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

jksuperstar · Posted: Sun Oct 19, 2008 7:52 pm Post subject:

Ok!! I'm in for two!! Sending PM...

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

Thanks for the orders folks. PCB's have been ordered and should be to my door within 12 business days.

I have to say, this project has kept me very busy. It is a crazy thing offering a design and with so much interest in this project my biggest fear is something coming up with the circuit and being a disappointment to the synth_diy community. Hitting "send" on the final board design was harder to do that expected. I can only hope the board will meet what I know are your high expectations. Before I placed the order I fired up my builds of the prototypes just to make sure one last time that the project does work and will do what it is supposed to. Many here have helped with the design and testing and for this I thank you! Specifically:

23 is Good (Pete Aleman) - Beta Testing
Fonik (Matthias Herrmann) - Beta Testing, Circuit Resource, PCB Advice
Seranadi - Design Influence
ChrisSugar - Design Influence

And of course the ever so kind Don Buchla for his more than gracious support of the project to begin with!

I hope to have boards in my hands and on the way to you all before the default shipping window for Express PCB. Until then, stay patient, order your parts and get ready... cause I know many, like myself, will be looking forward to getting these going in our system. Respectfully,

Thomas

numbertalk · Posted: Mon Oct 20, 2008 6:33 am Post subject:

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

I edited my previous post about bypass caps. I did not end up adding them. Layout documents are still the same for rev 3 boards which is the final version. Thanks

numbertalk · Posted: Mon Oct 20, 2008 9:43 am Post subject:

Oops, missed that. Thanks!

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

Noiseconformist · Joined: Aug 05, 2008 Posts: 27 Location: Vienna

I eventually managed to miss that window ... Crying or Very sad

scriptstyle · Joined: Jan 22, 2008 Posts: 250 Location: nj

bummertown i was away from my comp all weekend and ment to order fri slipping hard!!! Crying or Very sad

numbertalk · Posted: Wed Oct 22, 2008 9:04 am Post subject:

Sorry if I missed this info somewhere, but are the pads at .100" spacing for the mode & deep switch connectors so we could use a 6 & 2 pin header connector in these spots?

Thanks.

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

The Mode Switch connections should be fine with a .1 header. The deep switch is an odd measurement. The audio ins, CV ins, and output along the bottom edge of the board will work with a .1 connector if you remove "every other" pin from it.

Thomas

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

GENERAL REMINDER FOLKS:

The PCB's were ordered to be produced on Monday October 20th. The process takes 10 business days and then there will be 2 days shipping to me. I will be shipping the PCB's within 1 week or receipt from the board house. All this means that the PCB's will likely ship between November 5th and 12th. Shipping is via First Class Mail or Air Mail for International shipments. I would assume from past shipping experiences that West Coast USA folks could get shipments in a matter of days with International shipments taking up to 14 days or so. Thanks for your support of this project... Holiday building awaits us all. After all, there is nothing better for a Synth Geek than a Lopass Gate in our stockings!

Thomas

Phillip Jeffries · Joined: Aug 23, 2008 Posts: 15 Location: Black Lodge

this is probably really obvious but

I want to build the 1u version. I see that there is one pot on the Mouser list for Resonance, and one pot for Offset. Will I still need to order one 100k linear pot for the one Control spot on the 1u panel (third down from the top)?

thanks

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

Good question,

The parts list is based on what it takes to make the PCB work, not on the specific panel design. The panels are just my suggestions for layout and any pots for attentuation of audio or CV inputs will need to be added to the parts list. Thanks for asking,

Thomas

Luka · Joined: Jun 29, 2007 Posts: 1003 Location: Melb.

offset is more useful than control imo
control is just an attenuator pot for the cv
whereas offset is important for the filter and gate cutoff/sensitivity

you can always attenuate your cv in an external dc mixer
buchla didnt have the cv attenuation on their designs

numbertalk · Posted: Sat Oct 25, 2008 7:57 am Post subject:

Speaking of offset, any tips/suggestions on how to calibrate the offset range trimmer?

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

Adjust offset to "taste". Just allows you to set the offset swing of the pot to a lower or higher range.

Thomas

fonik · Posted: Sun Oct 26, 2008 7:05 am Post subject:

numbertalk · Posted: Sun Oct 26, 2008 7:37 am Post subject:

Ah, where did you get that single pin/post? Can you buy those or is that just removed from a .1 header? In general I have wanted single posts like this before.

fonik · Posted: Sun Oct 26, 2008 8:42 am Post subject:

Funky40 · Posted: Mon Oct 27, 2008 2:22 am Post subject:

In the US you can take MTA.100 connectors for this, but those are not prewired.
The ones from germany are prewired.
Reichelt has horrible shipping costs and 150€ threshold, but Musikding would be a choice for Foreigners.

fonik · Posted: Mon Oct 27, 2008 2:32 am Post subject:

numbertalk · Posted: Tue Oct 28, 2008 8:39 pm Post subject:

Hi Thomas. Any idea when bridechamber plans to have the panels for this project available?

TekniK · Joined: Aug 10, 2008 Posts: 1059

Hi,i wander wich type of vactrol i need to obtain that 'comb filter' effect like the sound op the plan b model have for example?

djthomaswhite · Joined: Nov 22, 2007 Posts: 140 Location: Orange, CA

UPDATE: Boards have shipped from the fab house to me. I should have them by next Tuesday!!!!!! Orders will be put together ad shipped by 1 week from then.

Thomas