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Snaper
Joined: Feb 28, 2014
Posts: 217
Location: Hungary
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 Posted: Wed Mar 04, 2015 8:14 pm Post subject:
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| Thelonious wrote: | Ok thanks snaper.
I finish my layout.
I made 2 versions, one "normal" and one with hoyager's mods.
But I have some questions.
For the "normal" version :
What is the value of C4.1 ?
Switch A1 and A2 are connect to ground, and A3 without connection ?
The DPDT is ON-ON (B1 is Lowpass input, and B3 is Highpass input) ?
For the hoyager version :
Don't understand this : "use an 8.2k resistor from the res3/out to the lug 3 of res pot (as per ms20) " ? (It's a bit confused)
And this : "add a 47k resistor from the hi pass input (gnd end of C4) to gnd ." ? (If I understand, he want to put a 47k in serie with C4 before to go to ground).
I can send you my layouts if you want.
Thanks |
What schemo are you using?
By the way, Ive ended up etching a schmitz PCB when I was building this  |
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Thelonious
Joined: Mar 03, 2015
Posts: 5
Location: France
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| Posted: Fri Mar 06, 2015 2:36 pm Post subject:
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I used the Rene schmitz' shema with Fazh0r layout for the LP/HP switch, this one :
http://www.schmitzbits.de/ms20.html
And I made a version with the hoyager' mods.
Just what the value of C4.1 on Fazhor layout connected to SWB3, 1nF ?
And end of C4, are connected to ground and SWA1 ? |
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Snaper
Joined: Feb 28, 2014
Posts: 217
Location: Hungary
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Thelonious
Joined: Mar 03, 2015
Posts: 5
Location: France
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| Posted: Mon May 18, 2015 2:07 am Post subject:
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I made first the version of hoyager. Very bad mod, sound very crappy, don't follow it.
So I made the "original" version with LP/HP, works very well. I would like the resonance oscillates.
What can I change to have more resonance? |
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Thelonious
Joined: Mar 03, 2015
Posts: 5
Location: France
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| Posted: Tue May 19, 2015 2:42 pm Post subject:
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It's ok, I found the solution, that was writes in a post above
That was just a problem with the input level. With a low input signal, the resonance oscillates perfectly. |
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isak
Joined: Dec 13, 2009
Posts: 847
Location: Israel
Audio files: 18
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| Posted: Tue May 19, 2015 3:06 pm Post subject:
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Hi Thelonious.
| Quote: | | So I made the "original" version with LP/HP, works very well. I would like the resonance oscillates. |
can you please share the board of the LP/HP?
cheers,
Isak E.
_________________
http://www.myspace.com/mgmtrance |
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Snaper
Joined: Feb 28, 2014
Posts: 217
Location: Hungary
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| Posted: Tue May 19, 2015 7:18 pm Post subject:
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| isak wrote: | Hi Thelonious.
| Quote: | | So I made the "original" version with LP/HP, works very well. I would like the resonance oscillates. |
can you please share the board of the LP/HP?
cheers,
Isak E. |
Im interested too;) |
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mfc83
Joined: May 21, 2015
Posts: 1
Location: Berlin
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Posted: Thu May 21, 2015 10:20 pm Post subject:
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| Snaper wrote: | | isak wrote: | Hi Thelonious.
| Quote: | | So I made the "original" version with LP/HP, works very well. I would like the resonance oscillates. |
can you please share the board of the LP/HP?
cheers,
Isak E. |
Im interested too;) |
Another interested party here. Would love to build this! |
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bamboombaps
Joined: Oct 23, 2015
Posts: 66
Location: Glasgow
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| Posted: Sat Nov 21, 2015 2:42 am Post subject:
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| me three |
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abelovesfun
Joined: Dec 17, 2012
Posts: 40
Location: Portland, OR
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| Posted: Mon Oct 31, 2016 2:57 pm Post subject:
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Here is my update of the Ms.20 with HP and LP.
http://aisynthesis.com/wp-content/uploads/2016/10/MS20.pdf
Almost ready for production, I have the following to troubleshoot:
1. Re-introduce a 10k input resistor to the input, and a 220r to ground, as in the Rene circuit. At overly hot levels, the filter distorts and acts irregular.
2. Should C10 be elctrolytic with the + facing "output?" Currently the filter "thumps" out when switching between hp and lp sometimes, requiring the cutoff to change before it kicks back in.
3. Confirmation of orientation of the two BC558s - I think this is not quite right...
_________________
Experimental and modular music at: https://soundcloud.com/she-suburban-heroin-electronics
I make Eurorack DIY Kits (pcb and or panels also available): aisynthesis.com |
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mercury8
Joined: Nov 25, 2018
Posts: 14
Location: grand rapids ohio
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| Posted: Fri Dec 14, 2018 2:45 pm Post subject:
ms-200 cuttoff |
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| anyone experience the frequency not cutting off the signal all the way when its turned all the way down. I still get sound coming through. with freq turned down and resonance at about 40% the vco signal is consistently coming through and the filter is changing the pitch. weird |
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emiz
Joined: May 16, 2018
Posts: 20
Location: germany
Audio files: 1
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Bobby Zincone
Joined: Oct 01, 2020
Posts: 3
Location: Budapest
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| Posted: Fri Oct 02, 2020 2:25 am Post subject:
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| gila_crisis wrote: | | here you'll find my layout for Takeda's MS20 VCF. I added a charge pump to use it as a stompbox with a standard 9VDC power supplies (also with -/+9V instead of +/-15V the filter works really well! but you can omit the charge pump part of course). |
Thanks a lot for this! I used this layout for my build, and it turned out fantastic, beyond words.
The only thing I changed is the wiring of the Frequency and Resonance pots. For me, the reversed wiring (low to high is clockwise) is more intuitive. The Frequency gain I left unchanged. |
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