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 Forum index » DIY Hardware and Software » YuSynth
Yusynth Steiner Filter stomp box - 50Hz Hum issue
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lebarde



Joined: Oct 03, 2017
Posts: 4
Location: Switzerland

PostPosted: Tue Feb 06, 2018 1:39 pm    Post subject: Yusynth Steiner Filter stomp box - 50Hz Hum issue Reply with quote  Mark this post and the followings unread

Hey Guys,

I've built a unit featuring two parallel Steiner filters provided by Yves.
Just tested the thing today and it sounds amazing !!
I wanted something like this for years and I so happy I did it, being able to run anything through a nice analog filter in stereo.
I know some products like this exist, but not so much actually.

I'm just having an issue having a hum noise at the usual 50Hz. It's not crazy loud but still too loud. I'm wondering if it comes from the power supply itself not being good enough, I choose something quite decent though.
Would anyone here be kind enough to help me trouble shoot that ?


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Blue Hell
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Joined: Apr 03, 2004
Posts: 22514
Location: The Netherlands, Enschede
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PostPosted: Tue Feb 06, 2018 4:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'd first try to move the power supply out of the box for a test to see if it is that.

Nice box BTW:-)

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g.gabba



Joined: Nov 29, 2008
Posts: 368
Location: berlin
Audio files: 23

PostPosted: Tue Feb 06, 2018 11:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

nice box!
some guys on the other side of the wormhole had recently a similar discussion
may it worth a look?
http://www.muffwiggler.com/forum/topic-194002.html&sid=90284ee924628362a5a38e6cdb270963

and of course moving the power supply out of the box would be my first test to

Last edited by g.gabba on Thu Feb 08, 2018 2:21 am; edited 2 times in total
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lebarde



Joined: Oct 03, 2017
Posts: 4
Location: Switzerland

PostPosted: Wed Feb 07, 2018 4:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for your answers.
Good call trying to put the power supply out of the box.
Just tried, it does improve the issue by about 10db already.
I was keen having the DC adapter in the box though.

Cheers for the other topic link, will try what they did there and report.
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wackelpeter



Joined: May 05, 2013
Posts: 425
Location: germany
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PostPosted: Fri Feb 09, 2018 3:07 am    Post subject: Reply with quote  Mark this post and the followings unread

For your own safety take the PSU out of the box. It's absolutely dangerous with your metallic front plate and having it not grounded with mains earth.

What i also see as very critical/crucial for your safety is that there seems to be no strain relief on the mains cable, means if you pull hard enough perhaps the mains wire get loose and come in contact with the metal case.
Also a fusing the primary side should be included.

Really, for your own safety reasons consider to re-arrange that part.

edit: okay see your using a socket for your mains... this would make the strain relief unnecessary.

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yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France

PostPosted: Thu Feb 15, 2018 12:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

You would also gain to use shielded wire for the audio connections (inputs and outputs and also for the connection to the rotary switch.
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