I think that double mono symmetric 1.2s and to sense each amp from its own reg where the most important consumption and grounding nodes are on each amp's PCB, that would be optimum. But we can always connect best possible what we got. Post even a cellphone camera picture of your amps and shunts placed as you find handy for inbox construction, so we can think of best compromise.
sense leads should sense where the paralleled outputs leave the single track output. Design the single traces routes as close to the amp boards as possible.
Then put the amp boards as close to the sense points as possible.
Do not sense one board while another board is the load. The signals at one board could be out of phase from the needs of the other board and the reg will make the wrong corrections.
Then put the amp boards as close to the sense points as possible.
Do not sense one board while another board is the load. The signals at one board could be out of phase from the needs of the other board and the reg will make the wrong corrections.
to make a long story short, i wanted to test it because because i heard a joint breaking apart under the board, and i puted -66V into the reg by mistake.dont have any b grade pnp bjt with me so it s going to wait i guess.
now i begin to realize the problem might more be my impatience. i remember my teacher saying courage and patience were the best virtues. now i guess it takes all it s sense!
also, attached is what i had in mind for my amp (beta22). i think that way remote sensing is unnecessary, with the boards very close one to each other. maybe there is a founding mistake or two but the idea is there
now i begin to realize the problem might more be my impatience. i remember my teacher saying courage and patience were the best virtues. now i guess it takes all it s sense!
also, attached is what i had in mind for my amp (beta22). i think that way remote sensing is unnecessary, with the boards very close one to each other. maybe there is a founding mistake or two but the idea is there
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IRFP9240/9140 for IRF9540 if you got TO-247 in inventory. Ricardo uses TO-220 CCS and TO-247 shunt MOS I think.
He uses 47uF Silmic II instead, after my suggestion so to be on the safe side as he is without a scope, thus not able to check if the Zobel would be enough with his layout and load for no oscillation, and/or tweak. Don't use super low ESR output capacitors if you will go lytic. 22-47uF medium ESR if you want to evaluate values and brands/types. Somewhat slower approach than a smaller film and R, but safe.
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