.

[@ChrisR3tro]

Just wanted to let you know what I think: Teardown Tuesday, is the best idea ever!

[@g1fsh]

The reguler theme is a great idea Dave gives the thing a bit of structure. Great idea!!

[@kibi15]

Yes, let's have a regular Teardown Tuesday. Brilliant idea!

[@drblah]

The last part with that crystal was awesome. Thanks!

[@ExStaticBass]

Mate, I bloody love teardown Tuesday. It's one of the highlights of my week. In fact, it is the main reason I subscribed to your channel. That is to say that I think you got your "tongue angle" right when you had the idea... I do love that bit too frankly. It's silly bits like that that make the rest just that much more entertaining. So thanks lots mate, and keep em comin...

[@lennoxtrey3109]

I guess im asking the wrong place but does anyone know a trick to log back into an instagram account? I somehow forgot my account password. I love any assistance you can offer me

[@juliodevin6261]

@Lennox Trey instablaster ;)

[@lennoxtrey3109]

@Julio Devin Thanks for your reply. I found the site on google and Im trying it out now. I see it takes a while so I will get back to you later when my account password hopefully is recovered.

[@lennoxtrey3109]

@Julio Devin it worked and I now got access to my account again. I'm so happy! Thank you so much you saved my account :D

[@juliodevin6261]

@Lennox Trey you are welcome =)

[@compwiz101]

Great video! I'm on my way to look at some test gear for my lab tomorrow morning; a 3mhz sweep function generator, an Elenco F1000 Counter (w/ Oven controlled crystal!), and an old heathkit audible/visual signal tracer.

[@TheCrazyInventor]

Tuesday is now my favorite day of the week. Sounds like an awesome idea. :)

[@ytrewq6789]

Thumps up for teardown tuesday. Thanks dave for showing us whats inside even to the extremely sensitive parts and taking the time to explain everything properly. My favourite so far was the Tektronix MDO4000 Oscilliscope pure nerdgasm on that one :-)

[@thisoldguy]

I'd be up for Teardown Tuesday as well as Thursday!

[@SeanBZA]

Prerscaler IC's are TV tuner dividers. Used in the first gen digital tuned TV sets.

[@lambdacore1337]

Great teardown :-) Like the idea of teardown Tuesday. Keep it up! Greetings from Germany.

[@SeanBZA]

Ceramic board - big resistor on it to heat the crystal. Transistor far away to keep feedback low. On the ceramic will be the reference voltage source and comparator, kept at constant temp. Crystal is so big because it is aged stock, has been cut and manufactured, then stored for years to age out all the stress. Only then assembled into a unit and tuned finally. Small fibreglass PCB has the oscillator and tuning components, to keep them stable as well.

[@RandyLott]

I get butterflies when I see a new EEVblog video. YES!

[@dregmar0]

Great video, loved it. Especially the crystal teardown

[@EEVblog]

Either separate piles or tossed in the one bin, and just keep a mental note.

[@EEVblog]

Be sure to post it as a video response!

[@irishRocker1]

7:05 Wow! A microcontroller manufactured in Ireland! As an irish electronic engineer it's pretty cool to see that! although there are a lot of electronics companies here. maybe not so much manufacturing anymore but design is pretty big here which is a great thing!

[@scottyleics]

Teardown tuesday is an awesome idea!

[@realcomix1]

yes for Teardown Tuesday!!!

[@MewK_]

Yay for regularity!

[@TomStorey96]

Don't turn it on, take it apart......! (*Turns it on*)

[@EEVblog]

Awesome, thanks. Yeah, there it is, a "counter on a chip".

[@andresreichardt]

Nice Tear down Dave!

[@aptsys]

It's always good to be regular.

[@devjock]

I feel like a kid in a candy shop. Two blogs in one week! (giggle) Thanks Dave, awesome blog once again!

[@philpem]

Nice teardown as always, Dave! The OCXO teardown was especially interesting. Also, the PM6673 service manual is missing the schematics -- it's a two-part manual; both parts are on BAMA, along with the operations manual.

[@AntiProtonBoy]

I approve of this new segment...

[@Nate_dog01]

Nice......I like the tear down Tuesday idea....

[@TheBananaPlug]

Dave, the crinkly solder mask is 'cos the board had tin lead plate on the pcb tracks that is covered by the mask before stuffing and then sending to reflow. The mask crinkles as the plating reflows. This was a real problem for boards made in the 80's as you correctly say the mask can flake after the reflow process. Steve

[@thrjygdcmnbfdzfsa]

epic fail. you said your famous words "dont turn it on, take it apart!", then you turned it on.

[@Nermash]

Thumbs up for Teardown Tuesday!

[@douro20]

Fluke and Philips at one time entered into an alliance to build highly advanced test equipment, and this may very well be one of the products of this alliance. Fluke did eventually buy Philips' test and measurement equipment division.

[@darkobul1]

It would be great if you would/could do some more beginner stuff, but I guess your auditorium is more advanced. Thank you for all this work.

[@exscape]

It's in 1080p now. KZbin makes low-res versions available first (presumably, they are transcoded first!).

[@SeanBZA]

The custom chip is IIL as well, old design there.

[@srscricket]

some regularity would be awesome!

[@azyfloof]

Fantastic teardown :D What was with the transistor on stilts at 10:07?

[@adamlumpkins2000]

Keep up the good work!

[@MickOhrberg]

@EEVblog Do you have a system for organizing screws and such for teardowns, or do you just keep screws in separate piles?

[@Aeduo]

Pretty sure he's done both. Just dig around in his videos.

[@raguaviva]

Tuesday teardown! Wohoooooooo!! I love Tuesdays!!!!

[@azyfloof]

I've always wondered what caused that! Seen it in a lot of old bits of kit :)

[@PhattyMo]

The OQ0040 appears to be a dual 9-decade counter of some sort. Google for "OQ0040" and the 5th hit is the manual for this thing. :D

[@JacquesMarais]

Any idea when usage of SMT became popular ?

[@svxcom]

good work

[@TheSoundtec]

I'm looking for that magic chip Philips # 0Q0040 . Any ideas where I might find one? Love your videos. Thanks! Garry from Canada.

[@douro20]

I've had some TCXOs but never an OCXO.

[@uzimonkey]

I love teardown tuesday. The more exotic (and perhaps old) equipment the better. I hate taking apart new stuff and just seeing one giant chip and a whole lot of nothing.

[@stupidboy15995]

thanks

[@conoba]

The OQ0040 is a custom chip that contains all the counter logic.

[@MrRealgamer777]

Is everything in your workshops warranty voided?

[@MikePerigo]

Love the video but surprised nobody has asked the $64000000 questions. Did it work when you reassembled it or have you scrapped it? If it works how are you going to recalibrate it?

[@laharl2k]

i like the teardown tuesday idea, and also u could add a burn something thursday, thermite everywhere!!!!

[@lolypopboy777]

Please! make the next teardown about a synthesizer! :D

[@nightshadelenar]

OQ0040 is an Intigrated Schottky Logic Aray (ISL)

[@First2ner]

woohoo, I like Tuesday from now on

[@pausmth]

I think this teardown tuesday idea might be a winner... *strokes beard*

[@VolksTrieb]

I like teardown tuesday ;) Greets from WEST germany ^^

[@pxidr]

"Less is more" design. However not a lot of HF stuff inside that.

[@stupidboy15995]

What are those orange components?

[@bbman_01]

When was the last time something was taken apart before it was turned on, or is this some video devilry :P

[@TheEXTRAtesco]

Keep it up!

[@0dium.]

lets resurrect this zombie for the record ... :) The Philips custom OQ0040 chip : This LSI chip combines ECL, I2L and TTL in the same chip. It forms the heart of the Philips nine-digit frequency counter series PM667X. The chip contains two counting registers, synchronizers and logic-control circuitry needed for such measurement functions as frequency, reciprocal frequency, period average, frequency ratio average, count, time interval, time interval average, phase, duty cycle and multiple burst average. The high frequency (10 MHz) input data is accepted at ECL level which makes it possible to use ECL prescalers. The command inputs are TIL. Outputs are ECL (for fast triggering) and TIL. About 1000 highly packed I2L gates operating at 70 μA/gate are used for the logic functions operating below 1.5 MHz, and about 500 ISL gates (also operating at 70 μA/gate) are used for the 10 MHz functions (counting registers and control logic with maximal 4 gate delays per clock pulse). The frequency specification is 10 MHz; a maximal frequency of 18 MHz was measured. Power supply voltages are 5 V and 1.5 V. Power dissipation is about 100mA•1.5V + 25 mA '5V = 275 mW. The chip-size is 23.2 mm2.

[@sdttnkara]

The caps not made in Germany. They made in West Germany. 05:28

[@RandyLott]

"Wife will kill me" Saturday and Sunday haha!

[@whiskeyify]

I knew Dave was going to open that little box....just wondering what was inside was killing him. Anyway I would have opened it too.

[@DeKempster]

OF, ON, OQ Philips parts are custom parts.

[@Gameboygenius]

Not related to this video, but please go get a real analog synthesizer for Sagan. (Gotta start early.)

[@royce321]

teardown tuesday woot :)

[@gryzman]

the red smears on the can look like it was kissed and lipstick stuck

[@ComplexPole]

Or a few SMD components and a large blob of some kind of plastic over a chip -.-'

[@bcsupport]

tape them down to a piece of paper and label them

[@bborkzilla]

Chewsday on yew choob!

[@TheSoundtec]

Months later and OMG still never found that chip.OQ0040. mine is fried. IF anyone has one please MSG me or reply here.

[@TheSoundtec]

yes zero stock. Thanks.

[@simontiefenbacher]

Do you still need some? My father still has 5 pieces. [e-mail] New not old!

[@jonathanmulzer17]

Garry Niedzielski there is one on eBay right now for $80, if you are still looking.

[@noliljohn6806]

Developer Chip Maker.

[@MandolinMan0001]

Ah for feck's sake Dave! 1:07 Don't turn it on, take it apart! ^first of all, you seemed to get turned on... 1:11 You turn it on! CONTINUITY MAN! :P

[@vasko002]

Electrical fire Thursday

[@iomarau1]

it's wednesday sydney time lol

[@deweys]

"magic can!"

[@Aeduo]

How much crap do you have that you can take something apart every week? :p

[@theCpuBuilder]

Germany :D

[@thenerdyouknowabout]

Sniffff. Yea lol