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

diablojoy · Posted: Sat Nov 14, 2009 5:31 pm Post subject:

thanks for the reply thomas
and also a big thankyou for your generosity in providing
this project.

denis.

poppaneedsanap · Joined: Feb 04, 2009 Posts: 7 Location: Shame Tunnel

just paypal'd for 2 boards..

man oh man.. I'm just getting into the DIY side of things, and I'm glad there was a 3rd run of these boards.

beautyofdecay_ · Joined: Aug 14, 2009 Posts: 38 Location: Netherlands

Hi Thomas,
Received the boards today.
Thanks!

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

1st post 'cause I ordered 2.

If there are any left this next Friday...I might order 2 more. Wink

Now I've just got to get busy and put together my DIY kit. Need a real soldering station and DMM... Shocked

...what have I done? I started trying all this with PAIA stuff back in the late 80s but I didn't have the internet as it is now at my disposal, with all you small suppliers and kind helpers to back me up. And the ability to design and have built special front panels that are professional quality is a godsend.

Cheers!

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

quick question:

if i add a low current LED in series with the 2 vactrols do i need to modify anything like R6?

fonik · Posted: Mon Nov 23, 2009 1:01 am Post subject:

if you wanted an optical indication of whats going on inside the vactrols, why don't you add the LED in parallel with a resistor to GND? i did it this way for the PS3100 resonators.
if you added it in series you would have a voltage drop of approx 0.3V, however i don't think you would have to lower R6, because you have trimmer TP1 upfront anyways to compensate the voltage drop (i think).

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

great thanks

Electric not magic · Joined: Sep 25, 2009 Posts: 5 Location: Australia

Boards arrived last Friday in Australia, thanks for the great project (Both Thomas and Don)!

Cheers.

Scot Solida · Joined: Oct 24, 2009 Posts: 100 Location: Hutchinson Kansas

I just finished the first of my two dual LPG units about an hour ago. Here's a crappy shaky-cam photo of it installed in the Big Feller:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

and a couple of minutes of the first noodle:

http://www.olscratchrecordings.com/Sounds/LPG.mp3

That's two Synthesizers.com oscillators, one through the fast side and one through the slow. The LPG is being modulated by the STG Time Modules. Bit of Echoplex on the end. You can hear how awesome the resonance on this thing sounds. Really squelchy and biting.

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

NICE Noodle and NICE panel design. Please get he a hi res photo so I can post on www.naturalrhythmmusic.com

Thanks!

Scot Solida · Joined: Oct 24, 2009 Posts: 100 Location: Hutchinson Kansas

Thanks Thomas... though really, it's just a variation on the panel in the PDF. I simply spaced it out a little to better fill the DotCom panel. I'll try to take a hi-res pic soon, though I am a lousy photographer (and the printing is a little screwy on the top section). I tweaked the design a little and I think I am going to print another in a week or so. If so, I'll take a pic of that one and send it over. I'm having great fun with this module. Thanks to you for your hard work!

diablojoy · Posted: Thu Nov 26, 2009 12:09 am Post subject:

all boards received Very Happy

cheers mate and thanks again.

denis.

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

An auspicious beginning! My 2 boards arrived safely today at the same time as my brand new Weller soldering station and X-Acto Helping Hands!
surprise

I feel lucky to have gotten in just before they ran out again. Thanks bunches, Thomas!

kollo · Joined: Jun 02, 2009 Posts: 19

got my boards today, thanks! i ordered the parts through my school, which will make it the cheapest (and only) dual lopass gate for eurorack in my collection so far Smile

Dave Kendall · Posted: Wed Dec 02, 2009 7:13 am Post subject:

Thanks Thomas - got the boards this morning.

Nearly didn't though, because some monkey at Customs had completely opened the papckage, presumably to check it contained what it said on the label, and then just tossed it on the mailing delivery pile without re-sealing it Posted Image, might have been reduced in size. Click Image to view fullscreen.

Fortunately, both boards were still in it when it arrived........ Smile

Thanks again for doing this project, and for the 3rd run. Looking forward to building it this christmas time.

cheers,
Dave

tommi · Posted: Mon Dec 07, 2009 5:19 am Post subject:

I was beginning to accept the loss of my PCBs in the travel but this morning I found them on the mailbox! Nice way to begin the week!
Thank you Thomas!

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

Actually building them's going to take a while for me as I'm still setting up my DIY gear...oscilloscope's on the way, still need a good DMM and have to get most of the parts for theses...

BUT, I'll be putting 2PCB on one panel, probably a full 19" wide and 2U panel high. They'll be arranged identically, but one half will be a mirror of the other (i.e., knobs on the left and right with all the jacks in the middle). I'll be doing multiple audio and CV on both, and using BOTH slow and a fast Vactrols on each with a 3PDT switch to select between them. So each will have Normal/Deep, Amp/Both/Filter and Slow/Fast switches, 7 or 8 attenuators, and a bunch of jacks in the middle.

(freakwincy) · Joined: Nov 15, 2009 Posts: 9 Location: Dallas

Is there any chance of another run of these boards?

poppaneedsanap · Joined: Feb 04, 2009 Posts: 7 Location: Shame Tunnel

got mine built. need a euro panel for 1... gotta make a trek to the metal supermarket here

epk · Joined: Apr 19, 2009 Posts: 19 Location: Sacramento, CA

2 of my boards are stuffed except for the vactrols.

I'd like to be able to switch between two different vactrols to get a different response, but I'm not sure the best way to do that with what I've got.

The switch is yer standard dpdt on-on toggle, but here's the thing, (for one board) I've got a VTL5C3/2, and 2 VTL5C2's.

I'd prefer to just connect the positive leads of the LED to the switch, but it seems like I'd have issues with the resistors running in parallel.

Assuming I need to switch the cell leads, do I couple the LED leads (respectively), and one of the cell leads of the VTL5C2's. Then I'd have 5 leads and then connect it like a dual?

Would it work to connect the positive LED lead and the center cell lead to each side of the switch?

Do I need a 3pdt toggle to do this the right way?

Thanks,

epk

The Peasant · Posted: Fri Jan 22, 2010 12:54 pm Post subject:

epk · Joined: Apr 19, 2009 Posts: 19 Location: Sacramento, CA

Sweet! thanks Doug!

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

Hello,

It would appear demand has grown large enough for another small run of Resonant Lopass Gate PCBs. There are many examples of these in action on the web and more information at http://www.naturalrhythmmusic.com/lopass.html. I will be taking orders from today until March 31st. Here's how it will work with ordering.

Due to having a baby on the way I will be producing these boards to order, no extras this time around. If you want boards, PayPal me $15 per board to:

djthomaswhite@yahoo.com

Your payment subject should read "LPG Order"

Shipping to the world is included in the price of the order. I will place the board order on April 1st (no joke) and the turn around time for shipping should be 2-3 weeks, but usually closer to 2. Once I receive the boards I will pack them for shipping and notify you when they ship via USPS First Class Mail. Contact me privately with any questions. These boards work with any popular power from +/-12v to +/-15v, however, the power connector on them is for MOTM or Synthesizers.com. Other connections (like Euro) require hand wiring the power instead of using a MTA connector.

Thanks folks!,

Thomas White
Natural Rhythm
www.naturalrhythmmusic.com

droffset · Posted: Thu Mar 18, 2010 6:12 pm Post subject:

Awesome, I missed out on previous batches so thanks for doing another run.

/mr · Posted: Fri Mar 19, 2010 4:43 am Post subject: