I found this last night and I figured I wouldn’t be the only one who wanted to build one of these babies…
its a VCA compressor, those are known for being transparent , no color at all .
its a VCA compressor, those are known for being transparent , no color at all .
So you mean a real compressor! 
I’ve ordered all the bits I need - now I wait a couple of weeks for the bits to arrive and throw this baby together in an afternoon…
With a bit of luck I’ll be able to find a spare afternoon in a few weeks - well a lot of luck actually…
I have built one of those but still have some problems with it. ???
Mainly due to me being a newbe in electronics. Also the 230 voltages are a bit scary…
If you get yours up and running maybe I can ask for some voltage measurements to see where mine is messed up?
//Peter
Yes, i’ve looked at the prodigy-pro forum but I think I lost my motivation somewhere at page 32 of 171. The posted sympthoms just didn’t match mine.
Oh, I see that they have cleaned up the SSL help thread. Cool!
I will give prodigy a new chance. But then there is this lack of free afternoons…
OEP transformers are cheap as chips at rapidonline UK, at least that may provide some color ;D
Let us know how you go with yours man… I’ve had my kit sitting here for about a year or two waiting for that free afternoon to come along hehe
I found this last night and I figured I wouldn’t be the only one who wanted to build one of these babies…
Eh you found this last night?
I allready build this one since they left the recording forums.
It’s a very good compressor.
I have build 1 for someone in NZ . Still have to build 3 myself.
hehehe - I saw a Twin-X posting on some of the boards and figured it must be you!
I’ll let ya’ll know how it goes with the build. Also want to build a stereo Pultec at some stage.
Anyone know of any DIY Vari-MU style compressors?
Anyone know of any DIY Vari-MU style compressors?
Search the prodigy-com forum. There is a simple vari.Mu schematic in it (from PPR) I’ve build once.
Can’t find the link right now.
greets
Doc
thanks doc!
how did the unit you built sound?
It sounds great.
The problem was, to find the right transormers for it.
PPR just invented a “theoretical” design. He simulated it, but never built one.
I ended up with some OEP transformers, which I often used for simular projects.
It was a very easy design and you have to “modify” it a little bit. Then it sounds good.
But be warned. If you are not familiar with tube circuits it isn’t a good starter project at all.
btw. Here are the links to the comp.
http://music-club.rutgers.edu/headfonz/Comp5/Comp5.html
http://www.conditionedresponse.com/DIY/C5/index.html
Have fun!
greets
Doc
thanks for the links Docs.
I’ll stick that in the list of projects to do once I find a myself with some time on my hands.
the compressor is alive and well and sounding AMAZING!
I defo recommend this project to anyone else who needs a decent compressor.
snebenan - what are the symptoms with your unit?
Congratulations on a successful build ;D
The auto mode can be very brutal. at least mine goes bezerk in Auto mode. ;D
Update.
I must have been using dry cardboard or somthing for cables during my last testing.
The hum and noise is completely gone. Unless I try the Auto release mode when it goes into berzerk mode. ??? but mayby that is supposed to happend on the sixth release option?
If you look at the controller PCB on the ssl.pdf at Gyraft site
http://www.gyraf.dk/gy_pd/ssl/ssl.pdf
Did you put your release Switch to 5 or six positions? Mine is set at 6 and it’s the last one that goes weird (rather nice if you want metasonix style distortion)
//Peter
great news that your unit is working!
sounds like an ground issue was the problem…
Did you put your release Switch to 5 or six positions? Mine is set at 6 and it’s the last one that goes weird (rather nice if you want metasonix style distortion)
Hehehe - I’ve set my switch to 5 pos - but I’m gonna set it to 6 if I get some cool fx like you are saying!!!
That’s not a problem - it’s a circuit bend “undocumented feature”. the release is only meant to have 5 positions…
it’s a circuit bend “undocumented feature”. the release is only meant to have 5 positions…
Ah, I have suspected that but never found a good reference that says it’s a “undocumented feature”. But I trust the green alien I found on the internet.
//Peter
If you look at the controller PCB on the ssl.pdf at Gyraft site
http://www.gyraf.dk/gy_pd/ssl/ssl.pdf
Did you put your release Switch to 5 or six positions?
Buh? there’s only 5 there… I gogled and searched prodigy but no joy… Can you give me the lowdown?