Yesterday I fired up KiCad and made my own PCB layout of an ACA mini. Took me a couple hours in the morning, plus all afternoon.
If you want to discuss that layout, post in that thread & don't pollute this one.
If you want to discuss that layout, post in that thread & don't pollute this one.
FYI the SMPS are also in short supply (at least at Mouser)!
I am replacing mine due to an intermittent buzz issue at turn on that kind of goes away as the amp stat drawing current but I still 'think' I can hear it in the horns.
It was ok for a week after I first experienced the problem but yesterday it came back.
Someone bought the entire stock of the ones supplied with the raffle kit so I bought the 'A' version with the 3 prong AC input. I hope it's OK.
I am replacing mine due to an intermittent buzz issue at turn on that kind of goes away as the amp stat drawing current but I still 'think' I can hear it in the horns.
It was ok for a week after I first experienced the problem but yesterday it came back.
Someone bought the entire stock of the ones supplied with the raffle kit so I bought the 'A' version with the 3 prong AC input. I hope it's OK.
OK, enough people have these running that it's time for my poll:
Do you prefer it with the jumpers in or Out?
Do you prefer it with the jumpers in or Out?
Hmmm, bought the entire stock you say? I wonder who would need that many SMPS switchers?
OK, enough people have these running that it's time for my poll:
Do you prefer it with the jumpers in or Out?
Jumpers in. I find the jumpers out is similar to but not as good as the VFET.
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Like the new site alot!
Sorry that my first post on the new site was a negative note but I just replaced the power supply and the buzz at turn on is still there. It goes away as the amp starts to draw current but I still find that it is a problem that I would like to solve. What are the chances on getting two bad PS in a row? Has anyone experienced this?
Sorry that my first post on the new site was a negative note but I just replaced the power supply and the buzz at turn on is still there. It goes away as the amp starts to draw current but I still find that it is a problem that I would like to solve. What are the chances on getting two bad PS in a row? Has anyone experienced this?
care to say few more details - "at turn on" ..... how loud and for how long?
did you made any change to original schm?
sorry if you already wrote and I missed
did you made any change to original schm?
sorry if you already wrote and I missed
The buzz it's higher freq than the mains ripple or ground loop. It start on both channels after I flip the switch and progressively goes away as ( I am a ssuming) the caps are charged. I must say the two different supplies have slightly distinct buzz the new one seems higher freq. By ear I would say around 1kHz. I don't have a scope to tell more precisely. I just assembled the kit so no changes if one disregards some thermal goo on the output mosfets.
Hi
For those of you like me who prefer not to have flying leads binding posts for the output I just found this easy to use terminals. It will be a great solution for folks who have just like me, thick wood plinth as enclosure. You drill 4 holes for your wires and 2 more to hold the terminals in place and you’re done.
https://www.ebay.ca/itm/403297690462
I’m not associated with this seller, first time I buy from them.
BR
Eric
For those of you like me who prefer not to have flying leads binding posts for the output I just found this easy to use terminals. It will be a great solution for folks who have just like me, thick wood plinth as enclosure. You drill 4 holes for your wires and 2 more to hold the terminals in place and you’re done.
https://www.ebay.ca/itm/403297690462
I’m not associated with this seller, first time I buy from them.
BR
Eric
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