Thanks but beyond my capability, I think. Like I said, there are commercial solutions that would probably give me a good result. I’ll likely go with one of them
Interesting. Wouldn’t that mean I’d have to unplug my speakers when I just wanted to listen to headphones, though? There’s only one pair of speaker outputs
EDIT: oh, I see. It assumes you’d put it in a box with a switch. Not sure I’d want to add an extra connection in there
EDIT: oh, I see. It assumes you’d put it in a box with a switch. Not sure I’d want to add an extra connection in there
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No, it’s ok. I got my answer. The ACP+ is not the best solution for this so I’ll go with one of the other solutions I’ve found. Thanks all for your suggestions 🙂
What a build!!!!
I've been waiting almost a year to build ACP+—ever since missing out on BA last year—I couldn't make it at the last minute. The ACP+ open chassis-less design seriously belongs in the MOMA design store. I still haven't built it—but my 10 year old daughter DID! Obviously with my oversight. I didn't solder a thing—except we broke a mosfet leg and I did step in to repair that—didn't have extras—otherwise it's all her! She had a great time—we built it over a couple of days...(All color decisions—including the yellow "pants" on the LED leads are hers). Oh—and yea, she didn't need any magnifiers to do this—uh—WOW, kids. We looked a data sheets and tested the only 2 J113s I bought (gah!)—turns out they were a match.
Had a little drama with the DC jack and the PSU brick only realized at the critical payoff powerup moment—It would seem that we have a perfectly packaged PN correct brick per Nelson's BOM—that is internally center Neg! IDK. (DC jack from BOM is 2.5mm, PN should be PJ-037A [digikey CP-037A-ND] for 2.1mm. Sorry Nelson!). Took a minute and some 6L6 to figure it all out—mid flight for him! DEDICATION 😀. Hardwired the leads in the end and wrapped the cable around the standoff between the ground plane for some stress relief. Also just filed down the lugs on a toggle switch we had on hand to fit the PCB holes for a power switch—no prob. In the end hardwiring the brick is probably better—since with a 10 year old—experimentation is a thing. She was definitely into seeing what, and at what rate, things might burn that got touched with the iron within reach. Haha. Bemused by the fact that nothing would hurt the silicone work matt.
She's going to pair this with dual ACAs (one of which she helped me build a ways back) and some speakers that we are building next—gift kit from a friend!
Tested it into M2X. Sounds fantastic—definitely gets PLENTY loud. Dead quiet to boot into 97db speaks—rendered the SP-10MKII beautifully. SO AWESOME!!!!!!!
Thanks of course to Nelson and his insane generosity.
I've been waiting almost a year to build ACP+—ever since missing out on BA last year—I couldn't make it at the last minute. The ACP+ open chassis-less design seriously belongs in the MOMA design store. I still haven't built it—but my 10 year old daughter DID! Obviously with my oversight. I didn't solder a thing—except we broke a mosfet leg and I did step in to repair that—didn't have extras—otherwise it's all her! She had a great time—we built it over a couple of days...(All color decisions—including the yellow "pants" on the LED leads are hers). Oh—and yea, she didn't need any magnifiers to do this—uh—WOW, kids. We looked a data sheets and tested the only 2 J113s I bought (gah!)—turns out they were a match.
Had a little drama with the DC jack and the PSU brick only realized at the critical payoff powerup moment—It would seem that we have a perfectly packaged PN correct brick per Nelson's BOM—that is internally center Neg! IDK. (DC jack from BOM is 2.5mm, PN should be PJ-037A [digikey CP-037A-ND] for 2.1mm. Sorry Nelson!). Took a minute and some 6L6 to figure it all out—mid flight for him! DEDICATION 😀. Hardwired the leads in the end and wrapped the cable around the standoff between the ground plane for some stress relief. Also just filed down the lugs on a toggle switch we had on hand to fit the PCB holes for a power switch—no prob. In the end hardwiring the brick is probably better—since with a 10 year old—experimentation is a thing. She was definitely into seeing what, and at what rate, things might burn that got touched with the iron within reach. Haha. Bemused by the fact that nothing would hurt the silicone work matt.
She's going to pair this with dual ACAs (one of which she helped me build a ways back) and some speakers that we are building next—gift kit from a friend!
Tested it into M2X. Sounds fantastic—definitely gets PLENTY loud. Dead quiet to boot into 97db speaks—rendered the SP-10MKII beautifully. SO AWESOME!!!!!!!
Thanks of course to Nelson and his insane generosity.
Attachments
That’s awesome pfarrell!!! I’ve been waiting for the right time to build an ACA with my daughter, but sounds like this would be a good project to consider too!
That's the most awesome thing I've seen this week. Just fantastic!!!! Congratulations to you and your daughter.
🙂 🙂 🙂
🙂 🙂 🙂
I just showed my daughter your pictures pfarrell. Her response was, “that’s really cool! What’s an amplifier again?” Guess I have some basics to teach before we build anything 🙂
That's the most adorable thing I've read on diyAudio in AT LEAST a year.
What a Dad. What an enthusiastic kid. What a wholesome bonding experience.
Good on ya both
Mark
My full respect to your daughter and the dad!
I like the pic where she is checking the schematic and comparing to the
stuffed pcb. Fully concentrated on the work. Great!
And the kids learn fast at this age.
Greets
Dirk
I like the pic where she is checking the schematic and comparing to the
stuffed pcb. Fully concentrated on the work. Great!
And the kids learn fast at this age.
Greets
Dirk
Looking to use Toshiba 2SK2013 on the outputs. Any reliable source here in DiyA? I can also trade original 2SJ74s for them.
Looking to use Toshiba 2SK2013 on the outputs. Any reliable source here in DiyA? I can also trade original 2SJ74s for them.
I was looking at that same substitution. Are you planning to swap any other component values? Concerning the MOSFETs, you might try Jeff Young
I have the same question. I've seen it asked a couple times on this thread, but haven't seen an answer yet.