#603

Thanks @maztik8r, that looks promising indeed! Has anyone tried the Loci stand for two 3U cases yet?

1 Like
#604

Does anyone have an Erica synths Pico skiff? Wondering about the true depth of the case.

#605

Any suggestions on 9u 84hp cases? Would prefer aluminum.

This looks awesome, never seen this mentioned: https://m.yoycart.com/Product/571294327829

But yeah I can’t afford this, specially with the customs from China.

2 Likes
#606

wow, that’s awesome, didn’t know @MengQiMusic did cases!

1 Like
#607

ArkSine does a 9U 84HP option, and you can request pretty much your own setup, so although it shows 2x9U in the pictures the otherside can be just a lid. Not aluminium, but pretty sturdy looking.

1 Like
#608

This is so beutiful that I am thinking of letting go of my 84hp restriction…

1 Like
#609

I bought an amp stand (a stand familiar with this one: https://www.sweetwater.com/store/detail/RS6000--on-stage-stands-rs6000-folding-tiltback-amp-stand-large-120lbs-max). I sawed the bottom stands off a bit to make it more suitable with the case. Works and look great (older picture that I think has been uploaded in another thread already. Sorry if that’s so):

017E00B5-7FE9-420A-A5F1-8691F19BD1F8
017E00B5-7FE9-420A-A5F1-8691F19BD1F8.jpeg2965×2214 1.49 MB

3 Likes
#610

I was going to suggest Eastwick cases, but didn’t as they only do 104HP. They are pretty light for what they are though, and wonderfully configurable. They even supply covers, and for their 6U case a great carrying option.

2 Likes
#611

Hi guys,

I am worried about my doepfer A-100 case (A-100BS2-P9 PSU3), because when I touched it yesterday I got two small electric shocks from the metal on it? Why is that?

By the way, why would they use metal on the case?
I don’t feel very safe like this and I am thinking about buying a new case altogether.

What do you think?

Eurorack: discussion, advice, learning, questions
#612

Not an expert, but I never got any electrical shocks from any case… and I’ve had some really dodgy DIY’ed ones. So that does not sound good to me.
IIRC Doepfer should have the metal parts of their cases wired to protective earth, at least that was recommended in their DIY PSU isntallation guide.

#613

I keep my setup covered by a blanket, could be that I got some small electrostatic shocks because of that. After that I played for a couple of hours and dis not get any more shocks

#614

It’s just static electricity. Rub your hand on carpet and touch the case again :wink:
The case is grounded, so it’s the same effect as when you’re charged up and touch the water tap.

1 Like
#615

It’s kind of just static electricity.
Most cases and rails aren’t properly chassis bonded or grounded. And module panels are definitely not bonded.
Parasitic capacitance between the case and power systems can cause the case or panels to charge up, again and again. So unlike many static shocks this is a shock or a tingle which can occur over and over without shuffling your feet on the carpet, etc.
As a proof: use a multimeter to take a current measurement between your outlet’s ground and a module panel.

#616

Yeah, aluminum oxide is a pretty good insulator. So I can imagine the anodized panel electrically floating, even if it visually seems to be connected to ground.

#617

Just bought a multimeter, what do I need to do exactly? Doepfer suggested I connect a pin from the mains inlet to a screw on the panel and see if I measure any ohms…by the way, am I at risk or can I keep on playing?

#618

Is there a way to insulate it further?

#619

I am suggesting that there may be a non-zero voltage potential between your case and ground. Or between your case and your body. You may have to measure in A/C mode. You are probably in a low humidity environment and the case has been charged up via stray capacitance. The amount of charge stored is probably very small, but I cannot guarantee there isn’t a more serious (i.e. dangerous) fault in your PSU.

It looks like the PSU3 uses Meanwell IRM units which are marked with the “nested squares” icon of isolated supplies. I can’t say whether this isolation is maintained by Doepfer’s PCB design, but these isolated supplies are a common occurrence in eurorack and provide no electrical path to ground. So any static charge will linger until you give it another path to lower potential, like through your body.

Even a well-grounded and -bonded case can “shock” you… in those instances, you are providing the charge. Static is pretty harmless to healthy humans, but ESD is a real threat to poorly-designed or poorly-handled electronics.

#620

Doepfer said: As a rule all conductive parts of an A-100 case are directly connected to earth of the mains connector. Please check if the mains cable is OK (especially the earth wire), if a 3-wire mains cable is used (not only 2 wires) and if the earth signal is present at the wall outlet or multiple socket (provided that a multiple socket is used).

What is ESD? You are scaring me now :frowning:

#621

ESD = electrostatic discharge. AKA getting “zapped” by static electricity… or lightning :grin:

I’ve killed two computer keyboards and three mice with it, and rebooted my spouse’s computer once without even touching it. But so far, my electronic music gear has been pretty safe. I tend to take a little extra care though.

1 Like
#622

Here we are talking bout real danger (death?) it seems. What precautions do you take?