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The transistor that feeds the DC to the supply capacitors and chip, controlled by the other transistor and TL431 for voltage regulation. The numbers and letters there punched into Mouser would have led you to one. It also requires a small heatsink on it.
Here's one in Ireland. I'll link to comments if he posts them publicly. (He says it's much more impressive than his Amp Camp Amp)
Actually I did try finding the number at Mouser, but no luck? Is that the transistor you are supplying?
It looks like he left the 12 Oscon's proud of the board. Is that suggested to prevent possible shorting of the caps aluminum case?
OK, so if battery power is 24Vdc what is the current requirement?
I've got batteries ordered with the intent to put two 12v's in series to get 24V (that the US Post Office lost yesterday in shipping-althought the torn and crushed box was delivered sans batteries ). I have to call after 4PM today to get their official runaround about why it's not their fault.
Any updates how you like the 24V?
I can't believe that I haven't yet posted my thoughts after Folsom was so kind to let me live with his prototype for a few weeks. My sincere apologies, I should have posted weeks ago. My thoughts on the amp were first that it seems much more powerful than the spec would suggest. It controlled and drove our Perfect Storm White, Arcus, Cirrus Black, and Uber Aurora all with ease. The first impression was clear and open, great soundstage and layering of images in the stage. Independent stage elements were easily discernable and separated in space. There was a nice sense of ease in that the details were delivered without any edge. The amp was an especially nice match for the Arcus, there was plenty of current to drive them to quite high levels, and the Folsom amp really added an extra layer of presence through the mids and upper mids. From 100hz up I'd say this amp was very good in all phases, and excellent in some. The amp was completely non-finicky, giving predicable results on many different speakers. It ran cool, is a great manageable size, and his case was actually quite nice as well. My only negative was bass was noticeably truncated on the Perfect Storm. Folsom said he was going to chance some cap values to help alleviate that, but I haven't heard it since those changes were made. I do plan on having my own pair of Arcus setup permanently in a room here, and when I do plan to have one of the Folsom amps in that room as well.
I'm selfishly bumping this in an effort to draw attention and $$ to the power supply which needs some more neophytes like me to support it. Or anyone, I guess...newbie or not! I'd just like to see it come to fruition.https://www.indiegogo.com/projects/antipole-pcb-filtered-psu#/
It's possible to run as low as 2.3a, but I would have more available, personally. The chip is regulated (internally) at 2a, and the capacitor multiplier uses just a tiny bit.
So like 2.5A @ 24Vdc?
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