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Arg! As a sonar guy, I can tell you that the function of the TGC is to increase the receiver gain as time elapses from when the pulse was transmitted. Without this, the signal would be huge (and clipping) right after the transmit pulse ended, and buried in the A/D's quantizing noise at larger time delays from the end of the transmit pulse. In many radar and sonar units, this is called TVG (Time Varying Gain).

6:25 E-net is Ethernet: that’s an AUI connector, to which one attaches an Ethernet transceiver for the physical medium used (10Base-5, 10Base-2, or 10Base-T).

Assuming it's standard SCSI, you really should rip out and hang on to that MO drive and disk - those are small and rare enough to be interesting to a computing museum.

44:00 on the Advnaced IF Output board top left corner the two ceramic chips are Cartesian data (Real and Imaginary) into Polar form (Magnitude and Phase) converts (PDSP16330A) made by GEC-Plessey Semiconductor (GPS).

You can easily buy an ultrasound that has more capability than this which will also fit in a briefcase and weigh about as much as a heavy laptop. Ultrasound technology has come on leaps and bounds in recent years. For an example look up the Philips CX50.

260 pins per plug, (yes i am that sad)

The BOM must look like a distributor's inventory stock. What is BOM management like at this scale?

Wow, this is a blast from the past for me! Was working on these when I got into ultrasound field service. If you want to see newer examples, we've got a ton of them around here I have access to.

I guess the E-NET is Ethernet but 10Base5 (AUI), link: en.wikipedia.org/wiki/Attachment_Unit_Interface

10:00 Dallas1286? Thats why they threw it away! After decades the Battery is empty! Helped another Doc save his unit by changing that stuff ! He didn´t want to learn how to handle a new unit because of his age...

The chassis looks like it's international space station ready. Very well built machine.

WOW! That machine is absolutely amazing! My mind is blown. SO many ICs. Its never ending. Think of the people that designed and layed out these boards. Absolute geniuses. Remember, this was designed in the MS-DOS era, there was no GUI CAD software 30 years ago. It must've taken months if not years to get it right. The schematic diagrams must be 1000 pages long. He should frame some of those PCBs and put them on the wall. I would.

This video is a long time in the making. I've been waiting for this video for ages thankyou!

I used to service these units when they were still in use. They weren't as popular as the higher-end HDI 5000, as they didn't have as good of image quality. ATL was purchased by Philips Medical, BTW, so they still exist within that corporation. The panel on the front was referred to as the "mux" panel (multiplexer). It is responsible for switching between the three transducer input connectors. Those highly shielded boards the the mux panel plugs into are called the front end boards. They are responsible for beam forming. Each transducer is a bit different (i.e. linear, convex, sector, etc.) and these boards compensate for each individual channel on any given transducer. Each front end board contains an array of preamps that are controlled by the software. They can be swapped around in order to troubleshoot faults in the boards. Information for each individual transducer is stored on a circuit board inside the large connector for that transducer. That's why the connector housing is so large. Color, PW and other functions are added by the boards connected to these front end boards (just keeping it simple). By the time the signal leaves the front end section, it has been processed into a raw image with X,Y,Z and direction of flow information. This then goes to the "back end" section of the unit, where the image is processed, demographics are added and the image is displayed on the monitor. The MO disk on the back of the unit is sometimes a bootable disk. It can be used to restore the hard drive when it gets corrupt. I can't remember all of the commands, but I think one of them is when you press "super key" and "0" at the same time, it will put you into service mode. Thanks for the tear-down video. It brought back a lot of memories!

8:15 "so many boards and so many things we can talk about this could be 2 hour long video" Why not?

6:26 That E-Net is using an older style Ethernet connection using DB series connectors. We used them on some of our network equipment back in the 1990s.

Gold-glad ceramic packages always feel special to me.

Raytheon chips are hardened against radiation (RF, and Alpha, Beta, & X). They are used a lot in military applications.

Symbios logic 53C710 is a SCSI controller. I have a 53C865

The vid at the begining, I could swear that I've seen it YEARS ago!

So cool you got your hands on one of those. In the 80s my grandfather worked for HP and machined out most of the parts for the first prototype ultrasound machine made by HP.

Wife blew out her ankle at netball. Went to Doctor “ how many days” not our GP as it’s just a normal netball thing, no big deal.............. X ray. No busted bones. Ultrasound. All good no problemos. Still not better after ages. Go to our GP and he gets a bit pissed and orders an MRI, ligament no longer connected. One full ankle reco later. Ultrasound was piss poor for this scenario

Never apologize for the length of a video. Bored people can scrub around and see the bits they want to see. I appreciate the detail -- were it not for your teardowns, I'd probably never see most of this stuff (let alone get the insight!).

Great find!! I found an HDI-5000 on the streets of Manhattan NY in 2015. Did a teardown with lots of glorious photos. *Grabs popcorn 🍿*

Those Custom Connectors actually look like Cannon DL series. Used on some high end audio equipment (Solid State Logic 4000, 6000, and 9000 mixing consoles)

I thought I was interested in what looked like Tracy Island in the first part of the video, but then I saw the Sinclair C5 in the background at 2:14!

At 45:40 you can see an x86 Processor by AMD. An 80186-16. You don't see them all that much (or rather more outside of an IBM compatible PC than inside one)

I have worked with this 3000 model, it was the cheaper version of the hdi5000. I still remember the feeling of the buttons! My first years as a ultrasound technician in the hospital... Memories...

SYMBIOS LOGIC? That looks like a SCSI Host Controller. A dead Givaway is the SCSI LED a thumb or two next to it ;)

AMI is American Megatrends Inc, the people who used to write BIOSs amongst many other things.

Nice teardown! Was looking forward to this one. Wondered what happened to it since you bunkered it years ago. As expected, there's more silicone in this thing than on the beaches around Sydney

I haven't been inside a piece of medical equipment since I was a kid. My dad used to work for Datex Ohmeda. They had since been bought out by Instrumentarium, which was then bought out by General Electric, but back then my dad was the senior service rep for British Columbia and the Yukon (Canada). He used to go out all the time to hospitals when one of the machines needed servicing, and sometimes they'd just ship them to our house so he could service them there. In which case, I got to see their guts. I don't know if Ohmeda did ultrasound machines, but he did get a lot of anaesthetic machines and ventilators to service.

50 min teardown video? I like it!

we've been waiting for so long, almost forgot about this. better late than never!

The PDSP16630 is a very interesting chip...Plessey called it a Pythagoras Processor. It does conversion of Cartesian coordinates to polar coordinates.

Fun fact, IDT was once an owner of the old AWA Semiconductor fab in Sydney.

I worked for a cardiovascular place and that gap you said might be for a printer often had a high end VHS recorder fitted to enable analysis & reporting away from the machine.

That "E-net" (db15?) port probably attached to a "thicknet" Ethernet transciever for the old coaxial networking standard. I've never had to mess with it, but I've heard it was a pita.

hah googling this thing results in EEVBlog links being the top hits :)

"What's e-net?" Pretty early ethernet connection. Looks like a pretty standard vme chassis and backplane for high frequency and low noise operation and computing.

Dave. Have you done a tear down of the HP9845 calculator appearing in the background at 2:15. Could be an interesting device to have a look inside. I seem to remember HP devoted a whole issue of the HP Journal to describing the design and construction of this calculator when it was released.

Would be interesting to see a modern version stipped down to see the difference in components, etc.

I used to design imaging sonar with similar principles. All that digital does indeed go into one FPGA.

E-net is actually Ethernet. That's an old AUI transceiver port. Plug in your 10 base-t transceiver and you'll be right as rain.

that control panel tho, mmm, trackball, nice looking keyboard, faders, giant buttons.. do want

Torn ACL diagnosis... Ultrasound is not the right tool for the right job. Those sliders are the gain controls for different depths. I am totally enjoying this video!

@3:30 " Dammit Jim, I'm an engineer, not a doctor."

The Chip manufacturer "MHS" was "Matra MHS", basically one subsidiary of the european AEG group, which as electrical/ electronics Dept. was owned by Daimler-Benz group. (Can be found in "The European Electronics Industry Towards 1992 - A Profile of Market Leaders", written by Andrew E Fletcher

Yes, ultrasonic cleaners and digital calipers are my favorite tools.

MCM62990 is a high speed SRAM, 4K x4. Started in that group a couple yrs after that part came out. Back then 15 ns was considered fast. By late 90’s we had 4ns parts. BiCMOS.

I was wondering at the beginning 'damn, Dave is looking real fit and buff' :D

Thanx for the teardown Dave...

Just gotta say, Dave, 5 years go by and you haven't aged a day! (The wonders of keeping healthy and fit!)

Those chips labeled "MHS" are mfg'd by "Multi-Health Systems Inc.", hence the acronym "MHS". They are still in business and amazingly still making chips for ultrasound machines.

That is very similar to the ultrasound machine used on me at an office in Ukraine not too long ago. Cost me $1.35 to get an ultrasound to identify the sudden pain in my side being a kidney stone. The office was a simple bare room and just that machine, table and a cabinet with supplies. When I say bare, I mean unpainted concrete bunker walls. The doctor's entire life and ability to feed his family probably depended on that machine working. Back in the states, Paid $500 at a clinic on a modern state-of-the-art machine to get the exact same results. I was impressed and also made aware of how overpriced our medical system is.

I used press fit connectors in the past, make sure you define the right hole size and they are super reliable. Order a couple of extra PCB's and you can press the connector yourself buy using a vise.

The Moment when you are realising that you are watching this Aussi Guy for 7-8 Years already...

Maybe do a decap series? Considering how much silicon you have got you can just batch process them. Its also very easy. You can blowtorch the ic package directly or use a 100w halogen lamp to do a controlled destruction.

Interesting. The grand daddy of my favorite imaging tool! LOL!

Am I watching mikeselectricstuff?

Hey Dave Thank U for your Hard work. Could it be that this is an re upload? I should have watched the Video before Comenting

A Sinclair C5! Man, I thought it was futuristic as a 12-year old. 😂🤣

The control panel wants repurposing as a Kerbal Space Program control panel! =)

Don't worry about the length, love when you waffle on. Really incredible bit of tech. One has to wonder, given the strict requirements for medical equipment, and the obvious design complexity, how much have modern machines really changed? As you say, it would be very interesting to compare.

Yes, please tear down all the ultrasound heads, I want to see what's in them and what's the difference between them!

Replace the fried capacitor see if that fixes the device and donate or sell cheaply to some elderly care facility.

Definitely deserves a part 2 !

Pdsp16330a c0 Pythagorean data processor probably vector graphics angular converters.

Excellent teardown Dave, BTW Ratheon second sourced many Logic and IDT parts, i have seen many in Quantel products.

Symbios Logic did SCSI controllers. They started as part of AT&T, then were sold to NCR, and then spun off. LSI acquired them and became LSI Logic.

Pretty sure that the initial board with the serial port on it and the big 'eth' port is actually a very old ethernet connection network card, although I can't tell you which type since I haven't used that spec for a *long* time (last time I saw it was late 90's). They were used a lot for a long time, but the old ring-types requiring terminators and so on have been long gone for twenty-odd years now, replaced with RJ45.

ECG is used with ultrasound to calculate the difference of volume in the heart chambers (systolic and diastolic). This is used to calculate the flow rate of the pump (the heart).

Can you send this thing to me for recycling? Lol!

I remember those connectors from ATE equipment, where they were used to connect the DUT cable assemblies to the front of the rack, and from there the connectors were split out to a set of power supplies, giving a variety of power supplies, 115VAC 400Hz 3 phase, each phase adjustable voltage wise, and with the actual output voltage read along with the current by both the power supply itself and the ATE acquisition system. Then 28VDC, up to 50A, as some of the stuff needed that amount of power to operate. Then a massive patch panel, wheere you had a 200 by 200 pin array of interconnects, so you could have the input and output lines connected to the simulation and readout side. Those connectors are rated for low noise, even after 1000 insertion cycles, and you really do not want to know the cost of them, though they do have the ability to replace individual pins and sockets if they do fail. Perhaps not with the ultrasound, as they likely potted the plug. I would hazard half of those added modification wires are there to repair broken inner traces in the boards, as they likely were only tested and passed in the PCB plant, but after the PCB was assembled and soldered they would find the failed traces that did not survive the reflow cycle during test. Expensive board, expensive components but cheaper to do diagnosis and place the wires than scrap the entire board that mostly works, and hope the next board is perfect. IBM Deathstar, not likely to still work, though there are a lot of glued down components, using some quality clear acetoxy free silicone instead of the crusty glue.

It's been a while since you got that railway diorama, Dave

Looking forward to a Lunar Module teardown . Hopefully they put one up on sale on eBay and you win . Even better , a Falcon 9 rocket :) :)

Old medical equipment like this fascinates me. If it's functional, what can I do with it? Find uses around the house, on the car? If it has a PC based front end, can I just load up DOS and play Doom on it? If it's non-functional, can I re-use any other parts, again in particular any PC-based stuff? Of course if all else fails, since no expense was spared in the components these are great for parts harvesting! I'd also like to see what might be lurking on all of the flash/eeprom chips.

The shortest connection between two points is a straight line (18:00), not 45° or 90°.

Dave, if you haven't scrapped the chassis yet.... they make great mobile carts for other equipment. Add some batteries, inverter, and whatever equipment you need. Oh and those power rectifiers with the heat sink you couldn't get off ... they look like a Vicor model. And yes they're a pain to scrap...

The traces on those power boards look really unprofessional. Maybe they had an intern who could lay those boards out while the pro's worked on the real stuff? The rest of the system looks great.

very interesting, ive taken apart new laptop or "on wheels" ultrasound machines and its crazy to see the change over time!

Nat Semi DP8392! I was one of the process engineers (whilst I was doing my Eng Degree) in Gourock, Scotland when that was running through the new 8 inch fabrication line in about 1988 or so! I've always wondered who used that bugger.

39:20 XWindow (no 's' at the end) is not an operating system. It's the GUI environment used on UNIX-like operating systems.

Given Raytheon work on radars and other sensors, it kind of makes sense to find their stuff in something dealing with ultrasound imaging.

This is p°rn. Teardown of the physical doodle vibrating thingy needed. Can't wait to see a teardown of an MRI machine also. This is some fascinating technology. It probably won't fit in the lab.

Hmm, I wonder if it took longer to engineer all those boards or for Dave to make this video....

What is the word Dave says at 42:47? Like "byola" or "byula"... I've heard that in the other videos too. Hmm

The D-sub "e-net" connector is probably for a 10BASE5 Ethernet MAU? *gag*

I wish you would've taken off the heat sink from that Intel processor, I would have loved to know whether it's from their x86 range and if so, whether it was a 386 or a 486.

I can see why these devices used to cost so much. After the teardown, what do you do with all these boards? I can't see too many components that are usable in a modern environment.

Repairing this scanner and consequent dipping into it with oscilloscope, watching waveforms of the electrical signal that is being sent to transducer and received from the scanned media would be PRICELESS CONTENT. Please, consider making such video before doing destructive teardown of probing heads.

The original Actels were CPLDs with write-once anti-fuses for programming. From sometime in the late 80s. Claimed to be alpha particle proof, used on Mars rovers according to their blurbs.

No way. I asked for it a loooong time ago. Thank you very much, sir!

You can get some basic ultrasound scanners that are bluetooth and charge wirelessly. They are just the handset, no wire no terminal or even holes in the case just an ipad and a qi charger.

Finally you made this video

I was thinking, "I know he's already done a video on an ultrasound machine".

Must be a 486 or below for the Intel processor. Fans weren't really needed for processors before the Pentium assuming you had good airflow and such. That TI 340 looks like a cool chip I never knew it was used in many arcade classics!

You would have to re-install the software to make it work. The users probably unplugged the machine while powered up and corrupted the software. Pretty common problem. The disks are usually attached to the inside of the side casing in a plastic envelope.

The connector pins seems the same from Apollo AGC

I always figured that the mathematical processing for radar might have a lot in common with that needed for medical imaging. I might be mistaken, but given that Raytheon makes radar equipment, that could explain why a Raytheon chip might show up in medical equipment.