String Filter (40 band resonator)

robotmakers · Joined: Mar 12, 2008 Posts: 1 Location: NY, USA

Is there anyone on this forum (or elsewhere) who would be interested in building me a MOTM or Dotcom compatable String Filter module using JH's circuit boards? Please respond offline.

Thanks very much for your consideration,
Roger

jhaible · Posted: Tue May 13, 2008 4:38 pm Post subject:

And yet another demo:

Short OB-8 arpeggiated strings
http://www.jhaible.heim.at/string_filter/jh_string_filter_2008_3.mp3
1. Dry
2. 40-Band Filterbank and Cello-Filter breadboard circuit
3. Dry
4. 40-Band Filterbank only

I've also published the frequency response plots for this now:
http://www.jhaible.heim.at/string_filter/jh_string_filter.html

JH.

jhaible · Posted: Mon May 19, 2008 3:32 pm Post subject:

What you're going to build ...

http://www.jhaible.heim.at/string_filter/jh_string_filter_sch.pdf

JH.

Norman Phay · Posted: Tue May 20, 2008 5:11 am Post subject:

Good grief! I thought I'd printed out an M C Escher artwork for a minute there.

jhaible · Posted: Tue May 20, 2008 1:24 pm Post subject:

jhaible · Posted: Tue May 20, 2008 3:00 pm Post subject:

update
I've just placed my order at the PCB factory.

(I've ordered a few spares, too, so don't worry if you haven't placed your order with me yet.)

JH.

Now playing: Edgar Froese, Aqua

Spratty · Joined: Oct 08, 2007 Posts: 24 Location: Australia

Is it possible to run this off an 18VAC powerpack JH?

Spratty Wink

jhaible · Posted: Wed May 21, 2008 2:51 pm Post subject:

jhaible · Posted: Wed May 21, 2008 2:58 pm Post subject:

BOM (Bill of Materials)

http://www.jhaible.heim.at/string_filter/jh_string_filter_bom.pdf

Updated web site:

http://www.jhaible.heim.at/string_filter/jh_string_filter.html

JH.

Now playing: P. M. Hamel, Bardo

jhaible · Posted: Mon Jun 02, 2008 11:03 pm Post subject:

I checked at the factory - production of the String Filter PCBs has now started!

JH.

Stavros · Joined: Oct 30, 2007 Posts: 14 Location: Athens-Greece

Hello,

on the BOM list should VTL3C3 rather be VTL5C3?

Thanks

Stavros

jhaible · Posted: Wed Jun 11, 2008 2:17 pm Post subject:

Stavros · Joined: Oct 30, 2007 Posts: 14 Location: Athens-Greece

Hi again,

I have a problem sourcing the 3,9nF Polyester (MKH, MKT) capacitor.
Could that be replaced by a KERKO-500 ceramic one (reichelt has this).

Regards

Stavros

jhaible · Posted: Wed Jun 11, 2008 5:07 pm Post subject:

jhaible · Posted: Wed Jun 18, 2008 11:24 am Post subject:

String Filter boards arrived today.

And even though I had a needle adapter built this time (!) and had every board tested with it individually, I'll build another prototype from a pair of these production-run PCBs before I go and sell them.
So, don't pay anything yet before you have an invoice email sent to you, but expect this in the near future.

JH.

bbob · Joined: Jun 24, 2005 Posts: 362 Location: cleve

whoo!

Inventor · Posted: Thu Jun 19, 2008 6:49 am Post subject:

This whole thingamajig going on here is an amazing example of OpAmp circuits gone insane! It's a beautiful music maker and it's a joy to see my very favorite component of all time, the OpAmp, glorified this way. Now, when do I get to ChucKify this beast?

jhaible · Posted: Thu Jun 19, 2008 10:08 am Post subject:

Inventor · Posted: Thu Jun 19, 2008 11:17 am Post subject:

jhaible · Posted: Sat Jun 21, 2008 4:16 am Post subject: Final tests

Right from the lab - Tassilo my son is helping to test the string filter prototype.
And even though you don't hear much because of the sound "quality" of the Nikon's built-in mic - yes, it tested good.

PCBs ready for shipping - invoices will be in your mail soon.

JH.

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softfin · Joined: Oct 11, 2006 Posts: 187 Location: Far in the north

Received the boards today, thanks a lot JH!
I'll probably attempt to do a stereo version that will be fitted in the same enclosure along with two Tau Pipe phasers, two Triple choruses and two Krautrock phasers. I'm planning to use just one power supply to power all these effects. How much mA would those eight effects approximately need?

jhaible · Posted: Wed Jun 25, 2008 10:56 am Post subject:

softfin · Joined: Oct 11, 2006 Posts: 187 Location: Far in the north