sontec 1 RU build thread

[Script]

Thank you very much. Highly appreciated.

 

[NOON]

https://www.sendspace.com/file/c0dlkk

Unfortunately your download link has expired. Would you still happen to have the files available for this project, original links are all gone too.

 

[druu]

Unfortunately your download link has expired.

Here you go.

 

[NOON]

Thankyou, much appreciated!

 

[Gold]

Does anyone know if Gerber’s were/are available for this?

 

[druu]

Does anyone know if Gerber’s were/are available for this?

No, I don't believe Igor released Gerber's for any of his projects on here.

 

[timpanic]

Hi helpful people !
I am building a sontec clone based on Fabios Baumanns PCBs. Right now with Tl071 and NE5534.
I have one band on the bench and everything works BUT it develops a hum when I turn down the frequency pot ( I have a 24 step one ). This problem is described here a lot but I can not find an obvious solution to it in this thread and the people who had this prob in this thread just disappear without a solution.
Only differences between Fabios and Igors layout are some higher blocking cap values ( changed that already, did nothing to the hum) and some bias options ( also don´t change anything to the prob).
When I disable the band ( Made a switchable Gain Range 6-off-12 ) at the summing resistor I have around 88db snr. Okay for me. When I engage the band a 50/60 hz hum at -72db is clearly visible on the analyser. When I turn the freq up the hum is gone completly. Grounding the knobs doesn´t do anything. Also it seems it is not depending on the freq caps... Should this be gone when the pot is installed at the frontpanel as mentioned here? Could not believe this It should just be working laying on the bench, right?
I am a little afraid of ordering case and fancy knobs just to find out that the unit has this prob in the end. Every hint appreciated

 

[Script]

Grounding the knobs doesn´t do anything.

Not sure what you mean by 'grounding knobs. Not sure about Fabio's boards but on Igor's board, the pots (pot cases) needed grounding for unit to be noise-free -- just installing the faceplate didn't do it on my build.

 

[timpanic]

Not sure what you mean by 'grounding knobs. Not sure about Fabio's boards but on Igor's board, the pots (pot cases) needed grounding for unit to be noise-free -- just installing the faceplate didn't do it on my build.

Yes, grounding the pot cases. Here it is mentioned that when the pots are installed in the frontpanel they would be grounded and then the hum should be gone...

Found out that it´s worse with smaller freq cap values as described several times in this thread.
When I touch ground and cover the pot with my hand without touching it, the hum is significantly lower. Maybe that shows, it could work when it´s cased?....mmhhhh

Edit: it's indeed much better when I put the circuit in a case with normal ground at xlr plus case grounding like usual.
I am always amazed how much difference this makes for some circuits. Some are dead quite on a bread board or even point to point some are an antenna. High impedance magic.
But I think its often more about shielding and resonating than electrical connection there.

 

[ArranDutt]

Hey all, still pretty green to all this. Bought the filter circuits from Collective Cases (Stereo Sontec - G-SON 5 - Collective Cases).

I still need to source the power supply and summing PCBs. Could anyone help point me in the right direction (preferably UK/EU)? Would be much appreciated! Thanks

 

[1wildthing]

Hi ArranDutt do you still have the g-son 5's schematic? I'd like to compare it to Igor's original schematic.

 

[JLandFill]

PSU and summing pcb’s: schematics or links? The original file links aren’t working. Purchased the G Son case and filter pcb’s but I’m at a loss for the power and summing.

Also OPA1656’s appear to be the posh ic’s now that all the ic’s listed in the BOM are discontinued. Very likely I’ll try with 5532’s also.

 

[ArranDutt]

Very late reply, but here's a link for the power supply PCB files posted before:
https://drive.google.com/drive/folders/19XIGAHHCZCmaMe6DXKxNFCzh8uTaQ56t?usp=sharing

Here's a document that was posted before listing the Power Supply schematic as well as the Summing:


Never worked with AutoDesk Fusion, but I've begun trying to learn how to mock it up. That said, if anyone manages to make any headway with this, I'd appreciate if you shared!

 

[MidnightArrakis]

Very late reply, but here's a link for the power supply PCB files posted before:
https://drive.google.com/drive/folders/19XIGAHHCZCmaMe6DXKxNFCzh8uTaQ56t?usp=sharing

Here's a document that was posted before listing the Power Supply schematic as well as the Summing:


Never worked with AutoDesk Fusion, but I've begun trying to learn how to mock it up. That said, if anyone manages to make any headway with this, I'd appreciate if you shared!

With my assumption that you are interested in creating the various types of files associated with PCB's, I would then strongly suggest to you that you forget about "AutoDesk FUSION 360" and instead focus on the -- KiCAD PCB -- program!!! You will be able to accomplish -- MORE -- of what you are looking to do than you will ever be able to do by using FUSION. Here is the KiCAD download link:

https://www.kicad.org/download/

Here is a link to obtain the AutoDesk FUSION 360 program for "Personal Use".....which I believe is a waste of time:

https://www.autodesk.com/products/fusion-360/personal

However, should you wish to continue on the FUSION 360 path, here is a training course on this program:

https://www.hagerman.com/training-s...MI87Xrgo2shgMVcGBHAR0ooQfcEAAYAyAAEgLkHfD_BwE

/

 

[ArranDutt]

With my assumption that you are interested in creating the various types of files associated with PCB's, I would then strongly suggest to you that you forget about "AutoDesk FUSION 360" and instead focus on the -- KiCAD PCB -- program!!! You will be able to accomplish -- MORE -- of what you are looking to do than you will ever be able to do by using FUSION. Here is the KiCAD download link:

https://www.kicad.org/download/

Here is a link to obtain the AutoDesk FUSION 360 program for "Personal Use".....which I believe is a waste of time:

https://www.autodesk.com/products/fusion-360/personal

However, should you wish to continue on the FUSION 360 path, here is a training course on this program:

https://www.hagerman.com/training-s...MI87Xrgo2shgMVcGBHAR0ooQfcEAAYAyAAEgLkHfD_BwE

/

You're an absolute star, thank you!

Will look into this.