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

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abechap024

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Aug 8, 2009
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Provo, UT
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
 

ilfungo

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Apr 25, 2009
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1,356
Location
ITALY
Payment sent for 2 x PRR 176 Rev 2

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


Thanks!!!
 

abechap024

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Messages
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Provo, UT
minor_glitch said:
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.
 

petrol vendor

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Nov 15, 2010
Messages
14
hello, sorry i don´t see what this projekt is... what parts are needed, etc....
Do you have a link about this projekt?
 

abechap024

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Aug 8, 2009
Messages
2,303
Location
Provo, UT
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
 

abechap024

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Messages
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Location
Provo, UT
astroschnautzer said:
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
 

Edward

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Aug 16, 2011
Messages
90
Location
Stockholm - Sweden
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

Well-known member
Joined
Aug 8, 2009
Messages
2,303
Location
Provo, UT
Edward said:
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
 

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