I built a setup based on X's advice on veroboard using euroblock connectors that allows me to use different load resistors (10K should work for BA-3) and also includes a 10:1 voltage divider for protecting the interface. With 10K load on the BA-3 you probably don't need the voltage divider so you could just connect the 10K load with a jack in parallel to go into the focusrite (for 1 channel at a time).
I am waiting for Gerbers from BDHM...
Whoops! So is everyone happy with the last layout? If so, I'll send the gerbs.
Lastest Eagle PCB view?
JP
Post #1604 . Only change was the addition of a JST header for a power switch.
If wanted, I´ll do some cosmetic modifications and 3D model before ordering?
I´m using EAGLE 7.5.0.
JP
Cool. I'll send X the Eagle files (version 7.6, should be compatible). If not, let me know.
Edit: files sent
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Hello Baby,
RK097 symbol is wrong! I need the schematic binary also.
JP
How odd ! IIRC it's the symbol and package that came with Eagle. Will send it to you.
Looks very nice, JP and BDHM. Thank you both. I was thinking if we should have a local smoothing cap near the Drain to each MOSFET to help de-couple rail perturbations from one channel to the other? Or make a very low impedance two--layer via plane for the main power node from the last CRCRC cap to each MOSFET Drain.
I recall from testing the PCA that when I ran it with little 47uF rail caps, the stereo separation was like -30dB, and with 2200uF caps it was -72dB, a substantial improvement. We still have room for a 4700uF 25v cap at each MOSFET don't we?
The last time I recall someone named "Baby" was in this popular movie from 1987 featuring Jennifer Grey:
I recall from testing the PCA that when I ran it with little 47uF rail caps, the stereo separation was like -30dB, and with 2200uF caps it was -72dB, a substantial improvement. We still have room for a 4700uF 25v cap at each MOSFET don't we?
The last time I recall someone named "Baby" was in this popular movie from 1987 featuring Jennifer Grey:
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