PCB layout for PRR Vari-Mu

[therecordingart]

Does anyone have a layout for the PRR Vari-Mu?

 

[gyraf]

don't think so. question been asked before..

 

[ciminosound]

Kent did some work with PRR on this a while ago. I haven't built or tested this info personally but maybe others have...?

http://www.conditionedresponse.com/DIY/C5/index.html

:sam:

 

[Moby]

I have. Somewhere... Have to search a little... :wink:

 

[12afael]

what is wrong with this?
http://www.conditionedresponse.com/DIY/C5/C5PCB.pdf

I etch it two days ago ,I just need a drill to finish it .

 

[Moby]

[quote author="12afael"]what is wrong with this?
http://www.conditionedresponse.com/DIY/C5/C5PCB.pdf

I etch it two days ago ,I just need a drill to finish it .[/quote]
Yes, I have the same :grin:

 

[Kev]

as far as I know
Kent's site is still working and current
(we did think Kent's server was going to close)
it should agree with the stuff at the Factory

http://www.diyfactory.com/projects/diy12au7comp/diy12au7comp.htm

PCB
http://www.diyfactory.com/projects/diy12au7comp/C5PCB.pdf

PRR's original page
http://music-club.rutgers.edu/headfonz/comp5/Comp5.html
note how long ago it all was
PRR, May 2003

time does fly

 

[Svart]

It works. that layout is good. I built two, one for use, the other for playing around with various ideas like class A output and such.. i'm real close to having that done too.

 

[12afael]

Svart, what kind of transformers are you using?

 

[NewYorkDave]

Sorry to be a grouch, but... geez, must there be a PCB for every project? Ya could wire that up on a piece of perfboard in less time than it takes to talk about making a PCB. I could understand needing a PCB if you wanted to make a hundred of 'em, but...

 

[Svart]

for the input trafos I used the radio shack trafos that PRR suggested. they work much better than you would think.. to the point of not noticing them at all. for the class A output I am using sowter 8751(?) and ba283s. I might try some edcor replacements too.

 

[therecordingart]

The only thing that I'm having a hard time rapping my head around is how to hook up the attack and realease. I'm going to build a stereo unit, and what I'm reading on the websites and layout isn't sinking in. Also....hooking up the meter since there are two meter sections on the PCB. Do I just connect to one of them?

For the attack and release....it says on the layout something like from ATT to ATT/REL from REL on channel 1 then from REL TO ATT/REL from ATT on channel 2. This is going over my head.

Any help?

 

[Ptownkid]

[quote author="NewYorkDave"]Sorry to be a grouch, but... geez, must there be a PCB for every project? Ya could wire that up on a piece of perfboard in less time than it takes to talk about making a PCB. I could understand needing a PCB if you wanted to make a hundred of 'em, but...[/quote]

I remembered thinking the same thing the fist time I looked at the schematic, pretty light on the parts...

 

[mikeyB]

How good/accurate can the tracking of a stereo varimu be. Mastering buddy of mine likes the look of this but he don't want to master in MONO! :wink:

 

[Svart]

the PCB is layed out for a dual mono unit.

 

[bernatvm]

Anyone still have the files to etch those PCBs? All the links are broken...

 

[Gus]

From the waybackmachine

https://web.archive.org/web/20090309105526/http://www.conditionedresponse.com/DIY/C5/index.html

https://web.archive.org/web/20070709180855/http://www.conditionedresponse.com/DIY/C5/C5PCB.pdf

 

[bernatvm]

Is this a good layout for this project?