GSSL HELP THREAD!!!

[krsstyles]

Your right this should not be in public and this is not my general style of communication but when you disregard my time and money then block me I have no choice but to make this public… this is information regarding your conduct with a customer and may be of some use to some one buying from you.

BTW we used the email that was on your website with the notice in the monthly shipping and is still there now. So stop lying I am not going to apologies for you not doing your job as a business owner.

I don’t want to deal with your business or your arrogance! it’s been the worst audio related experience.

 

[tomac]

short question,

I've finished another GSSL with Turbo & SSC.
It works great except one thing:
When turn it on so the compressor is in bypass, the needle hits the very left for about 2 or 3 seconds, then it slowly returns to the "0" position.
audio wise this is accompanied by a very loud output of the GSSL for the above mentioned 2 or 3 seconds then the level returns to normal.

The strange thing is, this is only when I power on the GSSL into bypass mode. When I power it on with compressor engaged it doesn't occur - UNTIL I switch in bypass for the first time after powering on

So it has to be something that comes before the compressor side-chain circuit.

It's a version 11 pcbs and I have to add, that instead of the 15k resistors in the output circuit I used a 10k resistor + a 10k trimmer to fine trim it to unity gain...but that couldn't be the problem could it?

Thanks for any ideas!!

EDIT: solved. I forgot to cut that one pin of the 2180. As soon as I did the GSSL behaved normal

Hello, do you have a copmplete drawing of the GSSL with Turbo and SSC?. Thx for yr efforts. B.R. Thomas

 

[Script]

Search, and you will find.

 

[gyraf]

it’s been the worst audio related experience.

Darn, I honestly envy you if you really believe this to hold true. And you even got your money back?

But please, keep this sort of public laundry outside of the Giant GSSL Help Thread - we are trying to keep it as clutter free as possible

Earlier topically unrelated posts in this thread may be deleted at some later time

/Jakob E.

 

[bobeschism]

Can someone give me a link for decent quality buttons (UK only) like the attached pic please? Many thanks.

 

[Walrus]

https://uk.farnell.com/w/c/switches-relays/switches/pushbutton-switches?product-range=31|31-series

 

[Olegarich]

These are EAO Switches,

 

[bobeschism]

These are EAO Switches,

Do you have a link please?

 

[gyraf]

Walrus's link above seems fine?

 

[monsieur yumels]

Dear all,

I was experiencing some weird behavior while trying out the compressor (vanilla state), so I started doing some measurements with the scope at the xlr input and xlr output on one channel.
Input --> 1kHz sine wave 1Vpp.
Attached two pictures with
1) sidechain bypassed (compression switch not engaged) and,
2) compression switch engaged with the threshold poti turned completely to the right.

Is that ca. 0.5Vpp attenuation normal even with bypassed sidechain?
Also, It seems that I get compression even when threshold poti is at its maximum. Is this normal operation?


I soldered 27k resistors before input of the THat 2181 circuits.

Also how do you guys calibrate the meter? I guess this is a well answered question but I am curious for new input.

Thanks for your comments!

p.s The make up gain is completely down with both measurements.

 

[Script]

Could make the 27K a trimmer for calibrating in hard bypass.

Also, It seems that I get compression even when threshold poti is at its maximum. Is this normal operation?

No.

 

[gyraf]

The -6db could come from using unbalanced output? Or are you using a balanced input to your scope?

 

[Nick6691]

Hi.
I´m going to build a GSSL, starting out with the basic unit without mods.
When looking at frontpanels I see there is a lot of diffrent configurations and I want to choose one for a possible future modification.
But I´ve reading these threads for weeks now and I really dont understand all the Supersidechain, turbo, TM,TL oxford etc.
Can someone explain or point me to a post in a thread where it is explained.

Niklas

 

[monsieur yumels]

The -6db could come from using unbalanced output? Or are you using a balanced input to your scope?

Right! No, input to scope is unbalanced (signal and ground).
-6db would be the attenuation factor of 2 that I am seeing. I missed that. Thanks!

The strange behaviour I was mentioning was when operating in stereo (balanced lines too). Sometimes one channel will shut completely off. And also there was some gain mismatches between both channels. Anyway,I have do tomorrow more tests in stereo operation and hopefully post some more data

 

[monsieur yumels]

Hi.
I´m going to build a GSSL, starting out with the basic unit without mods.
When looking at frontpanels I see there is a lot of diffrent configurations and I want to choose one for a possible future modification.
But I´ve reading these threads for weeks now and I really dont understand all the Supersidechain, turbo, TM,TL oxord etc.
Can someone explain or point me to a post in a thread where it is explained.

Niklas

I found this comment helpful

https://groupdiy.com/threads/gssl-add-on-help-thread.65232/post-1133875

 

[Nick6691]

Yes it is, Thanks!

 

[Carnesd]

Hey all, just wanted to share to hopefully give some inspiration to others. Finished up my GSSL with Expat Turbo and CRC add ons and case from Don Audio. Everything is working as expected and it sounds great! Thanks to all who have put together all of this information and help us noobies build some great gear. It's kind of funny, I've built quite a few things in the past (microphones mostly), and came back to Groupdiy to sell off alot of what i wasn't using (so I could focus less on gear and more on recording), but then ended up sticking around and then went head first into another one haha. But I can say it was well worth it!

 

[SIXTYNINER]

Hey all, just wanted to share to hopefully give some inspiration to others. Finished up my GSSL with Expat Turbo and CRC add ons and case from Don Audio. Everything is working as expected and it sounds great! Thanks to all who have put together all of this information and help us noobies build some great gear. It's kind of funny, I've built quite a few things in the past (microphones mostly), and came back to Groupdiy to sell off alot of what i wasn't using (so I could focus less on gear and more on recording), but then ended up sticking around and then went head first into another one haha. But I can say it was well worth it!

Well done !
Those 4 yellow caps on mainboard are very "intriguing",
cheers

 

[JAY X]

Hi!

One question regarding the GSSL schematic.: (Rev9 2013).

On the DBX202 emulation circuit, PIN6 of the NE5534 goes to PIN3 of the THAT 2181 vca, ok so far. But the drawing shows also that a 10k resistor conected at the output of the NE5534, that goes to pin5 of the THAT 2181 vca, which is a power pin. ¿Is this correct?

Thank you very much!
Jay x

 

[krsstyles]

Hey all, just wanted to share to hopefully give some inspiration to others. Finished up my GSSL with Expat Turbo and CRC add ons and case from Don Audio. Everything is working as expected and it sounds great! Thanks to all who have put together all of this information and help us noobies build some great gear. It's kind of funny, I've built quite a few things in the past (microphones mostly), and came back to Groupdiy to sell off alot of what i wasn't using (so I could focus less on gear and more on recording), but then ended up sticking around and then went head first into another one haha. But I can say it was well worth it!

Looks really nice