Author Topic: EEVblog 1402 - Rohde & Schwarz NGA100 PSU Teardown + GIVEAWAY (Read 20058 times)

yektaakdag · « **Reply #50 on:** June 25, 2021, 06:00:00 am »

I am in

HKJ · « **Reply #51 on:** June 25, 2021, 06:16:23 am »

With that kind of overshot it may not be possible to directly (i.e. without a series resistor) test small leds with it. A test with 10-20mA constant current, instead of 1A would ave been interesting.

jusaca · « **Reply #52 on:** June 25, 2021, 06:17:22 am »

I just realized two days ago that my DIY supply has serious problems with overshoot when loaded by PWM impulses. So yes, I would be really glad to have a decent supply that just works. Nevertheless, I have to figure out the problem with my own PSU...

kripton2035 · « **Reply #53 on:** June 25, 2021, 06:18:20 am »

not sure if the giveaway is on the other thread may be so I post here too. thanks Dave (and R&S) !

piranha32 · « **Reply #54 on:** June 25, 2021, 06:24:20 am »

This 100v power supply is sweeet

s8548a · « **Reply #55 on:** June 25, 2021, 07:05:49 am »

Nice power supply and thanks for the tear-down.

why r&s selected the $8 wifi module when there are popular low cost modules available? due to the Atmel eco system?

Custom · « **Reply #56 on:** June 25, 2021, 07:07:07 am »

I definitely need this power supply in my small but growing electronics lab. Its a beautifully designed PSU and has decent specs as well. Moving from my current computer PSU hack job to a proper benchtop PSU would make doing anything with power sooo much easier, and safer for my little circuits. The supply would be well used and certainly be greatly appreciated here. Thanks for doing this giveaway!!!!

Brexei · « **Reply #57 on:** June 25, 2021, 07:08:43 am »

I would love to have one of these PSUs. I am building my own home lab and currently lack any proper power supply.

HattedSquirrel · « **Reply #58 on:** June 25, 2021, 07:51:28 am »

How are the power tarnsistors connected to the heatsink? Do they solely reley on the springyness of the component leads? I see no screw and no clamp. And heat conductive glue doesn't relly work with silcone sheets...

On the constant current issue: Yeah, thats a big problem. It always has been. In my last workplace we destroyed several 10th of tousands of dollars of chips just because some Hameg/R&S power supply was overshooting or otherwise misbehaving. Extremly annoying!

Also, at least for the HMP4040, from time to time it misses SCPI commands, so you always have to read them back and check. The virtual com port those things provide for communication disappears on every major windows update and you have to reenable it in the driver settings... (Try explaining to the IT staff why you need admin rights on that computer because of some power supply you want to use.)

Yeah... those things are nice spec wise but the usability is just such a pain. I found myself biting the table out of frustration many times. It's really sad and it has been so for years. The R&S RF gear is really nice and spot on, but what they bought in from Hameg - no improvement whatsoever since they aquired the company. Really doesn't add to well to their reputation.

PS: I would still take it for my home lab. Now that I know all their bugs and can circumvent them... ;-)

_michael_ · « **Reply #59 on:** June 25, 2021, 09:08:43 am »

Wow this is amazing, as a student I would like to have one of these

For a student these amazing utilities would be to expensive, so I hope I would win one of these. although I haven't been a member for a long time, I follow you on YouTube for a while🙏

rbleth51 · « **Reply #60 on:** June 25, 2021, 09:14:44 am »

One of these would really help in my lab!

tubularnut · « **Reply #61 on:** June 25, 2021, 09:51:03 am »

I'm in

vfxsoup · « **Reply #62 on:** June 25, 2021, 10:05:29 am »

Yes please! I'd love one of these bad boys if there's even a 0.001% chance! I need a 2 channel PSU for audio amplifier testing (my Riden is only single channel so I'm relying on an unregulated audio PSU of my own design). Thanks.

pstimpel · « **Reply #63 on:** June 25, 2021, 10:22:33 am »

Oh, yes please. Could use one of those, and it -probably- wants to travel back to Germany, back home. I'm in!

plantgrower · « **Reply #64 on:** June 25, 2021, 10:32:42 am »

I could do with a higher voltage power supply!

ArnoldJRimmer · « **Reply #65 on:** June 25, 2021, 10:53:45 am »

I'm in.

info · « **Reply #66 on:** June 25, 2021, 12:19:31 pm »

I'd love to have one. I'm in

leighcorrigall · « **Reply #67 on:** June 25, 2021, 12:20:52 pm »

Please sign me up.

Thank you.

Taviman · « **Reply #68 on:** June 25, 2021, 12:26:04 pm »

This is my chance! I couldn't afford to buy R&S but I know you will choose wisely the poor guy 🙂.
What is that EasyRamp thing? I was expecting that to regulate how sharp the ramp time. Didn't expect it to overshoot like that

Marsman1 · « **Reply #69 on:** June 25, 2021, 12:26:32 pm »

Not a big poster but always a fan. I'm in.

Muessigb · « **Reply #70 on:** June 25, 2021, 01:02:10 pm »

Quote from: s8548a on June 25, 2021, 07:05:49 am

why r&s selected the $8 wifi module when there are popular low cost modules available? due to the Atmel eco system?

First, I'm glad they're using quality components and second, this WiFi module is also developed and manufactured by Microchip (formerly Atmel).
This makes them a good match. Their website also claims it works well with Microchip's high performance ARM series.
They also claim that it works well with an RTOS, and R&S is known to like using FreeRTOS in their oscilloscopes also running on Atmel processors.

h3ndr1k · « **Reply #71 on:** June 25, 2021, 02:17:05 pm »

although i'mnot a very active member i do love your video's.
would love to finaly have a powersupply!

Smith · « **Reply #72 on:** June 25, 2021, 02:59:21 pm »

Would be awesome to win such a power supply. The dual 100V output would be great for testing amplifier outputs without continuously blowing fuses

rghisi · « **Reply #73 on:** June 25, 2021, 03:00:22 pm »

I've been watching eevblog for a thousand years now and already learned tons from it.

Having a PS like that one would be awesome, even with its quirks. Sign me in, please

dwd2112 · « **Reply #74 on:** June 25, 2021, 04:12:11 pm »

Thanks for this, Dave! I hope this qualifies as an entry. Good luck, all!


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Author Topic: EEVblog 1402 - Rohde & Schwarz NGA100 PSU Teardown + GIVEAWAY (Read 20058 times)

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