abechap024

PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« on: May 21, 2012, 07:41:47 PM »
Hello,

Thanks everyone! Time for another group buy of Rev 2 PRR-176 Vari-mu compressor Stereo PCB boards!!
Here is the white market thread:

http://www.groupdiy.com/index.php?topic=51031.msg647827#msg647827

Thanks!

Here are the Docs

www.acsoundstudio.com/public_html/prr_176/rev_2/BOM_POWER_REV2.pdf
www.acsoundstudio.com/public_html/prr_176/rev_2/BOM_REV2.pdf
www.acsoundstudio.com/prr_176/rev_2/REV2_PRR_176_WIRING_GUIDE.png

Wiring guide uploaded :)
Thanks!


White Market Thread:  http://www.groupdiy.com/index.php?topic=51031.msg647827#msg647827
« Last Edit: June 26, 2013, 12:23:04 PM by abechap024 »
AC Sound - some DIY circuitboards


Re: PRR-176 Vari-Mu Rev 2
« Reply #1 on: May 22, 2012, 10:30:54 AM »
nice! do you have a list of revisions?

abechap024

Re: PRR-176 Vari-Mu Rev 2
« Reply #2 on: May 22, 2012, 12:23:28 PM »
Good idea! I'll get them together along with a picture of the rev 2 board :)
AC Sound - some DIY circuitboards

Hank Dussen

Re: PRR-176 Vari-Mu Rev 2
« Reply #3 on: May 23, 2012, 03:28:35 PM »
How about some extra PSU PCB's for us version 1 builders?  ;D

ArnauTS

Re: PRR-176 Vari-Mu Rev 2
« Reply #4 on: May 24, 2012, 07:04:16 AM »
Money sent ;D
if you can have it all, stop in the middle

roy

Re: PRR-176 Vari-Mu Rev 2
« Reply #5 on: May 25, 2012, 03:28:13 AM »
money sent

ilfungo

Re: PRR-176 Vari-Mu Rev 2
« Reply #6 on: May 26, 2012, 09:21:07 AM »
Payment sent for 2 x PRR 176 Rev 2

It's possible to add extra PSU board for rev 1?


Thanks!!!

jandoste

Re: PRR-176 Vari-Mu Rev 2
« Reply #7 on: May 26, 2012, 11:00:04 AM »
Payment sent for 2 x PRR 176 Rev 2

It's possible to add extra PSU board for rev 1?


Thanks!!!

+1

minor_glitch

Re: PRR-176 Vari-Mu Rev 2
« Reply #8 on: June 03, 2012, 08:55:57 PM »
I'd definitely like a psu board for my rev1 if you plan to sell any individually.

abechap024

Re: PRR-176 Vari-Mu Rev 2
« Reply #9 on: June 04, 2012, 10:44:10 AM »
I'd definitely like a psu board for my rev1 if you plan to sell any individually.

Good Idea, I'm most likely going to also offer these separately, will post when I have a price.
AC Sound - some DIY circuitboards


JayDubrek

Re: PRR-176 Vari-Mu Rev 2
« Reply #10 on: June 05, 2012, 09:45:12 AM »
+1 in the PSU board Abe!
Jay

Re: PRR-176 Vari-Mu Rev 2
« Reply #11 on: June 06, 2012, 11:51:41 AM »
hello, sorry i donĀ“t see what this projekt is... what parts are needed, etc....
Do you have a link about this projekt?

Re: PRR-176 Vari-Mu Rev 2
« Reply #12 on: June 06, 2012, 11:52:55 AM »
ok, sorry, i was blind. no link needed... Thanks for doing this!!!!

abechap024

Re: PRR-176 Vari-Mu Rev 2
« Reply #13 on: June 19, 2012, 10:45:55 AM »
Hi Ya'll,
Thanks for the orders. Sent the order to the Fab House yesterday, so should get them in a couple weeks! I ordered extra so people can still order if they choose!
Thanks!

Abe


Errata for Rev 2:

Power resistors to 10 ohms
Fixed Smaller Edcor footprint
Fixed INA input ground on pin 1
Attack/Release cap now on board for both channels
Fixed B voltage power (more caps)
Made both channels more alike for ease of stuffing
A dedicated switch for bypass
Changed 50k resistors to 56k
Fixed various Cap footprints
Made a consistent 100nf or 0.1uf
Made power supply off board
Made same TX options for input for interstage
AC Sound - some DIY circuitboards

astroschnautzer

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #14 on: July 25, 2012, 03:40:00 PM »
Q: what does the comments behind resistors and caps mean;  "res400" ,"CAP300RP" etc...., is it size?

abechap024

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #15 on: July 26, 2012, 12:07:31 AM »
Q: what does the comments behind resistors and caps mean;  "res400" ,"CAP300RP" etc...., is it size?
yep thats the size in mils. which i think is 1 mil = to 1/1000 inch
Best,
Abe
AC Sound - some DIY circuitboards

astroschnautzer

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #16 on: July 26, 2012, 02:29:44 AM »
Thanks.

Edward

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #17 on: July 27, 2012, 06:33:22 AM »
Any recomendations on what  trimmers ( VR 10, 12, 7, 8 ) to use for the power PCB? And is 1N4764A-TAP ( Mouser part # 78-1N4764A-TAP ) a good choice for D14?
« Last Edit: July 27, 2012, 08:44:14 AM by Edward »

abechap024

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #18 on: July 28, 2012, 05:17:36 PM »
Any recomendations on what  trimmers ( VR 10, 12, 7, 8 ) to use for the power PCB? And is 1N4764A-TAP ( Mouser part # 78-1N4764A-TAP ) a good choice for D14?

Yep that looks fine for d14. for trimmers look on eBay...they seem the be the least expensive: example

http://www.ebay.com/itm/10pcs-5K-Trimmer-Trim-Pot-Variable-Resistor-3296-/310353115764?pt=LH_DefaultDomain_0&hash=item48427cba74#ht_2788wt_1270

Best,
Abe
AC Sound - some DIY circuitboards

herrmann

Re: PRR-176 Vari-Mu REV 2 *Updated Docs 7/1712*
« Reply #19 on: July 29, 2012, 06:11:15 AM »
LM337 is missing in the bom.