Waiting for Dave to find one of these in the garbage room, brand new in box.

We had a shiny moment of no start-up time in history, right between "wait for the tubes/valves to heat" and "wait for system to boot"....

28:25 I was screaming, "Push it in. Push the knob in. Please post the knob in!" LOL

The thing I love about this channel -- the most, actually -- is that I get to see and get a nice little two-dollar tour of bench equipment I'll never be able to afford and will never hope to have. Yet, the channel also shows off the bargain equipment that I can afford and make use of, too, from time to time. Lovely stuff as always. Many thanks.

I'm not exactly sure why I watch your channel, because I have no idea what you're talking about 95% of the time, but for some reason I really enjoy your videos. I have managed to glean a little bit of knowledge from you, however. Thank you for that.

Colorblind here: channel 1 matched the color okay enough for me. The problem is channel 2 and 4. Almost Identical colors for me :)

Looks orange to me Dave. I mean, that’s clearly orange.... might want have those old mark one eyeballs checked Dave

it's so awesome seeing a pretty complex machine like that and all of it's components working together correctly

OMG up to $9,000 AUD for that sucker. I'll stick with my first-year-apprentice-built power supply for now.

25:30 Looks close enough to orange on my screen. In fact in my photoshop screenshot it become RGB-140 , 115, 61 whereas real orange is 255, 165,0 ; so perhaps it needed a little more red, a little more green, and a little less blue, but then the yellow is equally off at RGB-168,166,111 where it should be 255,255,0.

31:06 35:03 Dave please use the arrows on the right ">" of the menus to acces advanced options!

Right Arrows in User Interface shows by taping that menu, you can go in, deeper!

Great PSU, Great video! I got really envious. I'm all set up regarding PSUs for now, next item on my shopping list is a Keithley DAQ6510, but good to know this beauty. Thanks for sharing Dave.

I'd like to see some outout noise while under load tests as I'm an old fashioned linear " Cor look at the massive toroid transformer " type .

At first I was like "Oh, I built my own but it's pretty limited. Maybe I'll finally get a professional unit.", but then I was like "Holy SH!T that bastard is expensive!"

Oh man I love the look of this. And it's R&S! Signal path would also like a look at this. Thanks DJ! Edit - Just finished watching. wow. what a unit. In love.

Beautiful! I need to, eventually, get a proper bench/rack supply... Currently I am running my homebrew ATX-PSU-based one which does great for most things but, occasionally, I could use some more amps from the variable output. I THINK I can re-work the wiring someday but I think I should probably just snag a good pre-owned unit, maybe an old HP? Any suggestions on model?

Response to a pulsed, resistive load would be interesting. And values of the output capacitors. And actual response time of current source.

It's nice when you get 5,000 USD equipment to play around with when you didn't even ask for it. But then, I am sure Dave's recommendation is worth every cent of it.

Good design and manufacture. Usually not cheap, but usually worth it, if you need more than a hobbyist needs.

You will have to play around with it more, but my guess on the safety limit settings is how high the user can set things on the front panel without coming back into that menu.

"I'd love a pro power supply"... sees price... "Ah I love my Riden rd6006 - it'll do me like forever"

I like the modular design of this board. No space constraints and it is nice.

20:09 could be a dual half-bridge LLC resonant converter due to the wide output voltage range.

The older ones (HMP series) do have "auto remote sensing" if you wanna call it that way. They have a resistor inside between the output- and sense-terminals (something in the range of 1~10kOhms). If you don't plug in anything to the sense terminals, that resistor just feeds the voltage straight from the output terminals into the voltage feedback. But as soon as you plug anything into the sense terminals on the front or back - which will have a resistance signifincantly lower than 1k - that will "override" the resistor, so then the voltage from the sense terminals will be fed into the voltage feedback.

Dave, what is the gadget that you have on your BK Precision DC Load at 28:46 that allows you to use banana plugs on those binding posts? I've been trying to find something like this without success. Thanks.

For those playing along at home. Conres has them (NGP814) in-stock, for sale right now, brand new on their Ebay store......FIVE GRAND!!!! WOOOOOO CHILD!!!!

So does the delay option mean that as your adjusting the voltage it won't change live until you're done?

I feel like the power supply's that I have wouldnt measure 3mV off at open circuit and 1mA off at open. Is there a calibration procedure?

Where did you get the terminal adaptor that you are using on your electronic load please?

What an amazing and satisfying design. lovin' it.

That RJ45 cable.... somebody was like "oh shit, we need to add Ethernet, but no time to redesign boards :D".

It would be nice if that user-defined button would light up when whatever it's controlling is toggled on (for the functions that toggle). Seems like that would have been a fairly simple thing to build in to it.

Hi Dave, Thanks for posting. As for the power supply it's no doubt it is good as usual, but I have some notes on how to design of it 1. This design makes the possibility of maintenance difficult, meaning that it is not easy to service in the event of a problem, because in this case you must disassemble the whole device and remove all jacks in order to perform the maintenance process. 2. In fact, I am surprised that they installed the parts on the coolers and did not install the parts with screws or part screw in bracket to secure the parts right. Thanks god bless

This is nice gear. I would like to see a computer powered by this power supply and see how much power each connector uses. Can this power supply show combined power usage for several channels? What about over power protection for e.g. channel 1 and 2 added together?

9:45 Those must be the front ends for analog control inputs. There's two more shunts behind the mains ferrite bead, so maybe 2 per each of 4 channels? I doubt these are just power rails because they lack inductors to be switch-mode and thermal design features to be linear regs. Also what would those sophisticated shunts be for? Also, that huge switch-mode thing on the right seems to be generating 4 isolated bipolar rails for all the opamps in each PSU channel.

If you did want say, 20V at 20A, could you set Channel 1 and 2 to 10V @ 20A and hook them in series? To have the voltage stack?

Hi Dave, would you put a LED across an output in CC mode at a high voltage and turn off and on the channel please? Or use any low current load and measure the output voltage with a scope in CC mode. Because the other Rohde & Schwarz power supplies on your bench have a horrible slow current control.

Could you do a video about constant resistance? I remember you've mentioned it basically every time you mentioned a power supply from like episode 100. Why does constant resistance fuck with power supplies?

One of your spare ones wouldn't be bored here in Denmark. I could really use one for refurbishing/renovating my JVC HR-S5000 Super-VHS machine and for observing what impact the (hopefully minimal) ripple from a R&S has on the video circuitries, compared to the original JVC Power Supply Unit.

Where did you get that red clamp/banana plug brace for the BK precision? Thanks!

Dave please do a complete review on this PSU.

Can you review whatever R&S software makes use of the LAN connection?

Hey @EEVblog Dave, where did you get the red screw-terminal to Banana plug adapter for the BK Precision DC load? Do please let me know, thanks!

I'm sure Mrs. EEVblog has one of these at home - a happy love life is key and if a power supply is what turns Dave on, that's just fine 😷

I think I’ll need to check Dave’s dumpster to see if there are any old power supplies he didn’t need anymore :)

This looks very nice, it's on the shortlist as soon as my vintage Thurlby PSU gives up!

Wondering about the longevity of that adhesive tape that is sticking everything to the heatsinks...

I wish they had fit in a few more buttons. Making the screen a bit smaller in height and adding a row of buttons to access specific functions below it might be nice.

Fantastic craftsmanship in the inside.. looks like a very high end audio amplifier..the likes of Burmester, MBL, T+A, darTZEEL, Avantegarde..and the name goes on.

How bad are ripple & noise on those things? I need PSU with

Try connecting a 200W DC brushed motor to it, and watch it destroy itself from the inductive spikes.

i really do like the fact that it comes with 2 32v 20A channels and 2 64v 10A channels, i find it very annoying to track 2 channels and bust out the special cables for when i want to work with 48v devices

My impression from this video is that at R&S, MBAs are trying to cut costs at every corner, and the engineering department is fighting them tooth-and-nail. Prime example in the cables being soldered to the boards. Sure, most certainly it doesn't affect performance, but detracts from the "perfectly engineered" feeling. Maybe for a few tens of dollars in cost reductions in a many-thousand-dollar device.

What's the difference between a choke and an inductor? I know a choke filters out noise & an inductor stores electricity. But other than that, is there a difference?

What is with the unconnected fpc connector on the front panel board? It looks like the biggest one on there and its unconnected? I thought this was the top of the range.

Hello friend. Thanks for the video. I have a question. We have the same power supply in the lab. I want to control the output current ramp and voltage ramp via computer. For example it is gonna be on mode for 5 seconds, then it will be turned off, etc. Any advice?

Looks quite nice, I suppose it's just lab-grade so hence the extreme complexity and high price. Would've liked to have seen independent modules for each channel, cheaper and easier to repair and/or enables upgrading.

The closed caption option is absolutely hilarious translating Australian slang haha.... Gorgeous looking piece of gear....

5:19 “Notice all the big cable ties” Doesn’t mention the ferrite core chokes.

If you have too many power supplies Dave, happy to take one off your hands, thanks mate.

Dave the Power side on the Ethernetcable is the POE - that means if you don't have a AC Powercable connected so you can get the full 800Watt Power over the POE (Power over Ethernet cable) too. - That was only a joke :-)

With built-in WiFi you should be able to control it from any PC over the internet, could be useful for remote control and monitoring

Where can I get that adapter for the BK Precision 8000 for the banana plugs?

Why would it be good to fuse both the live and neutral? Surely it costs more and if the neutral blows it's just going to leave a live circuit?

Dam Dave wish you hadn't edited out the ten minute rant on resonant converters! I for one would have loved to hear it, and I'm sure to not be the only one! When it comes to the EEVblog there's no such thing as a video that's too long!

The overvoltage protection in a respectable power supply does little more than that. It should have a "crowbar circuit" i.e. a transistor or a thyristor that puts a short circuit across the output terminals. That is needed to protect connected electronics from a situation when, say, it's powered from multiple power rails and high voltage is leaking from one rail to another.

Love it! Wish I could afford it for my home lab.

lots of great work went into that - definitely looks worth the cost.

Nice to have a video overview of the inside, but after listening to this video I will watch EEV videos without sound, if any.

20:46 What's the name of the thing the wires are crimped into? Is that something custom to R&S or is it something you can get at a place like Mouser?

That internal ethernet cable should probably be STP to prevent internal noise affecting the networking..? Cool device.

color must have fallen out of daves eyes downunder.... i have no problem seeing the difference...

something about top-end circuit boards that just look so CLEAN

having HMP4040 in the lab, the UI of the NGP800 really looks a lot better. Will have to make do with what I have, I guess.

Just finished watching and as usual, awesome video. Amazing piece of equipment but what would you expect from R&S, am I right? Love these videos, Dave. I would like to see a video on using the logging function and the Wifi connection. Like, set it up to charge a battery and log it and then lets see what bells and whistles its got there or what the Wifi can do.

Is that thing running a customized version of Android? The icons, the fonts, and general look and feel seems oddly familiar.

It's just a pity it's switching supply. Real transformers (like they used in the previous models) last 5,000 years. With these switching turds you have to be lucky to get 5. Also, don't know why they rely on just the adhesive for the switching components to make contact with the heat sink. After a couple of years, when the glues dries out, they will be just 'flapping in the breeze' without cooling. Even I'm a R&S fanboy (their scopes are absolutely amazing), I don't get the vibe with this supply. We should buy the HMP-models while they're still available...

Could someone discharge a battery cell with this device ? Is there the capability of a negative current ? Thanks !

Hmmm will be nice to have on the bench :D

There's a lot of computing power in what is essentially a variable voltage supply. An Freescale i.MX6 1.2 GHz ARM Cortex-A9 processor (not sure which model, could even be multi-core), 512 MB of DDR3 RAM and 4 GB of flash storage. I bet this thing runs some form of Linux on it. That would explain why it takes quite a while to boot. That PIC32 is an 32-bit MIPS MCU and there's two of them by the looks of it, one on each two channel module.

Well I do love a coincidence. I was watching this exact video on youtube when I got an email from Element 14 telling me that I had won one of these power supplies in a competition they ran a few months back. Due to Covid lockdown shipping to me was delayed, but it turned up tonight, Packaging looked as though it had been on the loosing end of an All Black ruck ( You know that look when we have beaten the Aussies yet again :-) ), but the power supply is in mint condition and truely a thing of beauty. 4 channels of DC power supply niceness.

@27:22 try pushing the knob to see it it jumps digits.

I would've left the screen protector on. It would be really annoying to get the display all scratched up on such an expensive piece of equipment.

Do a detailed PFC explanation pls! I have so many units here with "active" PFC in supply and they say "never connect the outputs in parallel with PFC on!" or they will die !?

"A bit of a premium". 5000 dollars almost for a power supply ? I wait a few months until they are available in special bundle like the scopes. But wait... Haven't got one of those, still too expensive 😀

Do you know why it is taking so long to boot? Self-tests? Booting a bloated OS?

Power supplies, you can never have too many of 'em, even if you wind them yourself!

£4200!!!!! I think the most expensive board I've had on my Rigol DP832 was a measly £1800. Love that touchscreen, really well laid out.

The GUI should need some polishing still... Maybe just the video, but in the menu, the white text over the greenish-blue background seems badly visible. A little bit more spacing between the buttons on the numpad would make it nicer... Please add colors. Number/arrow/button groups could have a different color. The number input screen really shoud have remain shown while turning the knob. It looks very distracting that it disapperas. Maybe there should be an "123" or so icon near every number, and if you press that, it will bring the numpad up, if you just press the value, you could select it for changing just via the encoder. Maybe the numpad should be made smaller to fit all the channel info beside it (for the channel you are editing, to see what other values changing, current, power, CV/CC...) I would add an Apply and an OK button on the numpad screen, the Apply would set but keep the window open to allow another setting, the latter would set and dismiss the screen (as used to on computers). It's not a software thing, but would be nice to see some more hardware controls. A cursor left/right near the encoder would be a bare minimum, and output on/off for every channel (keeping the existing synchronized on/off button).

"twice the power, twice the voltage..... four times the price?" i was so hoping for that remark :D

You know you watched enough Dave when you predict the first sentence before clicking the video.

You can no longer (for a number of years now) have a label when broken, voids the warrantee, in the USA. You’re allowed to open your own equipment and still have the warrantee. Even if it’s imported, and has the sticker, it’s not valid here.

A 32bit system with its own operation system in 4GB emmc with wireless communication touch screen plus nice look having many other special features.Its main job and its name is called as a power supply.

This would be perfect for working on amplifiers..

Where's that 327 circuit again, need to whip up some more boards.

"QUICK! Dave needs our latest and greatest!"

Put your mouse over the timestamp, close your eyes and click ^^ 5:23

I want one too! Ok, a much smaller one would also be enough for me.

Power Supply review without Ripple Voltage measuring?!