Mysterious mixing console

[Harvey Birdman]

Very impressive magazine project.
I'm 73 and have been building projects from magazines since I was about 15 and I must say that I've never seen a mixer project as well documented as this one, (mind you I don't read German unfortunately, just basing my comments on the schematics and BOM).

This could be the basis for a DIY analog console project of any size as it's easily configurable from a simple 4 in 2 out mixer to something of the scale that qspart has acquired. Most of the components are still available and there's nothing wrong with a mixer based on 5534/5532 technology. Could be a good learning curve for newbies or those looking for a sidecar mixer to compliment their in the box DAW. I might even build the mic pre just to see how it performs, always had a soft spot for the 5534.

Did a quick google and found the specs for the output xfmrs:

http://www.revoco.cz/data/datasheets/dbe1130c1.pdf

Would love to get a translation of the complete article!

Thanks qspart and Madman for bringing this to our attention and the pdf of the original article.

 

[qspart]

Or Left and Right...

Is there a Mic/Line switch ?

Yes there is .

 

[nashkato]

😳that is one insane project
i can only imagine the financial resources that went into this .
i really gotta finally finish the quadriga tube amp from mr. haas

 

[qspart]

Some of the pushbutton switches are not working, and I’m struggling to find replacements labeled as Elma 19-482 in the parts list. I’ve searched online but haven’t had much luck locating this specific model.

Does anyone know of a compatible switch or where I might be able to source these?

Additionally, I discovered that there are no line outputs for the 13 mic/line channels , there’s line outputs only for 4 aux and 8 group channels which wouldn’t be enough if I decided to record a band on it . so I’ve ordered 12 UTM3524 output transformers to add line outputs, along with 12 VU meters for some modifications.


One more question: would it be beneficial to replace the 4558 opamps with 5532s? The power supply +-15 volt rails has 22A each should be capable of handling the extra load from the 5532s.is there anything else I should consider before proceeding with that ?


Thanks in advance.