I got banned, it was too hardcore.

LOLOLOLOLOLOL, oh man.....

You should make a PC themed porn called ''Motherboards Get RAMmed''.

EEVblog uhh you gotta dispute this. Transformer metal is always soft core iron for better magnetic flux 😲

It's there. Just filter by crazy Austrian.

Also true of guitar amp transformers

Same goes for the audio transformer.

Yeah, likely for stacking/physical compatibility

I guess the spare volume also allows for future feature growth without having to redesign the case & chassis.

To justify the ridiculous price for the poorly engineered product.

Yes, that's it. I used to work for a while for R&S in Vimperk and you would be surprised how much empty space is in some of the instruments (I remember some 5.5 digit DMM that was 95% free). But the form factor is kept the same for stacking.

a bit of space is not bad per se either. lots of room for air to take heat from other parts away, and lots of separation between different parts of the circuit so they don't interfere as easily.... this is not designed to be a particularly portable device....so no need to compact it all down.

Yes, that is what it is for. The relay will activate after a few seconds.

Oww. I knew somebody would beat me to it. lol The NTC is likely in parallel with the relay contacts, so yep, inrush soft-start.

And maybe for an overcurrent trip as well, although you'd think they would have to rely on the secondary side relays and transistors anyway for that. I guess they could be doing remote power-on as well, but that would leave the NTC roasting hot while the power switch is on.

Yep soft start

Evertime a r&s product is opened I lose a little more respect for the brand

@@seeker4430 yeah...you have to know it

It was an hour edit, so I thought better to split into two videos.

Maybe he could use one of his couch feet. :-) Seriously though, I don't know why they don't do it at the factory. Or... use a bolt that's the right length and doesn't stick out 1".

Agreed. The quality looks superb with this one notable exception.

Blegggh. Whenever I see inappropriate use of comic sans I really would like to interrogate the person who chose to use it to ask why? Why do you think it's a good idea to use this shitty looking unprofessional joke of a font? Where's your self-respect? I still get flashbacks from the Higgs boson presentation...

there's no vibration resistance, no consideration for the case flex,-it sits on a bench-why bother...

​@@timothygodfrey4950 It has to be shipped at some point which can be a fairly aggressive process even if it's handled carefully. Long or heavy components can experience a lot more mechanical wear from such forces than other components and capacitors in particular have a tendency to fail due to work hardening of the aluminum tabs which internally connect the foil windings to the pins. Likewise the unit may need to be moved into and out of storage, or it could be mounted on a cart and moved frequently from room to room. These aren't even theoretical usage cases, I've seen both these situations very frequently with lab power supplies. Components freely vibrating like that can also cause solder joints to crack, particularly if there is a large amount of PCB flex like there is here where the PCBs hang unsecured within the enclosure. As for case flex, he demonstrated in the video that just putting a piece of equipment on top of this one could cause the case to form a shorted single winding. Mechanical considerations do matter.

It's not lacquer, it's powder coated. I doubt it would ever short out unless someone intentionally caused it.

@@innopriest Hm I'm not sure why my mind went to lacquer. Powder coatings are pretty tough so you might be right!

You'd be surprised. I used to vibration sweep test PCB's and you'd be shocked at the resonant modes of boards, mounts and components. There are commercial standards for transport vibration by various transport modes like trucks and planes.

No comment...

The number 24?

The devil is in the chemical detail. You can't tell by just looks.

The Defpom's Repair Channel The glue also looks a lot like the glue used everywhere else without any problems. Like PC power supplies for example

No, you are wrong, it does not short out if you stack another unit because the weight points are on the outside tabs. To hit the bolt you have to press directly in the center, and press fairly hard.

EEVblog yea that’s fair enough. But would you not agree that it’s a poor design/ was overlooked? If it did short out what would be the outcome? Would it damage the psu?

@@EEVblog the issue is that the shorting issue depends on where you put the force. Given that in a lot of cases random devices get stacked on top of each other it does not really matter where the weight points are on any given manufacturers device. They simply might have overlooked the issue.

They should have a rubber pad or something on top of the screw. Tiny price for a bit of peace of mind.

BavarianMonkey yep but he can’t say anything bad about it as he got it for “free”

It's pretty funny. Similar to the whole ESP8266 or especially ESP32 thing where the WiFi chip is far faster than the application processor.

I had a serious WTF at that... an FPGA AND a grunty processor - just for ethernet, usb and wifi ? WTF ?

@Proscriptus that still doesnt warrant the processing power in use. You could do such things on an 8 bit micro just as easily, with fuse protection to prevent the code being read out

@@jaycee1980 That networking module probably has an RTOS and a networking stack and all that. It's also probably standardized across many product lines so it has to be flexible. Running the power supply itself is pretty simple in comparison.

Think industrial! Re-use in different product families for decades. Delivery of all components for years. Thats what they come from.

What about soldering of red banana jack at 11:33 ?

Interesting. Links?

@@mr_gerber www.npr.org/sections/thetwo-way/2018/04/11/601582169/warranty-void-if-removed-as-it-turns-out-feds-say-those-warnings-are-illegal

I'm sure they are reading comments. A cap would do the job nicely.

@@EEVblog Or just small piece of insulation sheet (the stuff used for double-insulated metal enclosures) on the shell. Either way it's a few pennies and a few seconds a unit.

@@hwfanatic Instead of Air, a dielectric?

That's what the fan is for

It's supported by the heatsink relatively close to the front.

There is no shortage risk, it's fairly stiff. The risk in the flex and vibration induced issues during transit.

I would choose that design instead of the "whole motherboard" one. Easier servicing and that cooling is well thought out. This is not a mobile device, maybe 7-8cm of PCB hangs out, without any heavy component. Should be more rigid than the "big board" version which doesn't have screws at every 8cm too...

Gábor Móczik I used to design mobile test racks that got wheeled around on a factory floor 24/7. Even with gigantic rubber wheels you'd be surprised at the vibrational modes you can get in components and boards and mounts.

The extra labor is ZERO. The glass fiber sleeving is always used on toroids on taps going outside of the winding. Someone just got clever and specified them to be cut bit longer.

A switching pre-regulator is going to beat the pants of a pure linear design in efficiency, except maybe at a small window of optimum voltage for the linear.

Indeed!

These have 50/60Hz transformer, DC/DC switching supply and finally linear regulation. DC/DC is tracking linear regulation. I'm not commenting differences between brands.

cannesahs the AC/DC is not SMPS though

Try go build and sell one with this same functionality and you'll find out.