Resonant Lopass Gate PCB's (New Batch 4/29/12)

xpander · Posted: Sun Dec 07, 2008 5:07 pm Post subject:

do you have any extra boards leftover?? i'd still like a couple.

a_guy_called_tom · Joined: Jun 21, 2008 Posts: 31 Location: mountains

TekniK · Joined: Aug 10, 2008 Posts: 1059

10x Tom!

Appliancide* · Posted: Mon Dec 08, 2008 3:55 pm Post subject:

sduck · Posted: Tue Dec 09, 2008 6:25 pm Post subject:

Ok, show and tell time. Just finished my version of the complete bells and whistles version. Based my panel on Thomas Whites design, with several changes.

The back - unlike previous builds, I didn't have to use cable ties this time - the wires all seemed to fall into place on their own.

These images and more are on my flickr page, if you want to see bigger images -

http://www.flickr.com/photos/sduck409/

Thanks Thomas (and team) for the great pcbs! It sounds fantastic!

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fadeddata · Joined: Dec 27, 2004 Posts: 43 Location: Nashville TN

Ok, show and tell it is! I'm going to be wiring this up tomorrow morning Smile

-dustin

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BananaPlug · Posted: Sun Dec 14, 2008 7:30 am Post subject:

Very nice. Which method did you use for the panel graphics?

fadeddata · Joined: Dec 27, 2004 Posts: 43 Location: Nashville TN

I used an Epilog laser engraver that I have access to. The pictures don't really do it justice. I'm repeatably amazed at how well laser engravers work. We should all go in on a group buy for one Smile

-dustin

slo · Posted: Sun Dec 14, 2008 9:36 am Post subject:

sduck · Posted: Sun Dec 14, 2008 8:55 pm Post subject:

Yes, the control in is just a cv in without a pot.

And hopefully Dustin will post pics of the back of his LPG after he wires it all up - he showed me some of his work the other day, and his wiring is incredibly immaculate. And it's pretty fantastic looking from the front too!

LektroiD · Posted: Sun Jan 04, 2009 2:55 am Post subject:

What is everyone doing for the 50KΩ resonance mod resistor? I've not managed to source a 50KΩ resistor anywhere. Can I put a 47KΩ and a 3KΩ in series to make this value, or is it not critical to get it exact and get away with a 47KΩ on its own?

Also, must the 4.7MΩ resistor be carbon? I only have metal film

blue hell · Posted: Sun Jan 04, 2009 3:30 am Post subject:

mono-poly · Posted: Sun Jan 04, 2009 4:56 am Post subject:

doctorvague · Posted: Sun Jan 04, 2009 6:40 am Post subject:

fadeddata · Joined: Dec 27, 2004 Posts: 43 Location: Nashville TN

Woops! Sorry for the delay in responding. The panels are drilled through FPE (but I have a drill press now so I might start doing them myself *if* I can find a place to source anodized cut aluminum (anyone???)).
My employer has an epilog laser engraver that I used for "etching the panels". From what I know it actually is chemically changing the anodization to a pale off white. It's a very specific look that I like very much.
Oddly it feels raised and not as if it removed any material.

-dustin

American Gladiator · Joined: May 02, 2007 Posts: 13 Location: USA

I have made three of these, and all have had a problem with the CV input cutting out at times, acting unstable, and changing in response to touching the faceplate. Anyone else noticed this? Possibly just a problem with my system interacting with this particular module. Running it off of a Blacet power supply.

orange · Joined: Jan 06, 2009 Posts: 1 Location: sweden

Hello Thomas!

Is it possible to order a couple of low pass gate PCB´s?

All best

dj orange

ericcoleridge · Joined: Jan 16, 2007 Posts: 889 Location: NYC

I'd really love to see made available again as well. I've made a quad version already-- but I'd like another.

Any chance of this PCB seeing production again Thomas?

discoslut · Joined: Dec 04, 2008 Posts: 6 Location: Netherlands

Hi Thomas,

If you ever do a new run of boards I'm up for two.

thanks

intellijel · Joined: Sep 10, 2006 Posts: 67 Location: Vancouver, BC

Please add me to the list for 4 pcbs if anymore become available!

Or can we get the gerber files and have our own made?

thanks, Danjel

Peake · Posted: Fri Jan 23, 2009 11:24 pm Post subject:

From page 1:

"I just got the approval from Don himself to put together a one-time PCB run for the Mathias (Fonik)-based PCB layout of Don's classic Lopass Gate."

Embarassed

To burn your own:

http://electro-music.com/forum/topic-22079.html

sduck · Posted: Fri Jan 30, 2009 10:05 pm Post subject:

Ok, I finished putting together all of my pcb's, and put numbers 2 and 3 behind this panel. I've got fast vactrols on the left, slow on the right for some variety.

I'd like to thank fadedata (Dustin) for inspiring to clean up my behind the scenes wiring - there's still room for improvement, but it's a lot better than previous efforts.

mono-poly · Posted: Sat Jan 31, 2009 2:04 am Post subject:

That's a nice looking dual LPG!

sduck · Posted: Sat Jan 31, 2009 8:09 am Post subject:

Thanks, Mono-poly.

A question - I've got these fairly expensive trimmer pots sitting on the pcb's of these things, and have no idea what they do. Does anyone know? I suppose I could just start tweaking the things and see what happens, but I'd rather know what I'm looking for first.

numbertalk · Posted: Mon Feb 02, 2009 8:02 am Post subject: