Hi Dave, I have been watching your videos for a long time and you remind me a lot of my own father, he was not into the design stuff but he used to fix TVs, radios, video recorders (including Umat) and goodness knows what else, he started in his late 20's back when everything was huge and back breaking to lift. He passed away back in 1998 and thanks to your videos it keeps him a live in my mind and reminds me of all the hours I spent just watching him and picking things up from him, sadly I never got into it much myself but one day I would love to meet you and thank you in person for everything you do for all of us. Regards, Stephen (Melbourne Vic)

that core memory is just beautiful! thanks for the closeups of it!

Wow. Amazing memory board, fantastic retro technology! Thanks so much for showing it!

Another great mail bag, I love when the old gear comes in!!

Loving the mailbag as always Dave, esp the ferrite core memory board!

Some advice for Charlie, and his mum and dad. Amateur radio is a *great* way forward for younger people who don't have the option of school or college courses available to them. Not only are there many educational books, but you will almost certainly have a local amateur radio society near you, where they will be more than pleased to pass on help and advice, and I'm sure can help out with components. I got my ham radio "ticket" when I was 17, and should have gone for it earlier! Having a radio callsign on your work resumé (or C.V.) is often a better way "in" to a job interview than any number of exams and qualifications. People in electronics will see it and know that you have "walked the walk" for some considerable time, and it sets you apart from all those people with just theory. All the best mate!

@munnsie100

9 жыл бұрын

Thanks so much for the advice! I'm planning to save up for next Christmas to get some HAM equipment, set it up, and get a callsign! Luckily a man up the road has a back garage full of equipment and has offered for me to visit him whenever I get around to getting my own setup :)

@riko4628

9 жыл бұрын

Charlie M Charlie, you should think about creating your own VBLOG :)

@munnsie100

9 жыл бұрын

Great idea! I'll wait until all of my exams are over and get cracking! :)

Loving the new parcel opening tool for mailbags...

Christmas every Monday! Lucky you. Keep up the good work!

wow, that memory board was beautiful, definitely worth framing and hanging up somewhere :)

WOW that core memory is the most amazing I've ever seen!

I bought two of these core memory boards off of ebay, and I managed to get them to work and dump the existing data in them. I made a PIC based "core memory" exerciser to test every core. yes they all worked! It's 16K*18 bits (and is designed as a 16K*20 board but only 18 bits worth is stuffed). My board had defective tantalums and a TTL chip but I fixed these. All the chips on the core board are diode arrays, btw. I also drew a schematic out of that board.

@EEVblog

9 жыл бұрын

kevtris You reverse engineered the *entire* board? Do you have the data?

@sbalogh53

9 жыл бұрын

Wow! You are a true hobbyist hero. Well done! :)

@kevtris

9 жыл бұрын

I do but I doubt I can post the URL for what I found. I also made a schematic of it and the 32K version but I might've lost 'em. blog kevtris dot org forward slash blogfiles fwdslash corememory stuff should be in there. core4 txt is the pinout and usage.

@kevtris

9 жыл бұрын

EEVblog yes I posted the link to it on dexxter's reply. if you can't get the files send me a personal msg and I will hook you up.

LOVE the ferrite core memory! Would like to see that up close.

That core memory modular is very interesting! If I remember correctly the core itself was hand made due to it's complex nature. Enjoyed the video as always!

Shots pefect, great stuff!!!

Dave, how come you rarely use that fancy tegano scope of yours?

OMG that memory at the end was amazing D:

That Dundee knife freaks me out every time you pick it up. Sooner or later... Bandaid time!

Thank You for the memory tear down. Do you plan on some HD photos of the board? I think all of us would love to see some.

I seem to remember a tablet (acer?) that also had a 5.35V charger, apparently the higher voltage was used to signal 2A dedicated charger current. Lots of complaints that it would only charge very slowly from anything but the original charger

27:03 That board is an absolute work of art. I'd hang that on my wall for sure

That core memory really brings the macro lens to its knees. :O

Alexander M. Poniatoff (A-M-P plus EX for Excellence) must have been amazed going from making motors and generators to constructing memory boards for space shuttles, incredible to think that they used to do all kinds of computery things with that kind of technology, and even moreso that we're going back to that kind of memory storage with SSDs and the like... :D

First I love this series and thank you very much for your time doing them. But please more Mailbag in the Mailbag segment. I feel like I got a 15 minute sales pitch.

@tubical71

9 жыл бұрын

the same goes for me.

It's neither 16k bits nor 16k bytes. The letter said it's 16k words of 18 bits each. 16 of which are used for actual data, plus 1 parity bit, and 1 "protection bit"(?).

traditional fresnel? I own several IR thermometers and I have never seen one from the outside, but I have yet to take them apart... they all have some greenish or reddish tinted glass in front of the sensor. I would bet they are all real lenses. Maybe a sign of quality?

I have to look for a good deal on a FLIR. I have wanted one for a while now. :-)

Regarding the FLIR charger - i just got my new Samsung S5 today and the USB-charger was also rated 5.35 Volts (2.0A). Curiously, i checked some of my older chargers for Samsung phones, some of the newer ones are also rated like that.

That memory board WHOAH !

I'd have to say that that ferrite core grid looks to be largely assembled by hand. Given the very low production it would have probably been too costly to develop tooling for fabrication.

For kids and EE stuff, I have both of my kids involved in local hacker-spaces and coding academies. Been fantastic for them both socially and educationally. I would recommend it to any parents looking to get their kids interested.

Hi Dave, 4,35V is the max voltage needed to charge some of the new high energy density Lithium cells as the Samsung SDI ICR18650-32A or LG ICR18650D1 keep the good job Phil

They managed to get industrial temp range by using standard IR temp. sensor, not lepton. Flir One has 0-100°C temp measurement. But what's the use of temp. color scale on the left of the screen when it's not numbered? The thermal image is not calibrated, so it's just for information :(

Real mailbag starts at 18:45. I think the Flur product review should have been relegated to a separate segment.

Regarding core memory, it's neither bits nor bytes - it's 16k words from what he said. Each word being 18 bits, so 16k x 18 = 288,000 cores. 16Kbits would only be 16,000 cores of course. It's funny though since because of the density, it's unguessable as to how many there are just by looking haha. 16K? 100K? Sure, I'll believe it. ;) As far as I'm concerned it's just "a lot". ;) Fun segment all around Dave!

you should fill the bench all the way up with mail bags and boxes and talk from behind them. "hi! welcome to mailbag!"

What a precise, labor intensive nightmare that core memory would have been to manufacture. Wow!

Love the ferrite memory! Dave, has anybody ever sent you core rope memory?

Love the 16k ferrite memory module from 70s teardown. Watch from 25:50 . Beautiful piece of Technology.

I got exactly the same usb charger from a cheap chinese tablet that you got from the FLIR. The sticker also looks exactly the same! It only says "Switching power supply" instead of FLIR. The white sticker on the side has a serial number: KP0100P00130301002PKA5

Hi! Found a video about the production and testing of equipment for the Apollo mission. In one part you can see the manufacturing process of a ferrite core memory module! Enjoy! Computer for Apollo

Regarding the voltage output on the power supply, they're not the first to do that. The wonderful USB power supplies for my not-so-wonderful HP Touchpad tablets output 2A at 5.3V.

0:04 jeez you collected a lot of stuff again. Well I'll get my popcorn and enjoy this

Those ferrite cores were insane.

Thanks Dave. That early Nasa board has "frame me" written all over it.

have to take the wrapper off the yellow one as well as all flit products. i can't watch mines on my computer theres nothing on it all can see are the cord image

This would probably be a question better posted on the forums, but while I'm here.... what's the bare minimum spec TIC that's any good for "shorted/hot component on PCB no smaller than SOT23" use? Burnt myself like a stupid bastard today doing some fault finding and I'm thinking of making puppy dog eyes at my company to get one for my department.

Looking at the construction it was probably assembled with a machine, as machines for assembling core memory were developed in the late 1960s. I'd like to see some plated wire memory. It is a similar technology which was developed by Bell Labs back in the 1960s, and it allows both for cheaper construction and potentially higher densities since it can be made using the same photolithographic processes used in PCB manufacture. It was actually used, in a non-destructive-readout version, in the Honeywell HDC-701 missile guidance computer used in Minuteman III ballistic missiles.

Using the Crocodile Dundee knife on the Winnie the Pooh package... I clenched.

a bit of 'Dambusters' technology with the lasers!

I don't really see the big difference in a "real" thermal camera and this "visual thermometer". Both show a thermal view and both gives the temperature of the cursor area... I guess a thermal camera makes a more precise target.

At 20:30 - I am not a physician, yet after working for 7 years at a pharmaceutical company which was/is a leader in medicine for transplant patients, I could say that *liver transplant* has a relative high survival rate and significantly better in children, especially if organ is donated from a living parent (Even small part of a healthy liver can regenerate). Still, patient should receive some immunosuppressant medicine. The advances in immunosuppressant medicine has been significant. There are many patients on waiting lists in need of an organ in countries with "opt-in" legalization. Those Individuals who wish to donate their organs after death should read about legalization in their countries and fill the opt-in consent form at an Organ Donation Register.

@munnsie100

9 жыл бұрын

Hi Ali! Interesting read! I have been on anti-rejection drugs (Tacrolimus) since 2008 :)

Hi Dave! Suggestion: Get a ruler in the macro shots as well, or maybe your pointer.. Something for size/enlargement reference!

@Mandibela

9 жыл бұрын

Oh you did ;P

Man charlie got lucky getting a scope like that for free! I'm 14 and still trying to fix my tektronix 464 after a year of owning it. any advice on fixing these older scopes?

That dry sand is amazing. Keeps the kids (and adults) entertained for hours. Why ferrite core memory in 1993? Wouldn't there have been IC memory at that stage?

@EEVblog

9 жыл бұрын

Paul Howard Yeah, love the dry sand, I want to know how it's made.

@gglovato

9 жыл бұрын

he bought it in 1993, that thing was in storage for decades

@harveyperch

9 жыл бұрын

EEVblog mix sand and scotch guard and u get the same thing

@stephenwoods4118

9 жыл бұрын

Paul, core memory is non volatile. It's also not subject to alpha particle or cosmic ray errors.

Audio was a bit bad today, when you filmed the close-ups. But awesome show as always!!!

Great video, I love ferrite core memory more than I should. WHY DIDN'T YOU USE YOUR MICROSCOPE THOUGH. Ahem, sorry, that had to get out of me. Also, you might be aware of it already, but you can stack those macro adapter rings on top of each other to achieve much better macro capabilities (of course, you'll lose depth-of-field unless you decrease F-number)

But the big question can i modify it to fit into my DDR socket :P

That memory unit is fascinating.. I almost want to think it's hand made, but there's no way someone sat there threading all those...

18:55 OMG he put the knife right through Eeyore! Why Dave why!?

@EEVblog

9 жыл бұрын

Christopher Johnson He was asking for it!

@munnsie100

9 жыл бұрын

Poor old Eeyore meets Dave's STRAYA Knife :P

Yes sure, the E8 is better image quality but it cost much. for the price, the TG165 is very great and have a good (80x60) résolution if compare to similar fluke products :)

That's 64x64x32=131,072 ferrite cores, which amounts to 16KBytes.

love the pocket knife Dave :-)

they should've done the lasers in a triangle shape. :D

I think the FLIR TG165 should have had it's own "It's product review time!" video rather than being thrown into the mailbag. Could have been linked to separately then "Here's the review and the next vid is the tear down", which was awesome, you really did show no fear in ripping it apart. Shows Flir didn't were not being tight and asking for it to be posted back after the review.

Hey! I've got the bottom half of that Ampex core memory board! I hope you try to hack it.

That core memory was assembled by human hands under high magnification lenses. Imagine fine needles being threaded through the cores by steady hands.

Bloody hell, Dave! You just ripped that Eeyore with your sword!

You where beeing a little unfair with the FLIR TG165 in comparison with the ten times more expensive E8 when looking at electronics. I think the little TG165 was doing a nice job for that purpose.

Love the AMPEX!!

"Welcome to the mailbag, lets go from oldest to newest, apart from the commercial item I've been sent which I'll spend half the video on and then say I don't have the time to open all the rest". If you want to do commercial advertisements on your channel then fine, but keep them separate so we can skip them, or a short advert at the beginning and/or end. Before when you've been posted commercial stuff it's been a quick few minutes look then a separate video. Makes me thing Flir are paying you for the advert.

@EEVblog

9 жыл бұрын

Jeff You can think that all you want, I was excited to take a look at the camera, so I opened it first. Too bad if you didn't like that.

@mipmipmipmipmip

7 жыл бұрын

EEVblog I just came here for the IR camera :)

@USWaterRockets Reminds me of when Ben Heck kept mispronouncing the British ZX Spectrum or 'zed ecks Spectrum' as 'zee ecks Spectrum' lol!

@EEVblog

9 жыл бұрын

Z is "zee" in the US, that's how they pronounce it. It's not wrong, just their way. Just like they shouldn't say we are wrong when we say "Zed 80" processor.

@robertcalkjr.8325

9 жыл бұрын

EEVblog Every time I ask a Brit why they hate the letter Z so much, they get angry at me. I wonder if they call a Zoo, a Soo?

@robertcalkjr.8325

9 жыл бұрын

***** A Brit is British. Dave is an Aussie. It's British people from England that always get angry about it.

@myozone

9 жыл бұрын

Robert Calk Jr. Every time he says Hay-ch I correct him 'No it's H' We exported are criminals to oz in the past ...;-) !

@SproutyPottedPlant

9 жыл бұрын

Robert Calk Jr. depends which Internet troll you ask that day I guess!

Hi, what do you think of Dewalts thermal imager? 👍🇬🇧

I've seen some logitech device that came with really long (2+m) usb cable. Power supply had 5.15V output.

@EEVblog

9 жыл бұрын

SakariNy I've seen that. But this is the first time I've seen 5.3V

wowww thats pretty, gives you an idea why computers were so damn expensive back then

I have a VT04, its not as nice as the FLIRs, but it is better than the VT02. It does what I need it to do, and I couldn't justify the higher prices for the FLIR models at the time. It does do the visual blending, still, and the firmware update gives it some better battery life.

I'd have to work for more than 2 years to buy such Flir thermal camera.

I wonder how the laser points rotate?

Love core memory! It's so aesthetically pleasing! I have a Wang 360SE Electronics Package (sadly, no keyboard/nixie display unit... only the processing unit). It was a calculator from the mid to late 1960s era that used core memory. Sadly, it's the only core memory in my possession. My calculator's core memory doesn't hold a candle to THAT beaut! I am in LOVE with that core memory! Sexy!

i got the tg165 now and it is okay for inspection , okay it is half price the real one ,so i got the 165 and with my phone camera i can do it all. go for e8 or hack an e4 if you ar looking for alien in the woods they have greater resolution.

@mipmipmipmipmip

7 жыл бұрын

jacobhn2 it would be fun if there would be a cheap ir camera with zoom lens

nice mailbag thumbs up **** if u are interesting in a review of the flir tg165 vs the fluke vt04, then u should watch martin's great video: QTV #9 - FLIR TG165 vs Fluke VT04 Visual IR Thermometer / Imager

Awesome Vid!!!

New voice! Thanks Dave!

Intigrate a flir to create a heliostat?

Mailbag video and half of it is on comparing ir cameras...

Dave, isn't the Fluke manual focus?

So, I've got 16 Gigabytes of memory in the new computer that I'm building. But seeing that core memory STILL makes me jealous. Wonder if you could get that stuff to interface with a modern computer?

@reggiebacci

9 жыл бұрын

Everyone phone ASUS until they agree to put the socket on all future motherboards.

@TheChipmunk2008

9 жыл бұрын

reggiebacci it'd be non volatile too. But with the wire run lengths needed, the performance would be godawful by modern standards

Missed your swiss knife...

Dave is that fluke adjustable focus?

We hope that you carefully separate your garbage and properly recycle all electronic components.

Where was the Tagarno microscope today?

Did anyone else get really weird optical illusions when looking at the core memory?

why dont u do tutorials anymoreeeee?? :(

Hi Dave, sorry to say this, but why did you feature that flir thing well over half of the overall video length? This is the first time i used the bottom slider to go past that flir "segment" as it was simply boring....!! Mailbag should be mailbag and not some form of hidden advertising. So this time no thumbs from me, as the flir is a truly thumbs down....but every other beeing great!! It would be much better if you had split this into two videos one beeing mailbag and the other the flir thermo what ever, so i have a choice of what i gonna watch, as i would have skipped that flir video! All the rest had been a pleasure to watch, especially the Charile segment and the core memory....Thanx for that!!

Your postman must get a real workout delivering all those parcels.

So how those rings can store information? 35:50

@TheBananaPlug

9 жыл бұрын

en.wikipedia.org/wiki/Magnetic-core_memory

@Gamewwx

9 жыл бұрын

Steve Pocock Cool. Thanks

anyone know what MSX refers to

Why don't we have really, really small magnetic core memory now? Flash memory is the ultimate in OCD technology especially if it is built in it could die at any time or write too many times! It probably won't but that's OCD.

Mick Dundee is missing his knife ;-)

Enough wire length to go to the moon and back!

This would be handy for tracking xenomorphs.