Sound Skulptor: Pre's, Compressors, Tape Simulator, Professionnal Audio Kits

[TillM]

Hey,
Short question.
Do I really need the Nylon washers for the Carnhill VTB9045, cause when i place the nylon washers between the transformer pcb the screws are too short, without the washers the pcb attach perfectly.
Hope somebody can help me

 

[JPK]

The washers only have a mechanical purpose. Because the transformer surface is slightly recessed, the washers are leveling it with the metal envelope. There is no electrical need for them. If the screws are too short, you may just leave the washers out.

 

[brndvnrdn]

Hi JPK,

Built a MP573 yesterday. Very nice, sounds very good.

When powering off the unit, there is a pop at the output. Is this to be expected? Or is this an error?

Thank you.

 

[TillM]

short answer, yes.
My two MP573 have the same pop, they work since months without any issue.

 

[brndvnrdn]

short answer, yes.
My two MP573 have the same pop, they work since months without any issue.

Okay, good to hear.

 

[wave]

Hi JP,
I'm having an issue with an MP573. I can't get the bias to change. I'm only getting .015V at TP4.
I'm only getting 1.08V on the Q4 side of R42.
I have swapped out Q6 and there's no change

Any ideas?

I had the red and green output transformer wires crossed! Ooops!
Working perfectly!

Thanks
Dave

 

[micaddict]

I had the red and green output transformer wires crossed! Ooops!

Better not mix those colors up when you're nearing a traffic light. 

Working perfectly!

 

[JPK]

LA502 New optical compressor available!

Look in the first thread.

 

[Spiritworks]

Awesome. Two of these, along with two of the tape simulators, are on my wish list. I am loving all of my Sound Skulptor products

 

[Tschem]

Looks awesome!
What transformers are you using in the TS500 and the LA502 ?

 

[JPK]

Carnhill/OEP transformers.

 

[slipperyflax]

Fantastic!

Tell me, when it comes to these kind of optos that's used here (can be seen at step 11 in the assembly guide http://www.soundskulptor.com/docs/la502-assembly-guide-01.pdf ), is there any need for a matched pair when you want to have a stereo pair?

 

[JPK]

The opto-couplers we use are fairly consistent and there is no need for matching as long as you stay with moderate compression levels .

 

[druu]

May I ask how the slam function works on the CP5176? How is it implemented with the 2x6 rotary?

 

[JPK]

The CP5176 Slam mode recreates the 4 depressed buttons mode by setting the sidechain gain, threshold and FET bias the same way.

 

[druu]

The CP5176 Slam mode recreates the 4 depressed buttons mode by setting the sidechain gain, threshold and FET bias the same way.

Thanks JPK. I understand how it would normally be implemented with a DPDT toggle but just confused how you managed to do this with a spare step position on a 2x6 rotary? This would typically require 4 poles to short 4 points within the ratio circuit, can it be done by only shorting two points?

 

[JPK]

The rotary switch is 2x6. So one contact manages the gain and the other one does the threshold and FET bias.

 

[JPK]

EQP501 New Passive Equalizer available!
Look in the first thread.

 

[slipperyflax]

Fantastic! 

 

[Claudio]

EQP501 New Passive Equalizer available!

Beautiful! I wish this had been available when I ordered my last three modules from you last month.

By the way, Jean-Pierre, you might want to edit the links in your first post of this thread. Lots of broken links there...

Best,
Claudio