Very nice JPS64!
Thanks for adding the smoothing caps to the D of each MOSFET for better stereo separation. I see it on the PCB layout but not on the schematic. Is that the correct schematic corresponding to the layout?
Thanks again.
X
Thanks for adding the smoothing caps to the D of each MOSFET for better stereo separation. I see it on the PCB layout but not on the schematic. Is that the correct schematic corresponding to the layout?
Thanks again.
X
nice,
perhaps a through hole option for BFXXX?
Also, is there any particular reason why you make trace entry and exit off-center to the pads?
regards
Prasi
P.S. you may already know this, but there is an option in eagle to export png images directly, it outputs very nice quality images without the background grid
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Hi X,
C39, C40.
Hi Prasi,
thanks for info about export image option (never use); good idea spare hole for TO92; no particular reason.
JP
C39, C40.
Hi Prasi,
thanks for info about export image option (never use); good idea spare hole for TO92; no particular reason.
JP
Custom desktop amp
I just handed this convertible desktop/portable amp off to its new owner. The amp works great and switches seamlessly between battery and wall power. Hot 75mA bias can actually rock some low impedance headphones. There is dual 9v slide out battery tray on the rear panel as well as 5.5mm DC input.
Front panel allows 3.5mm and 1/4in headphone outs (simultaneous).
I just handed this convertible desktop/portable amp off to its new owner. The amp works great and switches seamlessly between battery and wall power. Hot 75mA bias can actually rock some low impedance headphones. There is dual 9v slide out battery tray on the rear panel as well as 5.5mm DC input.
Front panel allows 3.5mm and 1/4in headphone outs (simultaneous).
Attachments
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Hi JP,
Nice!
Do you use a ulp to place all those vias? point me to it. or someone should develop one!
manual placing is too time consuming.
While soldering, one should be very careful, as to not form a bridge between gnd via and the signal pad..
regards
Prasi
edit: Found the ulp!
Nice!
Do you use a ulp to place all those vias? point me to it. or someone should develop one!
manual placing is too time consuming.
While soldering, one should be very careful, as to not form a bridge between gnd via and the signal pad..
regards
Prasi
edit: Found the ulp!
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Hi Prasi,
thank you.
It´s time consuming then, you´re right, no ulp existing, but I prefere to place them manually.
I´d never problems with soldering.
JP
thank you.
It´s time consuming then, you´re right, no ulp existing, but I prefere to place them manually.
I´d never problems with soldering.
JP
Wow that’s beautiful JPS64! You and BDHM did a great job on the layout. The symmetry looks perfect and separate ground planes for left and right and PSU are nicely done. You forgot to add your name to the credits though. Please add layout by BDHM and JPS64 if you want.
Does it need to be 2oz copper or we can go single thickness? I will do ENIG finishes for sure though.
Does it need to be 2oz copper or we can go single thickness? I will do ENIG finishes for sure though.
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Portable desktop based on PCA
Here is a custom amp I made for a customer using the PCA board core. I has 9v batteries plus ability to take DC input via DC step up, the cap Mx and CRCRC. The customer brought along another DIY Class A amp (complex balanced DC coupled type with many parallel push-pull outputs) to compare. You can guess who crushed the competition. It wasn’t even close. In true blind test with ABx switch box. We had a good time listening to headphones as well as speakers.
Here is a custom amp I made for a customer using the PCA board core. I has 9v batteries plus ability to take DC input via DC step up, the cap Mx and CRCRC. The customer brought along another DIY Class A amp (complex balanced DC coupled type with many parallel push-pull outputs) to compare. You can guess who crushed the competition. It wasn’t even close. In true blind test with ABx switch box. We had a good time listening to headphones as well as speakers.
Attachments
That looks awesome JP 😀! Thank you for your hard work! You should definitely add your name there too.
Wow! Another beautiful collaboration X and JPS, and BDHM! Will these be available any time soon?
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I just ordered the boards today. 2mm 2oz ENIG and blue just like the Alpha’s. Should be here in about a week.
Nice X. Will you be selling them through this thread or via Esty? Sorry if I missed the convo, I haven't been following this thread until now.
