PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*

[abechap024]

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

 

[mitsos]

nice! do you have a list of revisions?

 

[abechap024]

Good idea! I'll get them together along with a picture of the rev 2 board

 

[Hank Dussen]

How about some extra PSU PCB's for us version 1 builders?  ;D

 

[ArnauTS]

Money sent ;D

 

[roy]

money sent

 

[ilfungo]

Payment sent for 2 x PRR 176 Rev 2

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


Thanks!!!

 

[jandoste]

Payment sent for 2 x PRR 176 Rev 2

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


Thanks!!!

+1

 

[minor_glitch]

I'd definitely like a psu board for my rev1 if you plan to sell any individually.

 

[abechap024]

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.

 

[JayDubrek]

+1 in the PSU board Abe!
Jay

 

[petrol vendor]

hello, sorry i don´t see what this projekt is... what parts are needed, etc....
Do you have a link about this projekt?

 

[petrol vendor]

ok, sorry, i was blind. no link needed... Thanks for doing this!!!!

 

[abechap024]

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

 

[astroschnautzer]

Q: what does the comments behind resistors and caps mean;  "res400" ,"CAP300RP" etc...., is it size?

 

[abechap024]

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

 

[astroschnautzer]

Thanks.

 

[Edward]

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?

 

[abechap024]

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

 

[herrmann]

LM337 is missing in the bom.