bradsprojects (aka 00retrobrad00) here. Thanks for checking out some of my projects Dave! Unfortunately my web server is having a few connection issues at the moment so if anyone is trying to access my site - it will most probably be down periodically. I'm working on getting it fixed up however.

From someone designing a telecom FPGA while listening to this thanks for the recognition :) Whenever anyone asks what I do I have a hard time explaining. I eventually just broke it down to I design computer chips that make the internet go fast.

RE that book - The tuning fork, you used it to set the motor speed in the teletype machine, they had to run at a presice speed in order to properly translate the key press to electronic pulses that punched the tape, or read the tape from the deck to transmit the message at the proper speed, so the machine, which was properly "tuned" could read your messages. You struck the fork against the palm of your hand then held it in front of the running motor. There were 3 spots on the face of the motor and a stud that could be pressed in, or pulled out to adjust the speed of the motor. When the 3 spots seemed to stand still when viewed through the fork hands then the motor was at the proper speed and everything would work right. I used these thing both in mobile (huts on the back of a 3/4 ton truck) or stationary in a fiberglass hut on base during my tour in Vietnam, so it was a daily chore to test the machines we used to insure everything worked properly, then send a series of ry's to insure that the machine could do it's job.

Livestream build of that emulated HP calc? That's be awesome

Mouldymeter?

We want to see the calculator build!

I know that you're a very busy guy, but I sure love these mailbag segments. Thanks!!

28kV and odd mV ranges, plus the marking on the scale says this meter was dedicated to old school CRT TV repair. But I guess you need the manual to know how the ranges, switches and inputs combine.

Maybe send the multimeter to Mr. Carlson. He might find it a challenging restoration project.

How many crowdfunding projects might have done better if Dave only took a look at them before the funding time ended. Haha not pitting blame. Just poking fun.

Hope the pages aren't stuck together! I lost it.

Always makes me sad when a crowdfunder doesn't get featured before their cutoff, but that is the way it goes. It eases things when they reach their goal even without the "big boy's" help, though.

The 2 larger chips @ 40:34 are I assume 100k ECL, I have not seen much of that for a while we used it in the Philips mega doc monitor in the video path.

Dave, glad you liked my Microelectronics Timelines. Thanks for sharing. Cheers mate.

Oh forgot to mention, I have a very old multi meter, it is mounted in a very nice wooden box, a red face of some sort of early man made board, there are a series of plugs down both sides of the face, and a round meter near the top of the case. No brand names on it, and when I got it about 35 years ago, it had 2 D cell batteries made by Winchester according to the labels. I sold the batteries for 30 bucks each at a gun show, they went before the show even opened to a Winchester collector who was displaying at the show. I have never tried the meter as I didn't have probes to fit the plugs, (or any D cells for that mater) but it sits on my book case for all to see when they visit my home

That poster is too cool, just bought one. Thanks for sharing it with us Dave.

that newspaper was in dutch headline reads "friend go cycling against cancer" or near enough

I'd just like to thank you for having a 'no bullshit' style mailbag video with a stupid long intro and whatnot. Really appreciate that you just jump right in.

Similar story as Tom, not much money for equipment so I hunt for broken deals on ebay, fix them and equip myself. Owon scope - FW bricked it, update fixed it. Agilent PSU - unable to set/measure output, bunch of resistors were open/off Precision K type thermometer - nothing to fix, was actually working But it's not easy here in UK to get some broken equpiment...

The interesting thing about the telecoms cards is they are from a 565 PDH system and at 565Mbps was not a approved speed by the ITU-T so every manufacturer did it a bit different can be a nightmare to work on I have had many late nights fault finding on these systems

Boom is a town in Belgium, it's actually where Tomorrowland is organized each year. Boom is the dutch word for "tree". The o's are pronounced the same as an elongated o in "over there".

second battery in the multimeter was 22.5 volts

I love my 128x64 OLED USB tester.

Awesome! I have a stack of old Japanese market only calculators and organisers i've been collecting from the 70s / 80s.. will get them in the mail to you soon.

Excited to see the alcatels. We have those at work but so old we dare not touch. Just in case.

Bottom right section looks like an RF amplifier/filter/modulator. You can see the microstrip!!

I love this mailbag. Dave's like a kid at Exmas.

I do volunteer work at an e-waste recycling facility and I have disassembled some Cisco rackmount type gear (e.g. managed Ethernet switch with a boat load of Ethernet ports) and its full of custom parts and ASICs and things as well.

That crusty multimeter looks surprisingly clean inside. Just get rid of the rust flakes and it looks almost brand new.

top mailbag!..thanks Dave..love them one liners!

The numbers on the Multimeters RF range could be the frequency range on what you are measuring in MHz.

Excellent mailbag as usual. :-)

Gotta love plotter machines, I have a 60" one at work, and I've had some fun with it :)

19:47 - It looks like the batteries disintegrated and 'fell' down toward the range knob. I'm guessing it was left in someone's boat all year round!

How could you miss the datecode on the Alcatel board when it was right beside your hand Dave? Take a look here - 42:29 - and you will see, on the left, a sticker saying 491184. That screams to me that it was made in November 1984 and, I suspect, it is the 49th unit made that month.

looks like A0. keep in mind that scale is exponential. A0 is 16 times larger than A4.

yeah like the system 12 telecom installed to replace step by step equipment which was basically a single board with 4 386 processors on it to give you all of the added features like call waiting call forwarding and eventually message bank and caller id

Neat! I've had a retro-ball kit sitting here since xmas. Really should put that together. I also have a digirule on my desk at work :P

32:50 "I could do like a 30 minute or a half hour video..."

Thanks Dave!

I worked in a chemical plant and they threw their lab tools away. They all looked like that multi meter from the production of industrial pulp chlorine.

Looks like that crusty multimeter isn't using standard AA-batteries but standard (at the time) 22.5V batteries :)

Dave, you crack me up with some of your Aussie sayings. No Waccas. My new word of the day.

Aren't the leads a bit long on that crystal at 14:00, or does it not matter? They seem to go an awfully long way just to come back again.

I used to be a mechanic in a backstreet garage. I also had a serious awful car buying habit Ive never seen anything that rusty, seriously impressed. Frame it and call it art :P

Dave! Will you do a teardown of the Fluke T6 meter? Would love to hear your thoughts on it. AvE showed the back grounding pad becomes energized when the meter is used to check voltage.

Are you sure nS stands for nano seconds? Could it be nano Siemens?

Aishi is actually one of the better capacitor brands.

35:10 capacitative touch? Does it maybe need anti-static plastics instead?

Do you have to pay extra for garbage and recycling ?

Tony Nixon!!!!.... from the old piclist at MIT!!!! hi man! hahahha.. Dennis Crawley from argentina!... thank you very much for all your inputs 20 years ago!... remember Scott Dattalo?.. were that beast is now? happy to see your name here!.

Can anyone explain why the ground plane is hatched at 42:30 on the PCB?

I've been watching EEVBlog for years but I didn't realize I wasn't subscribed till now! Oddly I am subbed to EEV2

23:54, Figure 12. on page 35, On the right there is Don Mehl, the author of the book! He designed some of these stuff.

DAVE! Look at the poster under a UV light!

Mailbag segment ❤️❤️❤️❤️

Hi Dave I enjoy your videos very much I learn a lot I'm building a dual bench power supply I'm using a switch mode module to power it and I'm using 2 DPS5005 modules to regulate voltage and current I was wondering if I needed an earth ground binding post for negative output or can I just use my 2 outputs to achieve that

i really need this retroball pong thing 😍

Hey i bought EEVBlog BM235 true rms DMM. For no reason i can explain.the highest voltage i used it for was 125 volt ac and it worked fine.the day after i turn it on and it flash the display as normal with all sign on and then it beeps and display say InEr on everything exept from A/MA dec%ac and ua dc%ac..Batteries show 1.34volt so they are okey.the fuses looks fine.it just dont work enymore.is it a reset button and a false error mode it has gone in.very dissapointing.had it for a year not much used either.in 45 years i never it is the second multimeter that has broke.do i realy have to send this all the way to austalia to get it fixed.my reson for buying it was quality and improvments implemented by you if i am not mistaken.my cheap yellow 7 dollar multimeter if not as presise and many other thing it has never failed.This was not what i expected for a multimeter that should be my main multimeter in my repair shop.i am shurley pissed rigth know.

1:50 Why is everything so heavy? Is there something wrong with the gravity in Australia?

what on earth was that board with all the virtex's and asics at the end? It must have cost a fortune in its day

"Crazy Mother F'ers" ~ What Americans call Australians

@eevblog Boom means tree in belgium :D

Oh great, it's almost 3am and I can't sleep

I would have probably opened that Big Clown case with my head under the level of the desk, (Exploding foam snakes ? HUH?) Some nice gear in there though.

I half expected the Indiegogo package to be from one of the campaigns you have Tweeted about illegally using your EEVblog logo! Glad I was wrong as it does look like a cool kit... albeit a bit expensive. 25:11

18:10 - ...but does it test transistors? :)

Damn. I thought the first long tube was going to be a Bluetooth umbrella ;)

Hello from Czech Republic!

When it's about USB meters I would highly recomment UNI-T UT658, very cheap, like few bucks, displays V/A/mAh at once and IT HAS V/A CALIBRATION MENU!!!

That crusty meter needed a 22.5v battery (412)

0:15 obviously a lightsaber replacement beam

as soon as I seen that ruler, I went and got two.

(37:30) I think your problem may be connected to the problem with smart phones but slightly differently. With a smart phone, if you hold the display with your fingers around the touch screen area, then the touch screen doesn't operate propaerly. This device has little isolation from the edges.

That's like a crazy conspiracy theorist cork board.

thumbs up for the FAIL hammer.. that was great

Digital Machinist may be something like American Machinist mag?

you said that you recommend getting published before...? what do you mean by that, Dave?

1:48 - I've got a shower curtain that's smaller than that!

my car is about that rusted :( damn road salt.

Ive got no problem with Yankee. I'm near new york city so it's common here. I guess it's different for American southerners. The Dutch settlers in new york called the English "john cheese" not sure of the spelling but that's where ive heard its from.

"Sydney is Sydney"

What are the T&M instruments that you have Dave. Let us know.

most of the secret war stuff was probably printed from wikipedia 😂

How to buy that poster in non-USA? Like... Europe?

Love me a new mailbag!

19:00 We can rebuild him. We have the technology.

22:10 Would that also work for an oscilloscope? :P

20:55.. Looks like it's the first time that you encountered heatsink compound.. :whistle:

You miss a lot of time sensitive stuff, maybe you should vet the items as they come in and have a second shelf allocated to CLEARLY marked time sensitive stuff. just a thought. I still rate your channel as the best for video quality and information, no-one ever stops learning.. keep it up.. on to video 2000 (Not the VHS format I might add) lol

Yankee actually comes from Jan Kees. A dutch name.

brymen 232 EEV blog verson 1 around one year old:This must be i hikkup or intermitend fail.let it be on Ua dc/ac for some minutes and then turned the swich back to turn it off but i noticed that the next after A/ma is diode and capasi...this setting was now no in er message tried the neckt setting MVtemp dc/ac and so on to off.and it worked fine it seems.So i tried to turn it from off to volt dc/ac and no beeping an in error message? can someone explain this one. cause it seems fine know.intermitten fault?.

I call that a knife

It's a moldy meter!

Of course a moldymeeda will be crusty.

4:15 demonitized.

Multimeter? More like a moldymeter.

I laughed when you went tiny!

Jonas! Hi from fellow social worker!!

The packing peanuts in with the little red clown suitcase should have been orange, so they'd look like Circus Peanut candies. (I used to actually eat those when I was a kid. They're truly awful.)