CS-80 filter v2.3 for Euro & 5U

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oldcrow
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CS-80 filter v2.3 for Euro & 5U

Post by oldcrow » Mon May 25, 2015 8:21 pm

I originally posted this in the Eurorack area but as it is a DIY thing I'll repeat it here.

Another project I am squeezing in alongside the crowbx euro and crowminius is a eurorack bare board+panel DIY version of my CS80 filter, using the same core circuit I designed in 2001 for the MOTM-480, and more recently the M480 MkII. The euro version is a 28HP panel that includes two CS80 SVF filters and an "Irwin" VCA. A new feature has been added: an input mode select to allow the standard CS80 HP->LP filter chain or a split mode where two inputs go to SVF1, and one input goes to SVF2. All taps are available for both filters in either mode.

The VCA is an inverting linear type that has two inputs, one with a level control and one with switchable AC/DC coupling. The rev2.3 board uses 10-volt sub-regulation to allow operation from +-12VDC to +-18VDC supplies.

A small limited run of the initial batch will be available in June for those interested in testing the pre-production run. Figure $100 for 2 bare boards and a black front panel and something around $115 for a silver front panel with bare boards. (Silver panels mean I have to pay for engraving in-fill)

Update: mockup of a silver panel w/black in-fill added.

--Crow

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Last edited by oldcrow on Tue May 26, 2015 5:40 pm, edited 4 times in total.

sammy123
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Post by sammy123 » Tue May 26, 2015 3:54 pm

I don't know if you want to but can't you order the engraved panels with no in-fill to cut cost? I always do that and then fill with acrylic. Works well.

Anyway...really looking forward to this.

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Post by oldcrow » Tue May 26, 2015 4:34 pm

When I do a black panel (or another color that is not silver) I do not use in-fill. A "natural" aluminum panel might need in-fill of some kind, however. I will order one and experiment.
sammy123 wrote:I don't know if you want to but can't you order the engraved panels with no in-fill to cut cost? I always do that and then fill with acrylic. Works well.

Anyway...really looking forward to this.

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apoisontree
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Post by apoisontree » Mon Nov 02, 2015 9:26 am

Any news?

BARE BONES
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Post by BARE BONES » Mon Nov 02, 2015 11:59 am

looks good!

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Post by oldcrow » Mon Nov 02, 2015 10:54 pm

The production prototype is out in the field. When I get a report back (and nothing needs adjusted) I will order a batch of boards and open sales.

--Crow
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apoisontree wrote:Any news?

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antf4rm
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Post by antf4rm » Mon Nov 02, 2015 11:38 pm

Please put me down for a euro pcb/panel set.

Nice project.

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Post by Dogma » Mon Nov 02, 2015 11:50 pm

For sure - me too

Whats the HP on this bad boy like?
look up!

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antf4rm
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Post by antf4rm » Tue Nov 03, 2015 12:32 am

Dogma wrote:For sure - me too

Whats the HP on this bad boy like?
Says 28hp

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Post by antf4rm » Tue Nov 03, 2015 12:38 am

Really nicely labeled and layed out pcb by the way!

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Post by Dogma » Tue Nov 03, 2015 12:41 am

doh ! i meant HPF :)
look up!

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Post by clusterchord » Tue Nov 03, 2015 7:22 pm

looks great, im definitely interested.


considering the size of the PCBs, when module is built with the (final) production version for euro, will it be parallel or perpendicular mount, and what will the module depth be?


thanks

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Post by oldcrow » Wed Aug 03, 2016 10:34 pm

I have finally ordered a run of boards for this. This first batch is a small one, but subsequent batches will be bigger. I will offer panels (and the panel fpd file) as well.

More soon,

Crow
/**/

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Post by sammy123 » Thu Aug 04, 2016 10:07 am

Oh great news. I'm really excited for this one!! :party:

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Post by GryphonP3 » Thu Aug 04, 2016 6:10 pm

Wooo! Gonna build the gx1 bandpass today and it looks beautiful. excited to see how this one comes out now! :nana:
My cat can eat a whole watermelon ...

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Post by SynthOSphere » Thu Aug 25, 2016 3:43 pm

Darn! :bang:
I JUST passed an order (Crowminius, CS80-Shruthi, NE11K, and PSTDNS) but I just saw that post!!!
(but also didn't see any RR480 on offer on CS80.com though...) :waah:

When are you expecting those boards?
Will they arrive in time for me to maybe add one, before you ship my order? (and if so, are there any left for sale?)

Thanks!

oldcrow wrote:I have finally ordered a run of boards for this. This first batch is a small one, but subsequent batches will be bigger. I will offer panels (and the panel fpd file) as well.

More soon,

Crow
/**/

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Post by oldcrow » Thu Aug 25, 2016 5:37 pm

I've not filled your order yet, that will be this weekend. I will open orders for the RR480 bare boards sometime tonight. --Crow
SynthOSphere wrote:Darn! :bang:
I JUST passed an order (Crowminius, CS80-Shruthi, NE11K, and PSTDNS) but I just saw that post!!!
(but also didn't see any RR480 on offer on CS80.com though...) :waah:

When are you expecting those boards?
Will they arrive in time for me to maybe add one, before you ship my order? (and if so, are there any left for sale?)

Thanks!

oldcrow wrote:I have finally ordered a run of boards for this. This first batch is a small one, but subsequent batches will be bigger. I will offer panels (and the panel fpd file) as well.

More soon,

Crow
/**/

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SynthOSphere
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Post by SynthOSphere » Thu Aug 25, 2016 5:39 pm

oldcrow wrote:I've not filled your order yet, that will be this weekend. I will open orders for the RR480 bare boards sometime tonight. --Crow
:banana:

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Post by SynthOSphere » Sun Sep 04, 2016 9:01 pm

oldcrow wrote:I've not filled your order yet, that will be this weekend. I will open orders for the RR480 bare boards sometime tonight. --Crow
I haven't been able to find the RR480 on your webstore...
Am I just blind or not looking right or is it just you have been too busy?

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mOBiTh
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Post by mOBiTh » Mon Sep 05, 2016 6:47 am

I also can't find this filter on your webstore! :hmm:

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LektroiD
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Post by LektroiD » Mon Sep 05, 2016 3:02 pm

I'm interested, where do we order?

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Post by oldcrow » Mon Sep 05, 2016 4:43 pm

I've not added the filter boards to the store yet, I've been swamped with prep for Knobcon. I want the boards to actually be here too. They have been shipped, just now waiting for delivery. :sb:

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Post by YannickD » Tue Sep 06, 2016 1:50 am

Will it be just the boards or panels as well? :cwejman:

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jgb
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Post by jgb » Tue Sep 06, 2016 3:28 am

Interesting stuff! Hmm... :)

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Post by mOBiTh » Tue Sep 06, 2016 10:48 am

YannickD wrote:Will it be just the boards or panels as well? :cwejman:
I'm guessing panels we can order ourselves direct from Schaeffer/FPD, is that right?

Are there some audio demos for this filter somewhere?

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