Easel grounding tips

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Nicken85
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Easel grounding tips

Post by Nicken85 » Sat Oct 05, 2019 10:17 am

Hey!

Sorry for n00b question maybe but I was wondering if I can get rid of the ground in any other way than plugging a banana in the ground jack and putting the other end on my body? :)

Thanks!

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fonik
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Post by fonik » Sat Oct 05, 2019 12:18 pm

I do not have an Easel nor do I know about the actual PSU used, however, for those situations I built myself a mains-plug with modified with a banana socket connected to the mains safety earth only.
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ArguZ
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Post by ArguZ » Sat Oct 05, 2019 1:35 pm

What he means is that he want to make a magic potential without a proper ground.
Which is impossible, sadly :)
Th capacitance keyboard needs exactly that, a body to case connection.
Cet a 5$ anti static wrist band from radio shack or Ali Express.
That is what i use...

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fonik
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Post by fonik » Sat Oct 05, 2019 4:02 pm

Really?
For the TKB we use an external PSU with mains earth connected to 0V/COM of the TKB. This is the approach that should work for the Music Easel as well:
viewtopic.php?t=201326
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ArguZ
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Post by ArguZ » Sun Oct 06, 2019 2:58 am

I am almost sure he speaks of the the phenomena of not getting the capacity keyboard to act properly as there is the misconception that one needs to ground the Easel to something, which is wrong.
The black banana is there to provide a proper 0V reference to anything interfere with its CV inputs...
External keyboards, or modules or the human body.
So some people put a banana cable in their pants, and that is the way it works :)



If it is about actual ground, my apologies, then one needs a proper three pin medical grade wall wart which does the job just fine.

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Post by fonik » Sun Oct 06, 2019 3:11 am

To be honest, I would be the last person to claim deep knowledge of the Easel and how it works. Nonetheless, I am always a friend of having audio gear properly grounded.
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Nicken85
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Post by Nicken85 » Sun Oct 06, 2019 5:54 am

ArguZ wrote:I am almost sure he speaks of the the phenomena of not getting the capacity keyboard to act properly as there is the misconception that one needs to ground the Easel to something, which is wrong.
This is it. But I’m still confused about why some people need it and some people don’t? Is it because of the wall outlet?

Thanks for the answers everyone

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Post by christie » Mon Oct 07, 2019 7:46 pm

In my case it's dimmer switches. I only have a few circuits in the house without any. The behavior of my 218e is totally different depending on whether a dimmer switch is on, and on the same circuit as the Easel or off/on a clean circuit.

I was going to say with the lights on and off it's like night and day, but stopped myself.

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Post by Nicken85 » Tue Oct 08, 2019 3:15 pm

Aaah ok so it has to do with the circuits and not the actual wall outlet? Sorry for beginner questions but have never needed to deal with ground in my entire life :)

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Post by ArguZ » Tue Oct 08, 2019 3:44 pm

It really has nothing to do with "Ground" as in earth in the wall socket.
Look at your wall wart, it probably does not have a third lead anyway.
But the capacitance needs a reference , your body electric to null itself against.
So, if you play in true 70s fashion butt naked and the Easel has a grounded wall wart, it will work.
But most people i had to interact with would wear some sort of cloth, especially shoes and that negates the ground contact.
Ergo, a direct connection to the case is needed and the 218 will perform perfectly fine
Last edited by ArguZ on Thu Oct 10, 2019 4:51 pm, edited 1 time in total.

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Post by captnapalm » Tue Oct 08, 2019 4:15 pm

ArguZ wrote:It really has nothing to do with "Ground" as in earth in the wall socket.
Look at your wall wart, it probably does not have a third lead anyway.
But the capacitance needs a reference , your body electric to null itself against.
So, if you play in true 70s fashion but naked and the Easel has a grounded wall wart, it will work.
But most people i had to interact with would wear some sort of cloth, especially shoes and that negates the ground contact.
Ergo, a direct connection to the case is needed and the 218 will perform perfectly fine
I'd still like to know why my original 70s 218 never had this issue, and why the 218R doesn't seem to either...

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ArguZ
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Post by ArguZ » Wed Oct 09, 2019 1:47 am

You can borrow me your original 70s one and i can do some measurements ;)

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Post by papz » Wed Oct 09, 2019 4:52 am

It's because the original 70s one is gold plated. :spin:
Finest EMS gear service and Music Easel/208 goodies

I'm not a synths dealer and I'm not aware of an inexpensive Synthi secret market, please don't ask me if I know one for sale.
I don't offer support of any kind to people attempting to build clones of EMS equipment.

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Post by Nicken85 » Thu Oct 10, 2019 3:46 pm

ArguZ wrote:It really has nothing to do with "Ground" as in earth in the wall socket.
Look at your wall wart, it probably does not have a third lead anyway.
But the capacitance needs a reference , your body electric to null itself against.
So, if you play in true 70s fashion but naked and the Easel has a grounded wall wart, it will work.
But most people i had to interact with would wear some sort of cloth, especially shoes and that negates the ground contact.
Ergo, a direct connection to the case is needed and the 218 will perform perfectly fine
Ok I think I get it now. Will try to put some clothes and shoes on ;) thanks!

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Post by cleaninglady » Sun Oct 20, 2019 6:57 am

I sometimes get a different response from the 218e keyboard attached to my DIY 208r Easel. I seem to think even humidity could be a factor.

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Post by ArguZ » Sun Oct 20, 2019 12:43 pm

no
and not voodoo either
or magnetic sun storms

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