Good stuff👍. I also enjoy giving back to a community that I get a lot of pleasure from.
Nothing really
Just a good thought out layout - its just a name
I like the PCB layout and it sounds nice
ok nearly complete just waiting for some screened cable to arrive then can do a listing test and start to test some different op amps
so first op amp test the OPA2134PA -
so first op amp test the OPA2134PA -
I have added a better earth connection to connect to the earth lift PCB, might make this switchable next time
1 - direct earth
2 - open connection
3 - connection via earth lift PCB
1 - direct earth
2 - open connection
3 - connection via earth lift PCB
Regarding the test chassis I order a 3mm thick Aluminium sheets laser cut to any size that I need (online)
this then forms a basic layout / test bench prototype before committing to a final expensive case build, I find this useful and the ability to test built boards in the future
this then forms a basic layout / test bench prototype before committing to a final expensive case build, I find this useful and the ability to test built boards in the future
Attachments
That will get you started. Will you be taking any measurements of the results with the various opamps, specifically distortion? Testing with a CRO to look for instability will be beneficial too.
What performance metrics are you hoping to improve on compared to the original design?
What performance metrics are you hoping to improve on compared to the original design?
I will start the first op amp test once I find my head phones and sort out the music source
will probably be PC based using J River media
https://www.jriver.com/
will probably be PC based using J River media
https://www.jriver.com/
just putting this out there
this unit may be for sale .. what do you think would be a fair price
this unit may be for sale .. what do you think would be a fair price