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ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

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tverscho
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ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by tverscho » Fri Nov 29, 2019 10:10 am

Hi, my name is Tom, and I’m the guy behind ThreeTom Modular Synthesizers, a small Eurorack business based in Belgium. The past few months I've been developing a rather unique take on a dual VCF module. As I'm getting ready to release, I thought I'd make some noise about it here :

Steve's MS-22

A dual voltage controlled filter (inspired upon the classic Korg MS-20 OTA design) with an innovative modulation matrix and one of the highest function-to-hp ratios in the land of Eurorack. This module was inspired by many pleasant chats with tech journalist Steve O’Hear and is currently being prepared for release. Have a look below at the pictures, demos, specifications and block schematic!

Image

Please note that the final units will have black knobs for all controls!

Specifications
General features
  • Dual VCF inspired by the Korg MS-20 OTA filter
  • Low-pass (12dB) into high-pass (6dB) configuration
  • Innovative modulation matrix allows CV control over all parameters
  • Cut-off frequencies can be linked, resulting in a band pass filter with controlable bandwidth
  • Bipolar monitoring LEDS for the LP, HP, resonance and gain CV signals
  • One of the best functionality-to-size ratios in Eurorack with a width of 4 HP and a depth of 45 mm
Connections
  • Filter input
  • Filter output
  • Frequency CV input (FCV)
  • Auxiliary CV input (ACV)
Controls
  • LP cut-off frequency (“frequency”)
  • HP cut-off frequency / BP bandwidth (“spread”)
  • Resonance : from mild to screamy
  • Gain : from warm to asymmetrical saturation
  • LP Frequency CV (FCV) attenuator
  • Auxiliary CV (ACV) attenuator
  • LP-HP link switch : 0%, 50% or 100%
  • Modulation Matrix switches, routing ACV to HP cut-off / spread, Gain and resonance : +ACV, off, or -ACV (inverted)
  • Calibration trimmers for the HP and LP filter are available from the side of the module.
Modulation
  • Designed to work with unipolar +5V or bipolar +-5V modulation sources
  • Will also take unipolar and bipolar 8 and 10V modulation signals, but this results in a smaller usable range on the ACV and FCV attenuators
  • Low frequency and audio rate modulation of all parameters
  • Bipolar monitoring LEDs (green: positive, red: negative) for all CV destinations (LP cut-off, HP cut-off / spread, resonance, gain)
Construction
  • 4 HP wide
  • 45 mm deep (skiff friendly)
  • High quality aluminum knobs with grippy surface
  • 2 mm thick matte black front panel with white and metallic print
  • A tasty 4-layer PCB sandwich, containing 350+ components
  • Recessed power connector, avoids your power cable from adding to the module depth
  • Protection
  • Reverse power protection
  • Buffered high impedance inputs
  • Output is protected by a 1K output resistor
Power consumption
  • +12V : 100mA max
  • -12V : 100mA max

Demo videos

[video][/video]

[video][/video]

[video][/video]

[video][/video]


Audio demo
Graciously recorded by Mr. Steve O'Hear

https://soundcloud.com/threetom-modular ... -ms-22-dub
More can be found here : https://soundcloud.com/threetom-modular ... udio-demos

Availability
If no cataclysmic events occur, I hope to release a batch of 10 units half December, price TBA

More info on http://www.threetom.com

Please feel free to ask any question either here or over e-mail.

Regards,
Tom
Last edited by tverscho on Tue Dec 03, 2019 7:59 am, edited 1 time in total.

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Post by soh » Fri Nov 29, 2019 1:09 pm

Thanks for the mention, Tom. I can confirm it is a great little filter (I bought the first one).

- Steve
https://techcrunch.com/2019/09/28/meet- ... f-modular/

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Tonescape
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Post by Tonescape » Sat Nov 30, 2019 3:27 am

That modulation matrix is a great idea, well done sir!

I generally like what you have done here, will be watching this space.
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Post by tverscho » Mon Dec 02, 2019 7:22 am

Tonescape wrote:That modulation matrix is a great idea, well done sir!

I generally like what you have done here, will be watching this space.
Thanks!

So, maybe you've seen it on my website already, but here's a block schematic of the module, showing the possibilities that the modulation matrix has to offer :nana: 8-) .

Image

Image

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Post by antonins » Wed Dec 04, 2019 7:37 am

seems nice !

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Post by Paranormal Patroler » Wed Dec 04, 2019 2:12 pm

I like the design, the looks, and your general aesthetics. Nicely done!
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Post by tverscho » Fri Dec 06, 2019 6:40 am

Hi guys, thanks for the kind comments!

Check out the last awesome demo video for Steve's MS-22. In this video I'm showing what you can expect from the MS-22's resonance. Have a listen to the awesomely complex duophonic drones and pings in this video, demonstrating the MS-22's undeniable versatility! :)

This video is the last one before the MS-22's release, approximately a week from now. There will be a batch of 10 units available, price to be announced upon release.

[video][/video]

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Post by ookrsia » Fri Dec 06, 2019 2:10 pm

Cool. Keeping an eye on this.

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Post by tverscho » Fri Dec 13, 2019 4:37 am

Hi guys, I'm happy to announce that Steve's MS-22 has now officially been released.

https://www.threetom.com/news/threetom- ... ves-ms-22/

I currently have a batch of 10 units available at 225 EUR/unit + shipping :banana:

Also, if you want to dive a bit deeper into the nitty gritty of the module, have a look at it's spanking new 18-page manual 8-) : https://www.threetom.com/wp-content/upl ... -dec19.pdf

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Post by paperCUT » Fri Dec 13, 2019 6:07 am

Ordered! Cant wait 8-)

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Post by thor.lucas » Sat Dec 14, 2019 1:11 pm

Fancy seeing you here! Hi!

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Post by tverscho » Mon Dec 16, 2019 3:35 am

thor.lucas wrote:Fancy seeing you here! Hi!
Hi there Thor! :)

On a side note, the assembly guide and BOM can now be found here : https://www.threetom.com/products/steves-ms22/#MS-22_DIY

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Post by Tonescape » Mon Dec 16, 2019 5:05 am

Congrats on the release, as an aspiring circuit designer I see the amount of work that went into this.
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Re:

Post by drowld » Thu Sep 24, 2020 5:13 am

tverscho wrote:
Fri Dec 13, 2019 4:37 am
Hi guys, I'm happy to announce that Steve's MS-22 has now officially been released.

https://www.threetom.com/news/threetom- ... ves-ms-22/

I currently have a batch of 10 units available at 225 EUR/unit + shipping :banana:

Also, if you want to dive a bit deeper into the nitty gritty of the module, have a look at it's spanking new 18-page manual 8-) : https://www.threetom.com/wp-content/upl ... -dec19.pdf
Where is it currently possible to buy it ? I see it available nowhere.. :)

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by deft_bonz » Thu Sep 24, 2020 7:33 am

I'll be getting soon a matched stereo pair. Can't wait to play with them.

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Re: Re:

Post by EASYBOY » Thu Sep 24, 2020 4:30 pm

drowld wrote:
Thu Sep 24, 2020 5:13 am
tverscho wrote:
Fri Dec 13, 2019 4:37 am
Hi guys, I'm happy to announce that Steve's MS-22 has now officially been released.

https://www.threetom.com/news/threetom- ... ves-ms-22/

I currently have a batch of 10 units available at 225 EUR/unit + shipping :banana:

Also, if you want to dive a bit deeper into the nitty gritty of the module, have a look at it's spanking new 18-page manual 8-) : https://www.threetom.com/wp-content/upl ... -dec19.pdf
Where is it currently possible to buy it ? I see it available nowhere.. :)
Only on toms website

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by tverscho » Fri Sep 25, 2020 2:14 am

Hi guys, assembled modules are only available within the EU from my website.

My DIY products will be hitting two distributors in the coming weeks though :).

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by Naenyn » Fri Sep 25, 2020 2:22 am

tverscho wrote:
Fri Sep 25, 2020 2:14 am
Hi guys, assembled modules are only available within the EU from my website.

My DIY products will be hitting two distributors in the coming weeks though :).
Not shipping assembled modules to the US? I’d definitely like to try one... :hyper:
-n :ninja:

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by tverscho » Fri Sep 25, 2020 2:55 am

Naenyn wrote:
Fri Sep 25, 2020 2:22 am
Not shipping assembled modules to the US? I’d definitely like to try one... :hyper:
Sadly no, but I'm sure you can find someone within the DIY community to build you one once my kits are available locally.

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by Naenyn » Fri Sep 25, 2020 3:15 pm

tverscho wrote:
Fri Sep 25, 2020 2:55 am
Naenyn wrote:
Fri Sep 25, 2020 2:22 am
Not shipping assembled modules to the US? I’d definitely like to try one... :hyper:
Sadly no, but I'm sure you can find someone within the DIY community to build you one once my kits are available locally.
Which shops in the US will be carrying your kits?
-n :ninja:

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by zer0point » Sat Sep 26, 2020 5:04 am

tverscho wrote:
Fri Sep 25, 2020 2:14 am
My DIY products will be hitting two distributors in the coming weeks though :).
Can you reveal if full kits will be available? I was considering ordering the partial kit from your shop, but I'd hold off for a full kit. 8-) And would the SMD parts be pre-soldered? (My preference would be not - I actually quite enjoy soldering SMD.)

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by tverscho » Sun Sep 27, 2020 9:10 am

Naenyn wrote:
Fri Sep 25, 2020 3:15 pm
Which shops in the US will be carrying your kits?
Sorry, can't make any statements about that until they do. I just sent the shipment yesterday, So I'm hoping the announcement will come in a week or two.

zer0point wrote:
Sat Sep 26, 2020 5:04 am
Can you reveal if full kits will be available? I was considering ordering the partial kit from your shop, but I'd hold off for a full kit. 8-) And would the SMD parts be pre-soldered? (My preference would be not - I actually quite enjoy soldering SMD.)
There's definitely full DIY kits included (and yes, they have all SMD components pre-soldered). They'll also offer partial kits, including a bare PCB, a front panel, 6 high-quality Threetom black aluminum knobs, and 4 switches. So, in your case, I'd go for the partial kit if you want to do the SMD soldering yourself :).

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by tverscho » Sun Oct 04, 2020 12:43 am

The eagle has landed! Kits and Wiretap PCBs are now available from SynthCube :party:

https://synthcube.com/cart/threetom-modular-en

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by Naenyn » Sun Oct 04, 2020 11:31 pm

tverscho wrote:
Sun Oct 04, 2020 12:43 am
The eagle has landed! Kits and Wiretap PCBs are now available from SynthCube :party:

https://synthcube.com/cart/threetom-modular-en
Thanks for the heads-up! Picked up a kit. :goo:
-n :ninja:

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Re: ThreeTom Modular - Steve's MS-22 Dual VCF (4HP)

Post by zer0point » Mon Oct 05, 2020 3:48 am

tverscho wrote:
Sun Sep 27, 2020 9:10 am
So, in your case, I'd go for the partial kit if you want to do the SMD soldering yourself :).
Sounds good! I've had a look at the BOM spreadsheet, but was wondering if you happened to have a Mouser cart prepared?

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