PRR-176 Vari-Mu REV 2 - *Group Buy 7/13!*
- Thread starter abechap024
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abechap024
Well-known member
ilfungo said:
Great! Glad you got them. Time constant, like an "auto-release" found on the SSL? It would surely be possible, I think just adding a resistor network along with the caps would work. I'd have to double check the SSL schematic to be sure....
Yea, you could make it on a switch, and switch out the release pot, or somehow incorporate it. Then build up something like on the GSSL just scaling down the capacitance/resistance values to 1uf (or 2uf) or whatever you want! there are no rules.
abechap024
Well-known member
www.acsoundstudio.com/prr_176/rev_2/REV2_PRR_176_WIRING_GUIDE.pngilfungo said:
http://www.quadesl.com/attenuator.html
hope this helps!
Best,
Abe
abechap024
Well-known member
ilfungo said:Thanks Abe!!!
I do not understand "Total attenuation db"?
Ok, thats a good question, because if using a lorin you only have 12 steps, so you want to maximize usable steps. I would say for a compressor -40dB max attenuation might be a good starting point. But it depends. you might want to wire up a potentiometer first and see what range on the potentiometer you use the most then measure the resistance and us that to make your lorin switches.
abechap024
Well-known member
ilfungo said:
Well looking at it I would say give it a shot. Just copy the 750k/91k & 0.47uF/6.8uF and switch it into the circuit, though I don't expect it to react exactly the same, you'll probably need some tweeking with values and you'll have to modify/change the existing PCB. I find the comp to be pretty musical as is, and never felt the need for an "auto" release, but who knows, you don't miss what you've never tried!
abechap024
Well-known member
ilfungo said:sorry ... , something is missing in the second channel?
???
Haha! Sorry 'bout that. I'll update the picture. Thanks for pointing it out!
baadc0de said:
Thanks! And yes, when stereo link only the Left controls work, makes it a lot easier to setup stereo cohesiveness, instead of trying to match attack/release controls.
I just finished the rev 2!
I have a strange problem on the first channel:
when I go up with the output pot (full CW) increases the compression ....
even with no input signal, the meter starts to score more and more compression ...
I checked all connections and they seem ok.
What can be?
Has anyone finished the REV 2?
thanks
I have a strange problem on the first channel:
when I go up with the output pot (full CW) increases the compression ....
even with no input signal, the meter starts to score more and more compression ...
I checked all connections and they seem ok.
What can be?
Has anyone finished the REV 2?
thanks
Hello ABE I got a strange problem:
the first channel
pot output from half to three quarters, and distorted sound strange, if I decrease or increase, the problem goes away .....
rechecked all components
replaced the doa
replaced all ICs
but nothing changes ..
What can be?
Thanks
the first channel
pot output from half to three quarters, and distorted sound strange, if I decrease or increase, the problem goes away .....
rechecked all components
replaced the doa
replaced all ICs
but nothing changes ..
What can be?
Thanks
abechap024
Well-known member
So just he first channel? have you check the pot? Does it happen when stereo linked/not? compression not? bypassed etc...?ilfungo said:
Yes just the first channel
I changed the pot but nothing has changed.
always the case (compression in or out)
in mono and in stereo,
The only thing I've noticed that if I exclude physically
U1 or U2 the problem goes away ...
I changed the pot but nothing has changed.
always the case (compression in or out)
in mono and in stereo,
The only thing I've noticed that if I exclude physically
U1 or U2 the problem goes away ...
abechap024
Well-known member
ilfungo said:Yes just the first channel
I changed the pot but nothing has changed.
always the case (compression in or out)
in mono and in stereo,
The only thing I've noticed that if I exclude physically
U1 or U2 the problem goes away ...
So if you take out the ne5534 or the tl072 from the sidechain it doesn't make that noise? That is strange, quick fix is you could strap a 10pf to 100pf capacitor across your output pot, that would probably help. when did you start noticing this? have you cleaned your board of flux?
abechap024
Well-known member
have you tried trimming the threshold gain down on that channel?
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