ding

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #260 on: November 27, 2013, 04:12:08 PM »
Ok black anodized with white looks bad ass. I am still searching for those switches.  ::)
« Last Edit: December 04, 2013, 03:29:29 PM by ding »


baadc0de

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #261 on: November 28, 2013, 04:26:40 AM »
Hello all!

Quote
I took PCC189 tubes

Are PCC189 compatible with this compressor?

It's a real pain to have matched pair of 6BC8.
I've bought 10 pairs and still have from 1 to 5db difference of level compression.

My comp is a stereo with just one set of knobs for both channels, no link and outboard threshold pot. All built with Vishay/dale precision resistors.

Best regards.

Yeah, they work really well re: compressor action. I have a bunch of 6bc8 (from quirky channel master japanese ones, to some RCA, WE..) and these sound just as good if not better. I really like my PRR176 on acoustic guitars, bass and vocals. Can be very nice and gentle GR or quite aggressive.

Spencerleehorton

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #262 on: November 29, 2013, 02:10:38 AM »
HI Guys,

i have been reliable informed that ECC180, 6BZ7, 6BZ8 are all equivalents for the 6BC8.
Can anyone verify that they will be ok?

regards

Spence.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #263 on: December 01, 2013, 04:04:06 PM »
IM still waiting on the rev 4 pcbs to get in but can anyone tell me.......

1)what the compression ratio is on this guy and where in the schematic can I change it? I want to have a compress (1:5) and limit mode (1:15) if possible

2) would also like to know what tubes work the best and are easiest to find match pairs of, I have 4 6bc8s I bought in preparation of this but they are un-matched and I doubt they are very close...

3) has anyone not had and issue with Edcor Transformers and noise? I want this to be a really awesome build but the price just seems to keep climbing haha

4) I cant seem to find a lot of info on calibration. And I definitely cant find any procedure steps
never mind found them
5) Abe can the IC's (ne5524, TL072, INA134) you have on the rev 2( assuming they are still in the  rev4) can they be replaced with your discrete dip 8 kits? I think it would be awesome to make mine all discrete.
« Last Edit: December 01, 2013, 06:12:31 PM by berkleystudios »
Adam
only got here by owning a soldering iron and bad life decisions.

ding

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #264 on: December 04, 2013, 03:15:13 PM »
Got my panel finished. In case anyone wants to in on it and get one also I started a black market thread.
http://groupdiy.com/index.php?topic=54476.0

JeromeMason

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #265 on: August 25, 2015, 03:38:09 AM »
Hey guys, I know this is an older thread, but I've just built a Rev 2 and I'm getting a major ground buzz. I'm using all Edcor for input/interstage/output but the entire board is populated in case I want to switch at some point. I saw in the Rev 4 that there was some jumpers that had to be made to the board regardless of what types of transformers, just wanted to see if anyone might have a build doc describing any details on this or can help me out with tracking this down.

I have the wiring diagram, I have to admit I'm a little confused on the orientation of the pots, meaning which legs in the diagram are 1,2,3 so I can make sure I've got that right on my end. I want to believe this is something very simple. You can tap on the tubes and hear it over the hum plain as day. I'd love to get this up and running, so, if anyone has any documentation, or can point me to where it could be hiding in this thread I would be insanely appreciative.

JeromeMason

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #266 on: August 28, 2015, 03:39:51 PM »
I know it's old... but.... anyone? :)

SIXTYNINER

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #267 on: May 28, 2018, 02:28:22 PM »
Just for ask if this project thread is still open or closed (links at first page do not work)
thanks
>>" 1 Picture say what billions words cannot "<< - >>"SMD Kill the DIY STAR"<<
Why in the  forum  if no share

scott2000

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #268 on: May 28, 2018, 03:00:29 PM »
The version 4???  has a recently finished project and some recent pdfs for that build if it helps....
https://groupdiy.com/index.php?topic=54563.msg871586#msg871586

« Last Edit: May 28, 2018, 03:54:23 PM by scott2000 »

SIXTYNINER

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #269 on: May 29, 2018, 09:20:32 AM »
The version 4???  has a recently finished project and some recent pdfs for that build if it helps....
https://groupdiy.com/index.php?topic=54563.msg871586#msg871586

Thanks for post !
started from the rev1 , then found the rev2 (docs - broken links) , now thanks to scott2000 the rev4 ,
after checked found  also there broken links ….. hmmm….little odyssey….
please any chance for the rev4 docs ?
thanks
>>" 1 Picture say what billions words cannot "<< - >>"SMD Kill the DIY STAR"<<
Why in the  forum  if no share


scott2000

Re: PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
« Reply #270 on: May 29, 2018, 09:29:06 AM »
Thanks for post !
started from the rev1 , then found the rev2 (docs - broken links) , now thanks to scott2000 the rev4 ,
after checked found  also there broken links ….. hmmm….little odyssey….
please any chance for the rev4 docs ?
thanks

Just click the link and scroll up ...All of the pdf files are there.....ilfungo posted them


 

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