EEVblog
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- Probably the most gorgeous test gear teardown yet!
A master class in modular product design and design for servicing, a mystery retro bit of test gear from the bunker that was found in a dumpster, worth US$45k new in today's money.
Forum: www.eevblog.co...
#DumpsterDiving #Teardown #Mystery
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That thing isn't simply an AC millivoltmeter. It is a selective level meter, also called a frequency selective voltmeter. It is essentially a laboratory-grade radio receiver with a huge input level range (microvolts to volts without overloading), and a hyper-accurately calibrated "S-meter". If you hook the input to a longwire antenna, you can use the speaker to listen to frequencies from VLF up through HF. The major use of these was in telco central offices and the like, for checking various channels of carrier (FDM) systems. You can enter a specific frequency of interest, and measure the signal level at that specific frequency, while tuning out unwanted ones. A very specialized bit of gear, but lots of fun to play around with. I have an HP 3586C, which is similar in vintage, build quality, and functionality.
This thing is a DEFINITE candidate for a repair and play around series. Manuals available free online ftb.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/Wandel_and_Goltermann
@Nikki Cooper No problem.
Seconding for a repair video, its got to be a joy to repair
Like I said, a fancy-pancy millivoltmeter :-P
Amazing how defensive some people get over esoteric instruments hardly anyone would ever have a need to recognize, let alone have a use for them. After all...
it's just a millivoltmeter.
@@tiny_toilet every RF measurement stuff is a millivoltmeter in some way or another :)
There is some dude in a old age retirement home in Germany who's forgotten his wife's name but can recite the calibration manual entirely.
Guaranteed!
Probably because he spent more time working on it than with his wife.
Heck...I am only 55 & I can do that!
@@russellhltn1396 heyoo!
David Brewer even with only half a brain still working he could still calibrate this thing perfectly
Dave you should definitely repair this beauty of an instrument! I think it deserves to repaired at least.
Like if you also want Dave to repair this baby!
To what end? If anything, it deserves to be thrown up on eBay for 99c NR starting bid for someone who either wants to fix and use themselves or part it out. Why would Dave want to waste his time on something he'll never have a use for?
@@tiny_toilet for TH-cam purposes of course. We all want to see it working
Good luck with that. Where the hell do you start? There is *_SO_* much stuff. If the power supply works ok, then where do you go from there. Any one of those modules could have a failed component that causes it to not work. But i suspect it IS the power supply. Thou shall check voltages.
I think Dave might need to change his underwear after this one.
Never seen that much penetration in an eevblog video...
I know I do! One of the most impressive pieces of test equipment I've ever seen.
god, I only hope, it's hinged!
That truly is a stunning example of both electronic and mechanical engineering, the layout, machining, everything had so much thought put into it.
Masterclass indeed. You should put the call out to see if any of the original design team are still around and see if you can get some comments from them. That would be a must watch, no question. This is a seriously stunning piece of system design.
"it just oozes quality" ... wipe the bench when you're finished, mate.
cehfully collect all the quality and put it in an airtoight containah, thin put it in tha fridge to keep it fresh
That thing needs to be put in a museum. Absolutely beautiful work!
I think you missed a whole bunch of silver cans on the underside when you folded the panel out on the bottom. You show them all at 26:15 but we never get to see under them.
Oops, really?
@@EEVblog I think so as well!
Yup, that is exactly what I was about to write. :-)
Its got 4 layers of cans in it, fold out section at the bottom, fixed layer in the middle, then the fold out section with all the logic on at the top, finest German engineering there.
Yep
One of the best EEVblogs ever. Gone is the critical and cynical Dave - here we have the real deal - a man that, when presented with a piece of incredible precision engineering, can be transformed into a kid on Christmas morning. Just inspiring - thanks Dave.
"All the RF guys will say 'aghhh 25MHz, that's DC!'"
I feel personally attacked 😂
This is finest stuff from the 90´s. The latest datecode I found on the TTL was 98. I worked with W&G HDB3 fiber transmitter and receiver in 1992. At this time you could buy 1-2 nice new cars instead of equipment like this.
A 98 datecode? Weird, to have something like that among all those 82 and 83 datecodes. Maybe a repair?
German viewer here! Mainly just a forum user on the Thermal Camera section. Will get into EE eventually... To get the thermal cameras working. I started a university course that isn't EE just a few weeks ago.
I have no use for something like this, but if I had it, I would gladly sink days into troubleshooting and repairing it as my own little tribute to the engineers that created this beauty.
oh "boat anchor" I always thought you were saying "Bo Dangker" like it was some Australian slang.
Me bo dangker mate. Good on ya.
LOL
It's fun to see (in the reflection of the shiny cans) Dave gesturing behind the camera while talking. I assume he just does that all the time even if nobody can see :)
seeing that thing work would be amazing
Had the same reaction when I disassembled a dumpster found Apple G5 Tower. So much genius, thoughtfulness and ingenious fabrication technics!
you should send this to Mr. Carlson...
No tubes, not interested.
My guess for the plastic covers is that they are /all/ injection molded plastic, some are just metal(chrome) coated. They just didn't plate the ones that didn't need shielding and instead it's a dust cover.
And this is why dumpster diving in the industrial park is a good idea.
From original german brochure:
Messgeräte für Spannungen und Pegel (TF-Bereich)
Bezeichnung BN Jahr Preis*)
Selektivem Pegelmesser SPM-19 from 1980 34.650 DM
(if i did this correctly) 1USD ~ 1.82 DM in 1980 and 1USD (1980) ~ 3 USD (2019) so in current
USD this thing would cost approx. (34650/1.82)*3 = $57,115. Thanks for posting this!
I would love to see a MTBF calculation to MIL spec for this thing.
Must be like 10^9 FIT :D
Love your enthousiasm, it's contageous! keep on making more awesome content! Greetings from the Netherlands
A genuine top 3 teardown, I can barely contain myself, sheer joy! they don't make 'em like that anymore.
When working in power stations back in the 80s, we just loved that W&G shielding.
So very satisfying. Inspirational too. Suddenly I find myself wanting to build little isolation boxes for my eurorack.
Makes the Eurorack modules look shabby! 😂 Love the Subtractive synths. None of that FM rubbish tnx!
If only "modern" instrumentation was built like this. Obviously built to be both "serviced", and "maintained" (calibrated). There are LOTS of adjustments to make this a world class instrument that has accuracy that is second to none. I suspect that a maintenance on this item would take a day of strict reading of a manual and a tweaking screwdriver to get it all set up. What a box!
Great video. How about another one getting it to work again? It's so nicely made you know you need to see it work...
That is absolutely gorgeous piece of engineering.
check the switch, maybe its just the switch
The meter needle moved so it must be getting power.
@@EEVblog ah ok, yes i saw that. 😪 i guess "not a bobby dazzler"
@@EEVblog Thou shall check voltages!! Come-on, you know you want to!
Dave can you make repair attempt video on this pappy ?
I needed a Smoke after watching this !
Dave Jones officially breaks his high pitch excited voice record lol
I'm not German, but most of those things are more or less guessable for a Dutchman:
Verstarker = amplifier (versterker in Dutch)
Vorverstarker = preamplifier (voorversterker in Dutch)
ZF-Verstarker = medium frequency amplifier (MF-versterker in Dutch)
Umsetzer HF = high frequency converter (converter in Dutch, but "omzetter" literally translated gives converter)
Gleichrichter = rectifier (gelijkrichter in Dutch)
Frequenz teiler = frequency divider (frequentie deler in Dutch)
Phasenjitterschaltung = phase and jitter circuit (phase en jitter schakeling in Dutch)
Trager = carrier (drager in Dutch)
Stufe = stage (trap in Dutch; the only German word in this video that looks more like English than Dutch)
Btw, I always thought Rohde & Schwarz stood for skillful engineering, but this beast is on a higher level.
Ive still got three of these in use! Two of them I repaired back to working condition only last year.
Wow, that is like some sci-fi stuff there.
metallitech as long as it’s not functional, the *_fiction will alias for steampunk.
You should take a look at the BNC connectors. They can be removed and replaced with a tool in the little black compatment at the back.
8:27 - Watch that your bits don't all fall out! :)
I have seen similar high spec equipment, and this one piece of equipment had like tiny pipes in it. After awhile of pulling it apart, I was like, perhaps I shouldn't be doing this in case it has chemicals in the pipes that shouldn't be released into the air. Turns out that my thinking is correct, as there was a great case overseas where people tried to strip something containing radioactive materials and spread it around the entire town.
To everybody saying that dave should repair it...Repairing this without painstakingly calibrating it seem bizarre to me. It's not a clock radio, unless it's in the kinda of spec that it deserves to be in, there is very little difference between it being able to turn on or not.
You could take out those boards and frame them to make amazing artwork
Those Germans never fail to make outstanding electronics!
I would never get tired of looking at that. Fantasy Island. Thank You So Very Much.
Send it to Mr. Carlson.
You can buy a lot of Wandel & Goltermann stuff on eBay for almost nothing. Many instruments are no longer needed, like calibrating old analog lines, ATM and SDH stuff, old network testers and such. Many of them are about 25 kg... Just like all that WFM instruments, a Tektronix WFM601A for 50 bucks..
Looks like a spaceship module !
Dayum, son! What kind of dumpsters are you diving in?
A look inside a piece of equipment that if you had to ask the price back in the day, you definitely couldnt afford it.
at last! design so worthy that it could stop Mjolnir flying at light speed.
Dave almost reached Blippi level wonder and excitement.
"Hickledy pickledy" will now be added to my vocabulary.
Glad you saved this,
I wonder how much these things where new, you could probably buy a house for the money
I am really interested in power supply.
It would be great to hear some history of the creation of that device, anybody?
Perhaps the plastic lids are designed to preserve or correct some sort of ground pathway that was giving them trouble when metal cans touched?
Simply amazing piece of equipment! Let’s see if Dave gets it working again; only about 95 caps and 5,000 resistors to test!
And about a million other parts. Anyone of which could have gone bad/shorted/out of spec.
Simon Tay definitely true!
That is a really nice vintage kit. The quality made me leak fluids. It gave me some good ideas as well.
Now for a repair for this amazing piece of equipment :-)
What a lovely well built kit, well spotted in that skip ! 👍👏👏👏👏🥂🙏
Near the center of the image two short silver wires, perhaps an adjustable LC circuit . 12:21
how much did this cost new?
I wouldn't want to have asked back then. Quarter of a million perhaps? Also How many of these things were made?
@@gorillaau yeah that's what I was thinking .... something like that. the end of the video Dave estimates tens of thousands .... i find that hard to believe its just too much..... the same as a cheap apartment in today's money
@@SuperStststststst I suspect that if you are in the market for a piece of gear like that back in the day, if you have to ask what it costs, you can't afford it.
"Quarter of a million perhaps" ...and the rest.
@@simontay4851 my next jump in guessing the cost of the item in question: a cool half million.
The amount of die cast enclosures is staggering. Stunning piece of kit. They don't build them like the used to.
It's an FDM telephone trunk tester!
FDM? Not TDM?
TDM is most common for early European landlines, used rotating multiplexer switches for that...
@@QoraxAudio
Frequency division multiplexing
HF SSB over coax
@@QoraxAudio
You can also program it to play Christmas tunes!
@@_a.z Lol nice, I know about FDM, but I've never heard of HF SSB before 😜
What's the point of a single sideband?
@@QoraxAudio
Half the bandwidth 1/4 the power
This is the most extreme graybeard construction you've ever torn down!
Look at all the trimpots in all the cans with alien writings on them! :D
I have not noticed anything about picture composition or framing. It usually says that there is nothing wrong with it.. Thinking about the way you frame a picture is important and soon becomes second nature. There are some channels, now that i think of it, that also put time and effort into framing.. livedotcom and This Old Tony comes to mind first, both are very good at showing things in the way that it is easy to follow.
Träger = Carrier
Stefan Hintz yes that was clearly audible in the dialog.
Nice bit of Kit, but GREAT FRAMING!!
And for my next magic trick..........more cans!!!
Thanks Dave!
Your style is appreciated 👍
I didn't hear Dave so excited since... probably ever :)
As Jeremy Clarkson once said. "I've had a crisis!"
10:37 - 'vorverstarker' translates to 'pre-energized' (?)
UPDATE: a google search reveals that it translates to 'preamplifier' :)
Your German is almost as good as Dave's!
The relays in the metal cans will almost certainly be mercury wetted contacts. Very reliable!
It's really looks like Rohde & Schwarz from that time, even the useful cheat sheet and the blue case.
all of this would probably be put on 1 board, and a few IC's and a big ass FPGA nowadays. Id love to know the current draw on this beastie.
Did it bring a tear to your eye Dave? :)
I have a Singer “sewing machine” service monitor from the 70s it’s built just like that folding and full of pixie dust!
10:24 Vorverstärker= preamplifier.
And here we see the work of Tetris Masters.
wow. now i feel bad for every "that's almost DC" rf-circuit I've built before
That's quite a score, it needs to come back alive!
pleas repair this thing dave. Its a HUGE system that looks like a bear to troubblehoot and would make for a really fun video
This thing can pickup signals from another galaxy
EERotica...
Trägerphasem. = Trägerphasemodulator = Carrier phase modulator
From now on I too will use the word "pornographic" to describe wonderful examples of test equipment. Seriously, that is some sexy engineering right there...
Maybe a warning to the Tech, Components critical, use no substitutions. 12:33
please try to repair it :)
I see all the German translations have already been provided. But maybe an Australian to US English translation is not (???). I mean "Penetrator" . Around here it is called a feed-thru capacitor.
I wonder where is that dumpster???
looks like whiskers on the platings...
I’ve never heard of the term “penetrators” before. Sounds almost pornographic. I’ve always called them “feed-throughs”.
I like the framing
The excitement!
VorverstÄrker Preamplifier
This is an very serious meter. You sell?
No-one, but no-one, has acknowledged the Isaac Asimov "2001" reference?
"My God... it's full of stars!..."
Have you tried WD40 on your rusty german?
This thing is absolutely amazing, i am curious about how many engineers have worked how long on it. Probably without CAD in these days..
Unfortunately i cannot give a second thumb up, which this video really deserves.
In english.....what is this actually used for ?
That thing is a complete blivit. It goes pith, bang, whirr in five dimensions.